/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 [2020-07-21 19:46:17,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:46:17,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:46:17,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 19:46:17,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:46:17,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:46:17,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:46:17,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:46:17,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:46:18,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:46:18,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:46:18,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:46:18,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:46:18,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:46:18,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:46:18,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:46:18,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:46:18,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:46:18,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:46:18,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:46:18,020 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 [2020-07-21 19:46:18,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:46:18,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:46:18,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:46:18,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:46:18,040 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:46:18,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:46:18,040 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:46:18,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:46:18,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:46:18,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:46:18,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:46:18,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:46:18,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:46:18,042 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:46:18,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:46:18,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:46:18,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:46:18,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:46:18,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:46:18,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:46:18,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:46:18,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:46:18,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:46:18,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:46:18,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:46:18,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:46:18,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:18,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:46:18,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:46:18,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:46:18,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:46:18,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:46:18,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:46:18,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:46:18,407 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:46:18,407 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-21 19:46:18,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6c50c73/a4c7994e416a440eaef42d4075bb2eae/FLAG1b6ee4743 [2020-07-21 19:46:18,985 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:46:18,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-21 19:46:18,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6c50c73/a4c7994e416a440eaef42d4075bb2eae/FLAG1b6ee4743 [2020-07-21 19:46:19,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6c50c73/a4c7994e416a440eaef42d4075bb2eae [2020-07-21 19:46:19,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:46:19,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:46:19,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:46:19,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:46:19,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:46:19,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49245ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19, skipping insertion in model container [2020-07-21 19:46:19,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:46:19,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:46:19,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:46:19,545 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:46:19,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:46:19,582 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:46:19,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19 WrapperNode [2020-07-21 19:46:19,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:46:19,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:46:19,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:46:19,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:46:19,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (1/1) ... [2020-07-21 19:46:19,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:46:19,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:46:19,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:46:19,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:46:19,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (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 [2020-07-21 19:46:19,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:46:19,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:46:19,797 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 19:46:19,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:46:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:46:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 19:46:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:46:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:46:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:46:19,991 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:46:19,991 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:46:19,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:46:19 BoogieIcfgContainer [2020-07-21 19:46:19,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:46:19,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:46:19,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:46:20,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:46:20,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:46:19" (1/3) ... [2020-07-21 19:46:20,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86cc948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:46:20, skipping insertion in model container [2020-07-21 19:46:20,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:19" (2/3) ... [2020-07-21 19:46:20,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86cc948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:46:20, skipping insertion in model container [2020-07-21 19:46:20,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:46:19" (3/3) ... [2020-07-21 19:46:20,006 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-21 19:46:20,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:46:20,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:46:20,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:46:20,079 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:46:20,080 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:46:20,080 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:46:20,080 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:46:20,080 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:46:20,080 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:46:20,080 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:46:20,081 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:46:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 19:46:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:46:20,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:20,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:20,131 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 19:46:20,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:20,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117806833] [2020-07-21 19:46:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:20,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:46:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:46:20,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:46:20,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117806833] [2020-07-21 19:46:20,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:46:20,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:46:20,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427622151] [2020-07-21 19:46:20,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:46:20,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:46:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:46:20,366 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 19:46:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:20,485 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 19:46:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:46:20,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:46:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:20,498 INFO L225 Difference]: With dead ends: 30 [2020-07-21 19:46:20,498 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 19:46:20,502 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 [2020-07-21 19:46:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 19:46:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 19:46:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 19:46:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 19:46:20,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 19:46:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:20,553 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 19:46:20,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:46:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 19:46:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:46:20,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:20,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:20,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:20,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:20,773 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 19:46:20,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:20,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901804215] [2020-07-21 19:46:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:20,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:20,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:46:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:46:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:21,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:46:21,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901804215] [2020-07-21 19:46:21,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:21,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 19:46:21,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658291056] [2020-07-21 19:46:21,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:46:21,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:46:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:46:21,153 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 19:46:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:21,231 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 19:46:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:46:21,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 19:46:21,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:21,234 INFO L225 Difference]: With dead ends: 25 [2020-07-21 19:46:21,234 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 19:46:21,235 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 [2020-07-21 19:46:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 19:46:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 19:46:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:46:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 19:46:21,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 19:46:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:21,244 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 19:46:21,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:46:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 19:46:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 