/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/loop-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:33:13,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:33:13,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:33:13,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 22:33:13,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:33:13,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:33:13,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:33:13,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:33:13,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:33:13,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:33:13,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:33:13,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:33:13,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:33:13,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:33:13,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:33:13,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:33:13,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:33:13,984 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 22:33:13,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:33:13,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:33:14,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:33:14,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:33:14,001 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:33:14,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:33:14,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:33:14,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:33:14,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:33:14,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:33:14,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:33:14,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:33:14,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:33:14,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:33:14,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:33:14,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:33:14,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:33:14,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:33:14,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:33:14,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:33:14,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:33:14,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:33:14,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:33:14,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:33:14,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:33:14,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:33:14,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:14,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:33:14,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:33:14,006 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 22:33:14,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:33:14,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:33:14,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:33:14,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:33:14,319 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:33:14,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2020-07-20 22:33:14,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc607db8/bfb7a52a8a88484896f8ec0c0069ac0d/FLAG9c4d66539 [2020-07-20 22:33:14,851 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:33:14,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2020-07-20 22:33:14,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc607db8/bfb7a52a8a88484896f8ec0c0069ac0d/FLAG9c4d66539 [2020-07-20 22:33:15,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cc607db8/bfb7a52a8a88484896f8ec0c0069ac0d [2020-07-20 22:33:15,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:33:15,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:33:15,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:33:15,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:33:15,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:33:15,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f1137b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15, skipping insertion in model container [2020-07-20 22:33:15,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:33:15,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:33:15,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:33:15,525 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:33:15,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:33:15,563 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:33:15,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15 WrapperNode [2020-07-20 22:33:15,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:33:15,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:33:15,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:33:15,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:33:15,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (1/1) ... [2020-07-20 22:33:15,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:33:15,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:33:15,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:33:15,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:33:15,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (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 22:33:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:33:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:33:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:33:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:33:15,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:33:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:33:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:33:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:33:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:33:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:33:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:33:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:33:15,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:33:15,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:33:15,981 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:33:15,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:33:15 BoogieIcfgContainer [2020-07-20 22:33:15,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:33:15,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:33:15,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:33:15,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:33:15,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:33:15" (1/3) ... [2020-07-20 22:33:15,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1904334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:33:15, skipping insertion in model container [2020-07-20 22:33:15,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:15" (2/3) ... [2020-07-20 22:33:15,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1904334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:33:15, skipping insertion in model container [2020-07-20 22:33:15,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:33:15" (3/3) ... [2020-07-20 22:33:15,994 INFO L109 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2020-07-20 22:33:16,005 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:33:16,013 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:33:16,027 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:33:16,051 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:33:16,051 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:33:16,051 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:33:16,052 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:33:16,052 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:33:16,052 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:33:16,052 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:33:16,052 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:33:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 22:33:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:33:16,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:16,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:16,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash -677001103, now seen corresponding path program 1 times [2020-07-20 22:33:16,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:16,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247217157] [2020-07-20 22:33:16,091 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 22:33:16,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:16,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:33:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:16,330 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:16,386 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 22:33:16,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:33:16,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247217157] [2020-07-20 22:33:16,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:33:16,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:33:16,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214764007] [2020-07-20 22:33:16,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:33:16,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:33:16,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:33:16,412 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-07-20 22:33:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:16,546 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-07-20 22:33:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:33:16,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-20 22:33:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:16,557 INFO L225 Difference]: With dead ends: 41 [2020-07-20 22:33:16,557 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 22:33:16,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:33:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 22:33:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 22:33:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 22:33:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 22:33:16,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 22:33:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:16,604 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 22:33:16,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:33:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 22:33:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:33:16,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:16,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:16,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:16,821 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash 523340046, now seen corresponding path program 1 times [2020-07-20 22:33:16,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:16,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537544431] [2020-07-20 22:33:16,823 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 22:33:16,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:33:16,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 22:33:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:16,934 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:16,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:17,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:17,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537544431] [2020-07-20 22:33:17,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:17,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 22:33:17,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194440642] [2020-07-20 22:33:17,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:33:17,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:33:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:33:17,073 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-07-20 22:33:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:17,279 