/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:39:34,549 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:39:34,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:39:34,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:39:34,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:39:34,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:39:34,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:39:34,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:39:34,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:39:34,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:39:34,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:39:34,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:39:34,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:39:34,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:39:34,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:39:34,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:39:34,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:39:34,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:39:34,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:39:34,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:39:34,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:39:34,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:39:34,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:39:34,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:39:34,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:39:34,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:39:34,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:39:34,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:39:34,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:39:34,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:39:34,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:39:34,623 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:39:34,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:39:34,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:39:34,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:39:34,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:39:34,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:39:34,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:39:34,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:39:34,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:39:34,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:39:34,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:39:34,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:34,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:39:34,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:39:34,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:39:34,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:39:34,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:39:34,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:39:34,911 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:39:34,911 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:39:34,912 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 21:39:34,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4573ee4ea/e9177a36b56d488f9fb92ecfb382b7da/FLAG630286f48 [2020-07-20 21:39:35,421 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:39:35,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 21:39:35,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4573ee4ea/e9177a36b56d488f9fb92ecfb382b7da/FLAG630286f48 [2020-07-20 21:39:35,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4573ee4ea/e9177a36b56d488f9fb92ecfb382b7da [2020-07-20 21:39:35,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:39:35,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:39:35,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:39:35,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:39:35,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:39:35,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:39:35" (1/1) ... [2020-07-20 21:39:35,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5cef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:35, skipping insertion in model container [2020-07-20 21:39:35,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:39:35" (1/1) ... [2020-07-20 21:39:35,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:39:35,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:39:36,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:39:36,020 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:39:36,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:39:36,051 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:39:36,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36 WrapperNode [2020-07-20 21:39:36,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:39:36,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:39:36,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:39:36,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:39:36,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... [2020-07-20 21:39:36,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:39:36,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:39:36,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:39:36,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:39:36,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:39:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:39:36,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:39:36,225 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 21:39:36,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:39:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:39:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 21:39:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:39:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:39:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:39:36,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:39:36,404 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:39:36,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:39:36 BoogieIcfgContainer [2020-07-20 21:39:36,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:39:36,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:39:36,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:39:36,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:39:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:39:35" (1/3) ... [2020-07-20 21:39:36,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1787b1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:39:36, skipping insertion in model container [2020-07-20 21:39:36,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:39:36" (2/3) ... [2020-07-20 21:39:36,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1787b1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:39:36, skipping insertion in model container [2020-07-20 21:39:36,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:39:36" (3/3) ... [2020-07-20 21:39:36,417 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-20 21:39:36,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:39:36,438 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:39:36,453 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:39:36,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:39:36,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:39:36,484 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:39:36,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:39:36,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:39:36,485 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:39:36,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:39:36,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:39:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 21:39:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:39:36,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:36,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:36,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 21:39:36,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:36,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226742394] [2020-07-20 21:39:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:36,653 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:36,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:39:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:39:36,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:39:36,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226742394] [2020-07-20 21:39:36,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:39:36,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:39:36,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7027393] [2020-07-20 21:39:36,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:39:36,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:39:36,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:39:36,766 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 21:39:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:36,870 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 21:39:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:39:36,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:39:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:36,881 INFO L225 Difference]: With dead ends: 30 [2020-07-20 21:39:36,881 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 21:39:36,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 21:39:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 21:39:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 21:39:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 21:39:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 21:39:36,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 21:39:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:36,929 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 21:39:36,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:39:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 21:39:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:39:36,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:36,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:37,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:37,147 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 21:39:37,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:37,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406319268] [2020-07-20 21:39:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:37,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:37,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:39:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:37,238 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 21:39:37,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:37,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:37,475 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 21:39:37,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406319268] [2020-07-20 21:39:37,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:37,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:39:37,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748417267] [2020-07-20 21:39:37,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:39:37,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:39:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:39:37,480 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 21:39:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:37,550 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 21:39:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:39:37,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 21:39:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:37,552 INFO L225 Difference]: With dead ends: 25 [2020-07-20 21:39:37,553 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 21:39:37,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:39:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 