19:46:21,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:21,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:21,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:21,454 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-21 19:46:21,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:21,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295218952] [2020-07-21 19:46:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:21,507 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:21,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:46:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:46:21,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:21,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:21,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:21,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:21,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:46:21,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295218952] [2020-07-21 19:46:21,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:21,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 19:46:21,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825732223] [2020-07-21 19:46:21,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:46:21,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:46:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:46:21,950 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 19:46:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:22,061 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 19:46:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:46:22,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 19:46:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:22,063 INFO L225 Difference]: With dead ends: 28 [2020-07-21 19:46:22,063 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:46:22,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:46:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:46:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:46:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:46:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 19:46:22,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 19:46:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:22,077 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 19:46:22,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:46:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 19:46:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 19:46:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:22,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:22,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:22,281 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:22,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:22,282 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-21 19:46:22,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:22,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255237900] [2020-07-21 19:46:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:22,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:46:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 19:46:22,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:22,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:22,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:22,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:22,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:22,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:46:22,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255237900] [2020-07-21 19:46:22,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:22,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 19:46:22,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181385711] [2020-07-21 19:46:22,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:46:22,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:46:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:46:22,936 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 19:46:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:23,049 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 19:46:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:46:23,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 19:46:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:23,052 INFO L225 Difference]: With dead ends: 31 [2020-07-21 19:46:23,052 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 19:46:23,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:46:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 19:46:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 19:46:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 19:46:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 19:46:23,070 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 19:46:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:23,071 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 19:46:23,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:46:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 19:46:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 19:46:23,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:23,074 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:23,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:23,277 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-21 19:46:23,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:23,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408933521] [2020-07-21 19:46:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:23,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:23,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:46:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 19:46:23,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:23,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:24,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:24,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:24,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:24,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 19:46:24,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408933521] [2020-07-21 19:46:24,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:24,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 19:46:24,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888123377] [2020-07-21 19:46:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:46:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:46:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:46:24,346 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-21 19:46:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:24,460 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 19:46:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:46:24,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-21 19:46:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:24,466 INFO L225 Difference]: With dead ends: 34 [2020-07-21 19:46:24,466 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:46:24,467 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 [2020-07-21 19:46:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:46:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:46:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:46:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 19:46:24,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 19:46:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:24,474 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 19:46:24,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:46:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 19:46:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 19:46:24,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:24,476 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:24,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:24,687 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-21 19:46:24,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:24,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433497941] [2020-07-21 19:46:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:24,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:46:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 19:46:24,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:25,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:25,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:25,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:26,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:26,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:26,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:26,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 19:46:26,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433497941] [2020-07-21 19:46:26,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:26,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 19:46:26,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957218303] [2020-07-21 19:46:26,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:46:26,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:46:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:46:26,233 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-21 19:46:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:26,413 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 19:46:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:46:26,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-21 19:46:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:26,417 INFO L225 Difference]: With dead ends: 37 [2020-07-21 19:46:26,420 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 19:46:26,422 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 [2020-07-21 19:46:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 19:46:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 19:46:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 19:46:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 19:46:26,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 19:46:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:26,438 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 19:46:26,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:46:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 19:46:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 19:46:26,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:26,444 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:26,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:26,646 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-21 19:46:26,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:26,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333407868] [2020-07-21 19:46:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:26,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:46:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 19:46:26,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:27,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:27,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 19:46:28,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333407868] [2020-07-21 19:46:28,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:28,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 19:46:28,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887605795] [2020-07-21 19:46:28,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:46:28,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:46:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:46:28,863 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-21 19:46:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:29,040 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-21 19:46:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:46:29,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-21 19:46:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:29,042 INFO L225 Difference]: With dead ends: 40 [2020-07-21 19:46:29,042 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 19:46:29,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:46:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 19:46:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 19:46:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 19:46:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 19:46:29,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-21 19:46:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:29,050 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 19:46:29,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:46:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 19:46:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 