/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:39:34,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:39:34,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:39:34,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:39:34,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:39:34,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:39:34,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:39:34,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:39:34,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:39:34,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:39:34,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:39:34,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:39:34,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:39:34,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:39:34,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:39:34,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:39:34,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:39:34,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:39:34,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:39:34,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:39:34,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:39:34,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:39:34,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:39:34,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:39:34,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:39:34,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:39:34,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:39:34,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:39:34,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:39:34,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:39:34,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:39:34,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:39:34,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:39:34,409 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:39:34,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:39:34,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:39:34,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:39:34,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:39:34,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:39:34,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:39:34,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:39:34,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:39:34,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:39:34,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:39:34,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:39:34,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:39:34,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:39:34,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:39:34,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:39:34,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:39:34,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:39:34,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:39:34,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:39:34,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:39:34,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:39:34,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:34,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:39:34,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:39:34,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:39:34,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:39:34,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:39:34,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:39:34,815 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:39:34,815 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:39:34,817 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 13:39:34,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c073adec2/81dda90ecbcf4fbda85604eae6729ad0/FLAG494b727a8 [2020-07-20 13:39:35,478 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:39:35,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 13:39:35,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c073adec2/81dda90ecbcf4fbda85604eae6729ad0/FLAG494b727a8 [2020-07-20 13:39:35,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c073adec2/81dda90ecbcf4fbda85604eae6729ad0 [2020-07-20 13:39:35,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:39:35,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:39:35,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:39:35,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:39:35,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:39:35,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:39:35" (1/1) ... [2020-07-20 13:39:35,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15dffb7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:35, skipping insertion in model container [2020-07-20 13:39:35,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:39:35" (1/1) ... [2020-07-20 13:39:35,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:39:35,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:39:36,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:39:36,033 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:39:36,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:39:36,065 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:39:36,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36 WrapperNode [2020-07-20 13:39:36,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:39:36,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:39:36,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:39:36,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:39:36,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (1/1) ... [2020-07-20 13:39:36,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:39:36,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:39:36,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:39:36,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:39:36,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (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 13:39:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:39:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:39:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 13:39:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:39:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:39:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 13:39:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:39:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:39:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:39:36,538 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:39:36,539 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:39:36,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:39:36 BoogieIcfgContainer [2020-07-20 13:39:36,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:39:36,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:39:36,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:39:36,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:39:36,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:39:35" (1/3) ... [2020-07-20 13:39:36,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdf20fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:39:36, skipping insertion in model container [2020-07-20 13:39:36,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:39:36" (2/3) ... [2020-07-20 13:39:36,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdf20fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:39:36, skipping insertion in model container [2020-07-20 13:39:36,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:39:36" (3/3) ... [2020-07-20 13:39:36,602 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-20 13:39:36,643 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:39:36,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:39:36,707 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:39:36,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:39:36,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:39:36,741 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:39:36,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:39:36,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:39:36,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:39:36,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:39:36,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:39:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 13:39:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:39:36,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:36,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:39:36,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:36,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 13:39:36,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:36,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845305565] [2020-07-20 13:39:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:36,901 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:39:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:39:37,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:39:37,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845305565] [2020-07-20 13:39:37,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:39:37,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:39:37,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379208928] [2020-07-20 13:39:37,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:39:37,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:39:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:39:37,057 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 13:39:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:37,182 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 13:39:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:39:37,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:39:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:37,196 INFO L225 Difference]: With dead ends: 30 [2020-07-20 13:39:37,197 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 13:39:37,201 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 13:39:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 13:39:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 13:39:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 13:39:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 13:39:37,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 13:39:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:37,268 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 13:39:37,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:39:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 13:39:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:39:37,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:37,272 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 13:39:37,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:37,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 13:39:37,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:37,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42689748] [2020-07-20 13:39:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:37,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:37,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:39:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:39:37,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:37,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:39:37,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42689748] [2020-07-20 13:39:37,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:37,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:39:37,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143822218] [2020-07-20 13:39:37,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:39:37,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:39:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:39:37,929 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 13:39:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:38,045 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 13:39:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:39:38,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 13:39:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:38,048 INFO L225 Difference]: With dead ends: 25 [2020-07-20 13:39:38,049 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 13:39:38,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:39:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 13:39:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 13:39:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:39:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 13:39:38,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 13:39:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:38,061 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 13:39:38,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:39:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 13:39:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:39:38,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:38,063 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 13:39:38,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:38,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 