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-20 22:33:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:33:17,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-07-20 22:33:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:17,281 INFO L225 Difference]: With dead ends: 22 [2020-07-20 22:33:17,281 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 22:33:17,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:33:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 22:33:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 22:33:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 22:33:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-20 22:33:17,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-07-20 22:33:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:17,289 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-20 22:33:17,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:33:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-20 22:33:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 22:33:17,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:17,290 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:17,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:17,492 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1555818862, now seen corresponding path program 2 times [2020-07-20 22:33:17,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:17,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134071181] [2020-07-20 22:33:17,494 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 22:33:17,543 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:17,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 22:33:17,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:17,627 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:17,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:17,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:17,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134071181] [2020-07-20 22:33:17,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:17,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 22:33:17,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785354609] [2020-07-20 22:33:17,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 22:33:17,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 22:33:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:33:17,813 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2020-07-20 22:33:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:18,238 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-07-20 22:33:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 22:33:18,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 22:33:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:18,240 INFO L225 Difference]: With dead ends: 26 [2020-07-20 22:33:18,240 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 22:33:18,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2020-07-20 22:33:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 22:33:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 22:33:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 22:33:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-20 22:33:18,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-07-20 22:33:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:18,252 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-20 22:33:18,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 22:33:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-20 22:33:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 22:33:18,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:18,254 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:18,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:18,467 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 399696430, now seen corresponding path program 3 times [2020-07-20 22:33:18,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:18,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61516727] [2020-07-20 22:33:18,469 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 22:33:18,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:18,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 22:33:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:18,671 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:18,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:18,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:19,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61516727] [2020-07-20 22:33:19,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:19,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 22:33:19,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337779067] [2020-07-20 22:33:19,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 22:33:19,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 22:33:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-07-20 22:33:19,028 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 22 states. [2020-07-20 22:33:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:20,158 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-07-20 22:33:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 22:33:20,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-07-20 22:33:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:20,161 INFO L225 Difference]: With dead ends: 34 [2020-07-20 22:33:20,161 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 22:33:20,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 22:33:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 22:33:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 22:33:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:33:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-20 22:33:20,176 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2020-07-20 22:33:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:20,176 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-20 22:33:20,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 22:33:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-20 22:33:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 22:33:20,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:20,178 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:20,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:20,379 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -852380754, now seen corresponding path program 4 times [2020-07-20 22:33:20,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:20,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737283337] [2020-07-20 22:33:20,382 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 22:33:20,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:33:20,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:20,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-20 22:33:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:20,740 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:20,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:20,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:21,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737283337] [2020-07-20 22:33:21,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:21,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2020-07-20 22:33:21,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470899210] [2020-07-20 22:33:21,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 22:33:21,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 22:33:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 22:33:21,695 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 38 states. [2020-07-20 22:33:22,598 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 22:33:22,843 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-07-20 22:33:23,054 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 22:33:23,265 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-07-20 22:33:25,413 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 22:33:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:25,425 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-07-20 22:33:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 22:33:25,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 27 [2020-07-20 22:33:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:25,428 INFO L225 Difference]: With dead ends: 50 [2020-07-20 22:33:25,428 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 22:33:25,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1192, Invalid=3920, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 22:33:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 22:33:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 22:33:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 22:33:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-07-20 22:33:25,443 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 27 [2020-07-20 22:33:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:25,444 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-07-20 22:33:25,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 22:33:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-07-20 22:33:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 22:33:25,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:25,445 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:25,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:25,653 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2114791762, now seen corresponding path program 5 times [2020-07-20 22:33:25,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:25,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935397266] [2020-07-20 22:33:25,655 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 22:33:25,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:33:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:25,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 132 conjunts are in the unsatisfiable core [2020-07-20 22:33:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:26,728 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:26,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:26,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:29,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935397266] [2020-07-20 22:33:29,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:29,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 70 [2020-07-20 22:33:29,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839489327] [2020-07-20 22:33:29,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-20 22:33:29,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-20 22:33:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1102, Invalid=3728, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 22:33:29,903 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 70 states. [2020-07-20 22:33:32,650 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-07-20 22:33:33,240 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 136 [2020-07-20 22:33:33,840 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 22:33:34,416 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 132 [2020-07-20 22:33:34,986 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 22:33:35,614 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-20 22:33:36,164 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 22:33:36,713 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-20 22:33:37,241 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-20 22:33:37,742 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-20 22:33:38,222 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-20 22:33:38,708 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 22:33:39,272 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-20 22:33:39,726 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-20 22:33:40,169 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 22:33:40,608 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 22:33:41,019 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 22:33:41,439 