21:39:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 21:39:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:39:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 21:39:37,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 21:39:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:37,562 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 21:39:37,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:39:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 21:39:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:39:37,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:37,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:37,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:37,778 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 21:39:37,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:37,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219900457] [2020-07-20 21:39:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:37,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:37,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:37,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:39:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 21:39:37,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:38,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:39:38,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219900457] [2020-07-20 21:39:38,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:38,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:39:38,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552552329] [2020-07-20 21:39:38,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:39:38,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:39:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:39:38,194 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 21:39:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:38,265 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 21:39:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:39:38,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 21:39:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:38,267 INFO L225 Difference]: With dead ends: 28 [2020-07-20 21:39:38,267 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 21:39:38,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:39:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 21:39:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 21:39:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 21:39:38,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 21:39:38,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 21:39:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:38,275 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 21:39:38,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:39:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 21:39:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 21:39:38,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:38,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:38,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:38,483 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 21:39:38,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:38,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502639856] [2020-07-20 21:39:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:38,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:38,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:39:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 21:39:38,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:38,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:39:39,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502639856] [2020-07-20 21:39:39,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:39,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:39:39,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496864985] [2020-07-20 21:39:39,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:39:39,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:39,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:39:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:39:39,122 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 21:39:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:39,204 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 21:39:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:39:39,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 21:39:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:39,206 INFO L225 Difference]: With dead ends: 31 [2020-07-20 21:39:39,206 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 21:39:39,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 21:39:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 21:39:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 21:39:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 21:39:39,213 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 21:39:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:39,214 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 21:39:39,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:39:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 21:39:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 21:39:39,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:39,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:39,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:39,431 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 21:39:39,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:39,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28351548] [2020-07-20 21:39:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:39,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:39,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:39:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 21:39:39,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:40,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 21:39:40,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28351548] [2020-07-20 21:39:40,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:40,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:39:40,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270156185] [2020-07-20 21:39:40,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:39:40,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:39:40,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:39:40,358 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-20 21:39:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:40,465 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 21:39:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:39:40,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-20 21:39:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:40,472 INFO L225 Difference]: With dead ends: 34 [2020-07-20 21:39:40,472 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 21:39:40,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 21:39:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 21:39:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:39:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 21:39:40,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 21:39:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:40,479 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 21:39:40,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:39:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 21:39:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 21:39:40,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:40,481 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:40,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:40,683 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:40,684 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 21:39:40,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:40,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139864135] [2020-07-20 21:39:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:40,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:40,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 21:39:40,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:41,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:41,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:41,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:41,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:42,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:42,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:42,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 21:39:42,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139864135] [2020-07-20 21:39:42,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:42,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 21:39:42,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584717017] [2020-07-20 21:39:42,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:42,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:42,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:42,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:42,139 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-20 21:39:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:42,269 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 21:39:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:39:42,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-20 21:39:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:42,277 INFO L225 Difference]: With dead ends: 37 [2020-07-20 21:39:42,277 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 21:39:42,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 21:39:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 21:39:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 21:39:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 21:39:42,286 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 21:39:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:42,287 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 21:39:42,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 21:39:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 21:39:42,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:42,289 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:42,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:42,503 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 21:39:42,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:42,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353650066] [2020-07-20 21:39:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:42,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:42,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 21:39:42,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:43,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 21:39:44,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353650066] [2020-07-20 21:39:44,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:44,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 21:39:44,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301945498] [2020-07-20 21:39:44,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:44,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:44,615 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-20 21:39:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:44,774 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 21:39:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:44,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-20 21:39:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:44,776 INFO L225 Difference]: With dead ends: 40 [2020-07-20 21:39:44,776 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 21:39:44,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 21:39:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 