13:39:38,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:38,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412796772] [2020-07-20 13:39:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:38,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:39:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:38,409 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 13:39:38,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:38,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:38,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:38,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:38,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:38,908 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 13:39:38,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412796772] [2020-07-20 13:39:38,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:38,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:39:38,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753205043] [2020-07-20 13:39:38,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:39:38,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:39:38,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:39:38,918 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 13:39:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:39,069 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 13:39:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:39:39,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 13:39:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:39,073 INFO L225 Difference]: With dead ends: 28 [2020-07-20 13:39:39,074 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 13:39:39,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:39:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 13:39:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 13:39:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 13:39:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 13:39:39,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 13:39:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:39,104 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 13:39:39,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:39:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 13:39:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 13:39:39,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:39,107 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 13:39:39,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:39,321 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:39,322 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 13:39:39,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:39,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908758191] [2020-07-20 13:39:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:39,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:39,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:39:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:39,438 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 13:39:39,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:39,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:39,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:40,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:40,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:40,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:40,203 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 13:39:40,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908758191] [2020-07-20 13:39:40,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:40,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:39:40,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626677710] [2020-07-20 13:39:40,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:39:40,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:40,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:39:40,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:39:40,209 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 13:39:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:40,347 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 13:39:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:39:40,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 13:39:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:40,350 INFO L225 Difference]: With dead ends: 31 [2020-07-20 13:39:40,350 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 13:39:40,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:39:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 13:39:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 13:39:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:39:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 13:39:40,359 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 13:39:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:40,359 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 13:39:40,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:39:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 13:39:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 13:39:40,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:40,362 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 13:39:40,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:40,568 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 13:39:40,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:40,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780740489] [2020-07-20 13:39:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:40,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:40,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:39:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:40,718 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 13:39:40,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:41,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:41,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:41,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:41,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:41,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:41,812 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 13:39:41,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780740489] [2020-07-20 13:39:41,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:41,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:39:41,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94740877] [2020-07-20 13:39:41,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:39:41,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:39:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:39:41,816 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-20 13:39:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:41,964 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 13:39:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:39:41,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-20 13:39:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:41,972 INFO L225 Difference]: With dead ends: 34 [2020-07-20 13:39:41,972 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:39:41,973 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 13:39:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:39:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 13:39:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:39:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 13:39:41,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 13:39:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:41,981 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 13:39:41,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:39:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 13:39:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 13:39:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:41,983 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 13:39:42,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:42,185 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:42,186 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 13:39:42,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:42,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936480795] [2020-07-20 13:39:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:42,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:42,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:39:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:42,350 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 13:39:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:43,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:43,971 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 13:39:43,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936480795] [2020-07-20 13:39:43,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:43,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 13:39:43,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37801223] [2020-07-20 13:39:43,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:39:43,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:39:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:39:43,975 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-20 13:39:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:44,168 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 13:39:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:39:44,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-20 13:39:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:44,173 INFO L225 Difference]: With dead ends: 37 [2020-07-20 13:39:44,173 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 13:39:44,177 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 13:39:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 13:39:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 13:39:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 13:39:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 13:39:44,186 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 13:39:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:44,187 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 13:39:44,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:39:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 13:39:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 13:39:44,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:44,190 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 13:39:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:44,392 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 13:39:44,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:44,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867633099] [2020-07-20 13:39:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:44,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:44,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:44,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:39:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:44,586 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 13:39:44,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:45,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:45,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:46,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:46,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:46,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:46,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:46,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:46,944 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 13:39:46,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867633099] [2020-07-20 13:39:46,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:46,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 13:39:46,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297665440] [2020-07-20 13:39:46,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:39:46,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:39:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:39:46,952 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-20 13:39:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:47,164 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 13:39:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:39:47,164 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-20 13:39:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:47,167 INFO L225 Difference]: With dead ends: 40 [2020-07-20 13:39:47,167 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 13:39:47,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:39:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 13:39:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 13:39:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:39:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 13:39:47,176 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 13:39:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:47,177 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 13:39:47,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:39:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 13:39:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 13:39:47,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:47,179 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 