19:46:29,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:29,052 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:29,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:29,258 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-21 19:46:29,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:29,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7861833] [2020-07-21 19:46:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:29,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:29,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:46:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 19:46:29,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:31,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:31,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:31,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 19:46:32,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7861833] [2020-07-21 19:46:32,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:32,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 19:46:32,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463321687] [2020-07-21 19:46:32,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:46:32,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:46:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:46:32,426 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-21 19:46:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:32,660 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-21 19:46:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:46:32,664 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 19:46:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:32,665 INFO L225 Difference]: With dead ends: 43 [2020-07-21 19:46:32,665 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 19:46:32,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:46:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 19:46:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 19:46:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 19:46:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 19:46:32,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-21 19:46:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:32,675 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 19:46:32,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:46:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 19:46:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 19:46:32,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:32,677 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:32,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:32,884 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:32,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:32,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-21 19:46:32,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:32,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572735722] [2020-07-21 19:46:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:33,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:33,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:46:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 19:46:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:35,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:35,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:35,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:36,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:36,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:36,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:36,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:36,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:36,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:37,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:37,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:37,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:37,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:37,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 19:46:37,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572735722] [2020-07-21 19:46:37,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:37,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 19:46:37,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789849858] [2020-07-21 19:46:37,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:46:37,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:46:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:46:37,306 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-21 19:46:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:37,509 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-21 19:46:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:46:37,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-21 19:46:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:37,512 INFO L225 Difference]: With dead ends: 46 [2020-07-21 19:46:37,512 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:46:37,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:46:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:46:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 19:46:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 19:46:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-21 19:46:37,520 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-21 19:46:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:37,521 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-21 19:46:37,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:46:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-21 19:46:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 19:46:37,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:37,522 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:37,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:37,725 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-21 19:46:37,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:37,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960426021] [2020-07-21 19:46:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:37,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:46:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:37,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:46:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-21 19:46:37,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:40,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:40,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:41,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:42,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:42,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 19:46:43,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960426021] [2020-07-21 19:46:43,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:43,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 19:46:43,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001136546] [2020-07-21 19:46:43,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 19:46:43,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:43,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 19:46:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:46:43,847 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-21 19:46:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:44,059 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-21 19:46:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:46:44,060 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-21 19:46:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:44,062 INFO L225 Difference]: With dead ends: 49 [2020-07-21 19:46:44,063 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 19:46:44,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 19:46:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 19:46:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-21 19:46:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:46:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-21 19:46:44,078 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-21 19:46:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:44,079 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-21 19:46:44,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 19:46:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-21 19:46:44,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 19:46:44,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:44,085 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:44,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:44,302 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-21 19:46:44,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:44,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160410112] [2020-07-21 19:46:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:46:44,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:44,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:44,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-21 19:46:44,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-21 19:46:45,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:50,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:50,151 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:50,152 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:50,153 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:50,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:50,155 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:50,156 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:50,157 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:50,158 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:50,159 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:50,160 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:50,161 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:50,162 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:52,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:52,227 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:52,227 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:52,228 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:52,229 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:52,230 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:46:52,230 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:52,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:52,232 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:52,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:52,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:52,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:52,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:52,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:53,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:53,897 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:53,898 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:53,898 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:53,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:53,900 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:53,900 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:53,902 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:53,903 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:53,904 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:53,905 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:53,906 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:53,907 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:55,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:55,252 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:55,253 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:55,254 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:55,255 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:55,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:55,256 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:46:55,257 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:55,258 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:55,259 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:46:55,260 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:55,261 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:56,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:56,344 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:56,345 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:56,345 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:56,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:56,347 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:56,347 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:56,348 