21:39:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:39:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 21:39:44,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 21:39:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:44,784 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 21:39:44,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 21:39:44,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 21:39:44,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:44,785 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:44,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:44,991 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 21:39:44,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:44,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765951767] [2020-07-20 21:39:44,995 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 21:39:45,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:39:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 21:39:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:46,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 21:39:47,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765951767] [2020-07-20 21:39:47,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:47,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 21:39:47,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372610845] [2020-07-20 21:39:47,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:39:47,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:39:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:39:47,955 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-20 21:39:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:48,159 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 21:39:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:48,162 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 21:39:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:48,163 INFO L225 Difference]: With dead ends: 43 [2020-07-20 21:39:48,163 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 21:39:48,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:39:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 21:39:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 21:39:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 21:39:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 21:39:48,170 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 21:39:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:48,170 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 21:39:48,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:39:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 21:39:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 21:39:48,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:48,172 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:48,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:48,376 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 21:39:48,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:48,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875194758] [2020-07-20 21:39:48,379 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 21:39:48,489 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:48,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:39:48,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 21:39:48,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:50,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 21:39:52,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875194758] [2020-07-20 21:39:52,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:52,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 21:39:52,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661982048] [2020-07-20 21:39:52,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 21:39:52,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:52,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 21:39:52,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:52,602 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-20 21:39:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:52,791 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 21:39:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:39:52,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-20 21:39:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:52,794 INFO L225 Difference]: With dead ends: 46 [2020-07-20 21:39:52,794 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:39:52,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:39:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:39:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 21:39:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 21:39:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 21:39:52,803 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 21:39:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:52,804 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 21:39:52,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 21:39:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 21:39:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 21:39:52,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:52,805 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:53,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:53,009 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:53,010 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 21:39:53,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:53,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722701219] [2020-07-20 21:39:53,012 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 21:39:53,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:39:53,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:39:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 21:39:53,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:55,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:55,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 21:39:58,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722701219] [2020-07-20 21:39:58,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:58,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:39:58,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753284986] [2020-07-20 21:39:58,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:39:58,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:39:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:39:58,785 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-20 21:39:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:58,993 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 21:39:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:39:58,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-20 21:39:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:59,000 INFO L225 Difference]: With dead ends: 49 [2020-07-20 21:39:59,001 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 21:39:59,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:39:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 21:39:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 21:39:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:39:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 21:39:59,008 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 21:39:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:59,009 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 21:39:59,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:39:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 21:39:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 21:39:59,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:59,011 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:59,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:59,216 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 21:39:59,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:59,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837381469] [2020-07-20 21:39:59,218 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 21:39:59,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:59,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-20 21:39:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 21:39:59,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:04,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:04,833 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:04,833 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:04,834 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:04,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:04,836 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:04,837 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:04,838 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:04,839 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:04,840 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:04,840 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:04,841 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:04,842 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:06,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:06,822 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:06,823 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:06,824 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:06,824 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:06,826 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 21:40:06,826 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:06,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,829 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:06,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:08,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:08,408 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:08,409 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:08,410 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:08,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:08,412 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:08,412 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:08,413 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:08,414 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:08,415 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:08,416 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:08,417 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:08,418 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:09,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:09,662 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:09,662 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:09,664 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:09,664 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:09,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:09,666 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 21:40:09,667 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:09,668 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:09,669 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 21:40:09,670 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:09,670 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:10,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:10,666 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:10,667 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:10,667 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:10,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:10,669 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:10,669 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:10,670 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:10,671 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:10,672 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:10,673 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:10,674 