13:39:47,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:47,387 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 13:39:47,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:47,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224461771] [2020-07-20 13:39:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:47,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:39:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:47,585 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 13:39:47,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:49,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:49,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:50,887 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 13:39:50,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224461771] [2020-07-20 13:39:50,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:50,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 13:39:50,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020172084] [2020-07-20 13:39:50,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:39:50,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:39:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:39:50,890 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-20 13:39:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:51,135 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 13:39:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:39:51,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 13:39:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:51,140 INFO L225 Difference]: With dead ends: 43 [2020-07-20 13:39:51,140 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 13:39:51,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:39:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 13:39:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 13:39:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 13:39:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 13:39:51,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 13:39:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:51,149 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 13:39:51,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:39:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 13:39:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 13:39:51,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:51,151 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 13:39:51,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:51,358 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 13:39:51,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:51,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079792583] [2020-07-20 13:39:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:51,480 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:39:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:51,611 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 13:39:51,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:39:53,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:53,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:54,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:55,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:55,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:55,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:55,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:55,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:55,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:56,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:56,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:56,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:56,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:56,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:56,411 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 13:39:56,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079792583] [2020-07-20 13:39:56,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:39:56,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 13:39:56,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107851902] [2020-07-20 13:39:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 13:39:56,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:39:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 13:39:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:39:56,416 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-20 13:39:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:39:56,736 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 13:39:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:39:56,737 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-20 13:39:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:39:56,740 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:39:56,741 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:39:56,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 13:39:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:39:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 13:39:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 13:39:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 13:39:56,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 13:39:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:39:56,752 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 13:39:56,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 13:39:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 13:39:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 13:39:56,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:39:56,767 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 13:39:56,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:56,973 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:39:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:39:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 13:39:56,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:39:56,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997046414] [2020-07-20 13:39:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:39:57,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:39:57,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:39:57,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:39:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:39:57,297 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 13:39:57,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:40:00,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:00,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:01,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:02,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:03,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:03,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:03,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:03,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:04,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:04,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:04,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:04,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:04,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:04,338 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 13:40:04,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997046414] [2020-07-20 13:40:04,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:40:04,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 13:40:04,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657207765] [2020-07-20 13:40:04,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:40:04,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:40:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:40:04,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:40:04,342 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-20 13:40:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:40:04,627 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 13:40:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:40:04,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-20 13:40:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:40:04,630 INFO L225 Difference]: With dead ends: 49 [2020-07-20 13:40:04,631 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 13:40:04,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 13:40:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 13:40:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 13:40:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:40:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 13:40:04,640 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 13:40:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:40:04,641 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 13:40:04,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:40:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 13:40:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 13:40:04,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:40:04,643 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 13:40:04,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:40:04,850 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:40:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:40:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 13:40:04,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:40:04,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289392734] [2020-07-20 13:40:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:40:05,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:40:05,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:40:05,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-20 13:40:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:40:05,870 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 13:40:05,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:40:11,185 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 13:40:11,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:12,008 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:12,009 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:12,010 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:12,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:12,014 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:12,015 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:12,017 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:12,019 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:12,021 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:12,022 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:12,024 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:12,025 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:14,088 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 13:40:14,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:14,776 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:14,777 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:14,778 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:14,779 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:14,779 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 13:40:14,780 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:14,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:14,783 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:14,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:14,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:14,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:14,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:14,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:16,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:16,847 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:16,847 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:16,848 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:16,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:16,850 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:16,851 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:16,853 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:16,854 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:16,860 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:16,862 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:16,863 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:16,866 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:18,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:18,547 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:18,548 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:18,550 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:18,551 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:18,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:18,553 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 13:40:18,554 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:18,556 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:18,557 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 13:40:18,558 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:18,559 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:19,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:19,897 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:19,898 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:19,899 