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 22:33:41,818 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 22:33:42,182 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 22:33:42,537 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 22:33:42,877 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 22:33:46,425 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-07-20 22:33:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:46,436 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2020-07-20 22:33:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-20 22:33:46,437 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 43 [2020-07-20 22:33:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:46,439 INFO L225 Difference]: With dead ends: 82 [2020-07-20 22:33:46,439 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 22:33:46,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=4408, Invalid=13952, Unknown=0, NotChecked=0, Total=18360 [2020-07-20 22:33:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 22:33:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-20 22:33:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 22:33:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-07-20 22:33:46,469 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 43 [2020-07-20 22:33:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:46,469 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-07-20 22:33:46,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-20 22:33:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-07-20 22:33:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 22:33:46,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:46,472 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:46,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:46,686 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:46,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1115480914, now seen corresponding path program 6 times [2020-07-20 22:33:46,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:46,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763505507] [2020-07-20 22:33:46,688 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 22:33:46,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:33:46,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:46,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 260 conjunts are in the unsatisfiable core [2020-07-20 22:33:46,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:50,452 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:50,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:50,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:34:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:34:03,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763505507] [2020-07-20 22:34:03,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:34:03,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 134 [2020-07-20 22:34:03,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616353948] [2020-07-20 22:34:03,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-20 22:34:03,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:34:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-20 22:34:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4238, Invalid=13584, Unknown=0, NotChecked=0, Total=17822 [2020-07-20 22:34:03,563 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 134 states. [2020-07-20 22:34:14,139 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 390 [2020-07-20 22:34:15,826 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 391 DAG size of output: 264 [2020-07-20 22:34:18,534 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 22:34:20,117 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 386 DAG size of output: 260 [2020-07-20 22:34:22,720 WARN L193 SmtUtils]: Spent 995.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2020-07-20 22:34:25,514 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2020-07-20 22:34:28,111 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-07-20 22:34:30,688 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-07-20 22:34:33,240 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-07-20 22:34:35,785 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-07-20 22:34:38,338 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-07-20 22:34:40,894 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2020-07-20 22:34:43,415 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2020-07-20 22:34:45,913 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-07-20 22:34:48,387 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-07-20 22:34:50,898 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-07-20 22:34:53,364 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-07-20 22:34:55,793 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-07-20 22:34:58,286 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-07-20 22:35:00,736 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-07-20 22:35:03,374 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-07-20 22:35:05,995 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2020-07-20 22:35:08,464 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-20 22:35:10,874 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 22:35:13,232 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-07-20 22:35:15,613 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2020-07-20 22:35:17,997 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-20 22:35:20,352 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-07-20 22:35:22,681 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-20 22:35:25,011 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-07-20 22:35:27,303 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-07-20 22:35:29,516 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-20 22:35:31,697 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-20 22:35:33,876 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 22:35:36,009 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-07-20 22:35:38,319 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 22:35:40,556 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 22:35:42,840 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-20 22:35:45,086 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 22:35:47,298 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-20 22:35:49,445 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-20 22:35:51,575 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-20 22:35:53,642 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-20 22:35:55,677 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 22:35:57,682 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-20 22:35:59,638 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-20 22:36:01,551 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 22:36:03,398 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 22:36:05,203 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 22:36:06,907 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 22:36:08,587 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 22:36:10,191 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 22:36:11,757 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 22:36:13,222 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 22:36:14,661 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 22:36:16,006 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 22:36:17,281 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 22:36:18,488 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 22:36:19,625 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 22:36:20,617 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 22:36:21,593 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 22:36:30,770 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 22:36:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:36:30,792 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2020-07-20 22:36:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-07-20 22:36:30,794 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 75 [2020-07-20 22:36:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:36:30,796 INFO L225 Difference]: With dead ends: 146 [2020-07-20 22:36:30,797 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 22:36:30,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8696 ImplicationChecksByTransitivity, 156.8s TimeCoverageRelationStatistics Valid=16984, Invalid=52448, Unknown=0, NotChecked=0, Total=69432 [2020-07-20 22:36:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 22:36:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-07-20 22:36:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 22:36:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-07-20 22:36:30,860 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 75 [2020-07-20 22:36:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:36:30,860 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-07-20 22:36:30,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-20 22:36:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-07-20 22:36:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 22:36:30,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:36:30,865 INFO L422 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:36:31,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:36:31,067 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:36:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:36:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash -858019666, now seen corresponding path program 7 times [2020-07-20 22:36:31,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:36:31,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609913461] [2020-07-20 22:36:31,069 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 22:36:31,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:36:31,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:36:31,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 516 conjunts are in the unsatisfiable core [2020-07-20 22:36:31,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:36:59,199 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:37:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:37:00,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:37:01,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:39:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:39:36,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609913461] [2020-07-20 22:39:36,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:39:36,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 262 [2020-07-20 22:39:36,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271639139] [2020-07-20 22:39:36,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 262 states [2020-07-20 22:39:36,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:39:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2020-07-20 22:39:36,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16654, Invalid=51728, Unknown=0, NotChecked=0, Total=68382 [2020-07-20 22:39:36,940 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 262 states. [2020-07-20 22:42:27,629 WARN L193 SmtUtils]: Spent 6.87 s on a formula simplification that was a NOOP. DAG size: 774 [2020-07-20 22:42:38,598 WARN L193 SmtUtils]: Spent 8.76 s on a formula simplification. DAG size of input: 775 DAG size of output: 520 [2020-07-20 22:43:36,364 WARN L193 SmtUtils]: Spent 10.65 s on a formula simplification that was a NOOP. DAG size: 766 [2020-07-20 22:43:48,499 WARN L193 SmtUtils]: Spent 10.54 s on a formula simplification. DAG size of input: 770 DAG size of output: 516 [2020-07-20 22:44:54,530 WARN L193 SmtUtils]: Spent 10.94 s on a formula simplification that was a NOOP. DAG size: 760 [2020-07-20 22:46:06,376 WARN L193 SmtUtils]: Spent 11.62 s on a formula simplification that was a NOOP. DAG size: 754 [2020-07-20 22:47:21,051 WARN L193 SmtUtils]: Spent 11.94 s on a formula simplification that was a NOOP. DAG size: 748