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:56,349 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:56,350 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:56,351 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:56,351 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:56,352 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:57,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:57,175 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:57,176 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,176 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:57,177 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:57,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,178 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,179 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,181 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:57,181 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,182 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:57,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:57,763 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:57,764 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,765 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:57,765 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:57,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,767 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,768 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,769 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:57,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:57,771 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:58,238 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,239 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,239 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,240 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,241 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:46:58,242 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,242 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:58,243 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:46:58,244 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,244 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 19:46:58,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:58,627 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,628 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,628 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,629 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,629 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 19:46:58,630 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,631 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:58,927 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,928 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,929 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 19:46:58,930 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 19:46:58,931 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,933 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,936 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:58,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,938 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 19:46:59,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 19:46:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 19:46:59,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160410112] [2020-07-21 19:46:59,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:59,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 37] total 61 [2020-07-21 19:46:59,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157674160] [2020-07-21 19:46:59,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-21 19:46:59,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-21 19:46:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2020-07-21 19:46:59,142 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 61 states. [2020-07-21 19:47:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:00,268 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-21 19:47:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 19:47:00,269 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 73 [2020-07-21 19:47:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:00,271 INFO L225 Difference]: With dead ends: 52 [2020-07-21 19:47:00,271 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 19:47:00,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1591, Invalid=5051, Unknown=0, NotChecked=0, Total=6642 [2020-07-21 19:47:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 19:47:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 19:47:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 19:47:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-21 19:47:00,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-21 19:47:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:00,286 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-21 19:47:00,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-21 19:47:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-21 19:47:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 19:47:00,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:00,288 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:00,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:00,493 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:00,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-21 19:47:00,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:00,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936735430] [2020-07-21 19:47:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:47:00,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 19:47:00,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 21 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-21 19:47:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:04,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:06,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:07,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:08,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:08,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:08,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:08,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 19:47:09,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936735430] [2020-07-21 19:47:09,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:09,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-21 19:47:09,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970535526] [2020-07-21 19:47:09,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 19:47:09,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:09,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 19:47:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:47:09,903 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-07-21 19:47:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:10,148 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-07-21 19:47:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:47:10,149 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-07-21 19:47:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:10,149 INFO L225 Difference]: With dead ends: 48 [2020-07-21 19:47:10,150 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:47:10,151 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 [2020-07-21 19:47:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:47:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:47:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:47:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:47:10,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-21 19:47:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:10,152 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:47:10,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 19:47:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:47:10,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:47:10,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:10,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:47:10,439 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:47:10,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:47:10,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:47:10,439 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:47:10,440 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:47:10,440 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:47:10,440 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-21 19:47:10,440 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)) [2020-07-21 19:47:10,440 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-21 19:47:10,440 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-21 19:47:10,440 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-21 19:47:10,440 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-21 19:47:10,441 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 19:47:10,441 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 19:47:10,441 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 19:47:10,441 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 19:47:10,441 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 19:47:10,441 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-07-21 19:47:10,442 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 19:47:10,442 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 19:47:10,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:47:10 BoogieIcfgContainer [2020-07-21 19:47:10,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:47:10,450 INFO L168 Benchmark]: Toolchain (without parser) took 51124.30 ms. Allocated memory was 141.6 MB in the beginning and 504.9 MB in the end (delta: 363.3 MB). Free memory was 99.7 MB in the beginning and 358.8 MB in the end (delta: -259.1 MB). Peak memory consumption was 104.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:47:10,451 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 117.7 MB in the beginning and 117.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 19:47:10,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.03 ms. Allocated memory is still 141.6 MB. Free memory was 99.3 MB in the beginning and 89.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 19:47:10,453 INFO L168 Benchmark]: Boogie Preprocessor took 32.45 ms. Allocated memory is still 141.6 MB. Free memory was 89.6 MB in the beginning and 88.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:47:10,454 INFO L168 Benchmark]: RCFGBuilder took 379.24 ms. Allocated memory was 141.6 MB in the beginning and 198.7 MB in the end (delta: 57.1 MB). Free memory was 88.3 MB in the beginning and 166.4 MB in the end (delta: -78.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:47:10,455 INFO L168 Benchmark]: TraceAbstraction took 50450.45 ms. Allocated memory was 198.7 MB in the beginning and 504.9 MB in the end (delta: 306.2 MB). Free memory was 165.6 MB in the beginning and 358.8 MB in the end (delta: -193.2 MB). Peak memory consumption was 113.0 MB. Max. memory is 7.1 GB. [2020-07-21 19:47:10,462 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 117.7 MB in the beginning and 117.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.03 ms. Allocated memory is still 141.6 MB. Free memory was 99.3 MB in the beginning and 89.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.45 ms. Allocated memory is still 141.6 MB. Free memory was 89.6 MB in the beginning and 88.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.24 ms. Allocated memory was 141.6 MB in the beginning and 198.7 MB in the end (delta: 57.1 MB). Free memory was 88.3 MB in the beginning and 166.4 MB in the end (delta: -78.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50450.45 ms. Allocated memory was 198.7 MB in the beginning and 504.9 MB in the end (delta: 306.2 MB). Free memory was 165.6 MB in the beginning and 358.8 MB in the end (delta: -193.2 MB). Peak memory consumption was 113.0 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: 50.2s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 602 SDslu, 1014 SDs, 0 SdLazy, 776 SolverSat, 314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1177 GetRequests, 737 SyntacticMatches, 133 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 7.4s 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, 0.2s SatisfiabilityAnalysisTime, 43.2s InterpolantComputationTime, 552 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1068 ConstructedInterpolants, 0 QuantifiedInterpolants, 274896 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1331 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...