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:19,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:19,901 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:19,902 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:19,904 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:19,905 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:19,906 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:19,908 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:19,908 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:19,909 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:20,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:20,880 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:20,881 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:20,882 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:20,883 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:20,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:20,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:20,885 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:20,885 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:20,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:20,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:20,888 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:20,888 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:20,889 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:20,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:21,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:21,630 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:21,631 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:21,632 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:21,633 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:21,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,634 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:21,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,636 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:21,638 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:21,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,641 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:22,217 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:22,218 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,219 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:22,219 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:22,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,221 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 13:40:22,221 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,222 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:22,223 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 13:40:22,224 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,225 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 13:40:22,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:22,684 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:22,685 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:22,686 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:22,686 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,687 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 13:40:22,687 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,688 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:22,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:23,000 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:23,002 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:23,003 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:40:23,004 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 13:40:23,005 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:23,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:23,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:23,007 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:23,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:23,010 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:23,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:23,012 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:40:23,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:40:23,208 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 13:40:23,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289392734] [2020-07-20 13:40:23,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:40:23,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 37] total 61 [2020-07-20 13:40:23,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468662303] [2020-07-20 13:40:23,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 13:40:23,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:40:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 13:40:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 13:40:23,216 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 61 states. [2020-07-20 13:40:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:40:24,257 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 13:40:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 13:40:24,258 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 73 [2020-07-20 13:40:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:40:24,260 INFO L225 Difference]: With dead ends: 52 [2020-07-20 13:40:24,260 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 13:40:24,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1591, Invalid=5051, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 13:40:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 13:40:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 13:40:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 13:40:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 13:40:24,269 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 13:40:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:40:24,269 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 13:40:24,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 13:40:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 13:40:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 13:40:24,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:40:24,271 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 13:40:24,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:40:24,475 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:40:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:40:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 13:40:24,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:40:24,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561129340] [2020-07-20 13:40:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:40:24,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:40:24,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:40:24,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:40:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:40:24,906 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 13:40:24,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:40:28,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:30,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:31,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:32,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:32,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:32,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:32,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:33,700 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 13:40:33,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561129340] [2020-07-20 13:40:33,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:40:33,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-20 13:40:33,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900155827] [2020-07-20 13:40:33,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 13:40:33,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:40:33,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 13:40:33,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:40:33,702 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-07-20 13:40:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:40:33,949 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-07-20 13:40:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:40:33,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-07-20 13:40:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:40:33,951 INFO L225 Difference]: With dead ends: 48 [2020-07-20 13:40:33,952 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:40:33,953 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 13:40:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:40:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:40:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:40:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:40:33,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-20 13:40:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:40:33,955 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:40:33,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 13:40:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:40:33,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:40:34,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:40:34,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:40:34,251 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:40:34,251 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:40:34,252 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:40:34,252 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:40:34,252 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:40:34,252 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:40:34,252 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 13:40:34,252 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 13:40:34,253 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 13:40:34,253 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 13:40:34,253 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 13:40:34,253 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 13:40:34,253 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 13:40:34,253 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 13:40:34,254 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 13:40:34,254 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 13:40:34,254 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 13:40:34,254 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 13:40:34,254 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 13:40:34,254 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 13:40:34,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:40:34 BoogieIcfgContainer [2020-07-20 13:40:34,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:40:34,263 INFO L168 Benchmark]: Toolchain (without parser) took 58487.21 ms. Allocated memory was 143.7 MB in the beginning and 479.2 MB in the end (delta: 335.5 MB). Free memory was 102.2 MB in the beginning and 120.7 MB in the end (delta: -18.6 MB). Peak memory consumption was 317.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:40:34,264 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:40:34,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.34 ms. Allocated memory is still 143.7 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:40:34,265 INFO L168 Benchmark]: Boogie Preprocessor took 34.94 ms. Allocated memory is still 143.7 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:40:34,266 INFO L168 Benchmark]: RCFGBuilder took 454.32 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 91.2 MB in the beginning and 169.9 MB in the end (delta: -78.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:40:34,267 INFO L168 Benchmark]: TraceAbstraction took 57698.43 ms. Allocated memory was 201.9 MB in the beginning and 479.2 MB in the end (delta: 277.3 MB). Free memory was 169.2 MB in the beginning and 120.7 MB in the end (delta: 48.5 MB). Peak memory consumption was 325.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:40:34,270 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.34 ms. Allocated memory is still 143.7 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.94 ms. Allocated memory is still 143.7 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 454.32 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 91.2 MB in the beginning and 169.9 MB in the end (delta: -78.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 57698.43 ms. Allocated memory was 201.9 MB in the beginning and 479.2 MB in the end (delta: 277.3 MB). Free memory was 169.2 MB in the beginning and 120.7 MB in the end (delta: 48.5 MB). Peak memory consumption was 325.8 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: 57.4s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 3.3s, 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, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1177 GetRequests, 737 SyntacticMatches, 133 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 8.6s 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: 0.1s 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, 0.3s SatisfiabilityAnalysisTime, 49.9s InterpolantComputationTime, 552 NumberOfCodeBlocks, 343 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1068 ConstructedInterpolants, 0 QuantifiedInterpolants, 274896 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1309 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...