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:10,674 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:11,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:11,447 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:11,448 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:11,448 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:11,449 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:11,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:11,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:11,450 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:11,450 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:11,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:11,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:11,452 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:11,453 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:11,454 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:11,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:11,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:11,996 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:11,996 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:11,997 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:11,998 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:11,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:11,999 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,001 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,002 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,004 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:12,489 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:12,490 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,491 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:12,491 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:12,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,493 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 21:40:12,494 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,495 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:12,496 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 21:40:12,497 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,497 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 21:40:12,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:12,832 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:12,833 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:12,833 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:12,834 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,835 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 21:40:12,836 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,837 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:12,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:13,127 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:13,128 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:13,129 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 21:40:13,130 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 21:40:13,131 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:13,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,133 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:13,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,136 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:13,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,138 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 21:40:13,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:40:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 21:40:13,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837381469] [2020-07-20 21:40:13,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:13,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 37] total 61 [2020-07-20 21:40:13,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067871900] [2020-07-20 21:40:13,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 21:40:13,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 21:40:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 21:40:13,333 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 61 states. [2020-07-20 21:40:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:14,381 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 21:40:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 21:40:14,382 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 73 [2020-07-20 21:40:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:14,385 INFO L225 Difference]: With dead ends: 52 [2020-07-20 21:40:14,385 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 21:40:14,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1591, Invalid=5051, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 21:40:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 21:40:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 21:40:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 21:40:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 21:40:14,393 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 21:40:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:14,394 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 21:40:14,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 21:40:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 21:40:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 21:40:14,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:14,395 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:14,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:14,600 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 21:40:14,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:14,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993480872] [2020-07-20 21:40:14,603 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 21:40:14,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:40:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 21 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-20 21:40:15,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:18,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:20,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 21:40:23,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993480872] [2020-07-20 21:40:23,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:23,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-20 21:40:23,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47236332] [2020-07-20 21:40:23,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:40:23,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:40:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:40:23,551 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-07-20 21:40:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:23,781 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-07-20 21:40:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:40:23,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-07-20 21:40:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:23,783 INFO L225 Difference]: With dead ends: 48 [2020-07-20 21:40:23,784 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:40:23,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 21:40:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:40:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:40:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:40:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:40:23,786 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-20 21:40:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:23,786 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:40:23,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:40:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:40:23,787 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:40:23,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:23,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:40:24,074 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:40:24,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:40:24,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:40:24,074 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:40:24,075 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:40:24,075 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:40:24,075 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 21:40:24,075 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (<= 1 |sum_#in~n|) (<= |sum_#in~n| sum_~n)) [2020-07-20 21:40:24,075 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 21:40:24,075 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 21:40:24,075 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 21:40:24,076 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 21:40:24,076 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 21:40:24,076 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 21:40:24,076 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 21:40:24,076 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 21:40:24,076 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 21:40:24,076 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-07-20 21:40:24,077 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 21:40:24,077 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 21:40:24,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:40:24 BoogieIcfgContainer [2020-07-20 21:40:24,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:40:24,086 INFO L168 Benchmark]: Toolchain (without parser) took 48265.29 ms. Allocated memory was 137.9 MB in the beginning and 494.9 MB in the end (delta: 357.0 MB). Free memory was 102.5 MB in the beginning and 407.6 MB in the end (delta: -305.1 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:40:24,087 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:40:24,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.25 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:40:24,088 INFO L168 Benchmark]: Boogie Preprocessor took 24.25 ms. Allocated memory is still 137.9 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:40:24,089 INFO L168 Benchmark]: RCFGBuilder took 330.58 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 169.8 MB in the end (delta: -78.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:40:24,090 INFO L168 Benchmark]: TraceAbstraction took 47673.55 ms. Allocated memory was 201.9 MB in the beginning and 494.9 MB in the end (delta: 293.1 MB). Free memory was 169.8 MB in the beginning and 407.6 MB in the end (delta: -237.7 MB). Peak memory consumption was 55.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:40:24,093 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 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.25 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.25 ms. Allocated memory is still 137.9 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.58 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 169.8 MB in the end (delta: -78.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 47673.55 ms. Allocated memory was 201.9 MB in the beginning and 494.9 MB in the end (delta: 293.1 MB). Free memory was 169.8 MB in the beginning and 407.6 MB in the end (delta: -237.7 MB). Peak memory consumption was 55.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47.5s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 602 SDslu, 1014 SDs, 0 SdLazy, 776 SolverSat, 314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1177 GetRequests, 737 SyntacticMatches, 133 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 25 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 40.8s InterpolantComputationTime, 552 NumberOfCodeBlocks, 327 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1068 ConstructedInterpolants, 0 QuantifiedInterpolants, 274896 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1293 ConjunctsInSsa, 269 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 1431/3168 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...