/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/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:45:47,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:45:47,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:45:47,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:45:47,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:45:47,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:45:47,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:45:47,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:45:47,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:45:47,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:45:47,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:45:47,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:45:47,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:45:47,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:45:47,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:45:47,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:45:47,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:45:47,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:45:47,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:45:47,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:45:47,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:45:47,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:45:47,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:45:47,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:45:47,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:45:47,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:45:47,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:45:47,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:45:47,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:45:47,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:45:47,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:45:47,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:45:47,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:45:47,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:45:47,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:45:47,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:45:47,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:45:47,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:45:47,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:45:47,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:45:47,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:45:47,398 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 19:45:47,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:45:47,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:45:47,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:45:47,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:45:47,417 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:45:47,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:45:47,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:45:47,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:45:47,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:45:47,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:45:47,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:45:47,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:45:47,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:45:47,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:45:47,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:45:47,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:45:47,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:45:47,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:45:47,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:45:47,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:45:47,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:45:47,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:45:47,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:45:47,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:45:47,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:45:47,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:45:47,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:47,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:45:47,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:45:47,422 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 19:45:47,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:45:47,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:45:47,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:45:47,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:45:47,782 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:45:47,783 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-21 19:45:47,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aca8d03f/ca26a8f2a04347638a09fc8869935dfa/FLAG4b9417f30 [2020-07-21 19:45:48,437 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:45:48,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-21 19:45:48,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aca8d03f/ca26a8f2a04347638a09fc8869935dfa/FLAG4b9417f30 [2020-07-21 19:45:48,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aca8d03f/ca26a8f2a04347638a09fc8869935dfa [2020-07-21 19:45:48,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:45:48,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:45:48,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:45:48,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:45:48,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:45:48,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:45:48" (1/1) ... [2020-07-21 19:45:48,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266b387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:48, skipping insertion in model container [2020-07-21 19:45:48,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:45:48" (1/1) ... [2020-07-21 19:45:48,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:45:48,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:45:49,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:45:49,064 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:45:49,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:45:49,104 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:45:49,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49 WrapperNode [2020-07-21 19:45:49,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:45:49,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:45:49,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:45:49,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:45:49,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (1/1) ... [2020-07-21 19:45:49,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:45:49,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:45:49,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:45:49,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:45:49,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (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 19:45:49,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:45:49,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:45:49,314 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 19:45:49,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:45:49,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 19:45:49,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:45:49,315 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 19:45:49,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:45:49,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:45:49,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:45:49,519 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:45:49,519 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:45:49,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:45:49 BoogieIcfgContainer [2020-07-21 19:45:49,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:45:49,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:45:49,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:45:49,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:45:49,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:45:48" (1/3) ... [2020-07-21 19:45:49,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463c2fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:45:49, skipping insertion in model container [2020-07-21 19:45:49,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:45:49" (2/3) ... [2020-07-21 19:45:49,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463c2fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:45:49, skipping insertion in model container [2020-07-21 19:45:49,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:45:49" (3/3) ... [2020-07-21 19:45:49,536 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-07-21 19:45:49,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:45:49,560 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:45:49,578 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:45:49,623 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:45:49,624 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:45:49,625 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:45:49,625 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:45:49,626 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:45:49,626 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:45:49,627 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:45:49,627 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:45:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 19:45:49,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:45:49,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:49,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:49,665 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 19:45:49,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:49,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007056742] [2020-07-21 19:45:49,681 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 19:45:49,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:45:49,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:45:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:49,869 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 19:45:49,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:45:49,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007056742] [2020-07-21 19:45:49,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:45:49,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:45:49,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072307973] [2020-07-21 19:45:49,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:45:49,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:45:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:45:49,918 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 19:45:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:49,991 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 19:45:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:45:49,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:45:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:50,009 INFO L225 Difference]: With dead ends: 32 [2020-07-21 19:45:50,009 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 19:45:50,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:45:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 19:45:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 19:45:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 19:45:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 19:45:50,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 19:45:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:50,099 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 19:45:50,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:45:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 19:45:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:45:50,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:50,111 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 19:45:50,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:50,328 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 19:45:50,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:50,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902857816] [2020-07-21 19:45:50,331 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 19:45:50,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:50,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:45:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:50,457 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 19:45:50,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:50,688 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 19:45:50,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902857816] [2020-07-21 19:45:50,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:50,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 19:45:50,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904741298] [2020-07-21 19:45:50,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:45:50,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:45:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:45:50,695 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-21 19:45:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:50,762 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-21 19:45:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:45:50,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-21 19:45:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:50,765 INFO L225 Difference]: With dead ends: 30 [2020-07-21 19:45:50,766 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:45:50,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:45:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:45:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:45:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:45:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 19:45:50,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-21 19:45:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:50,777 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 19:45:50,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:45:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 19:45:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 19:45:50,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:50,780 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 19:45:50,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:50,996 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-21 19:45:50,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:50,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667419125] [2020-07-21 19:45:50,999 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 19:45:51,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:51,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:45:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:51,201 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 19:45:51,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:51,738 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 19:45:51,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667419125] [2020-07-21 19:45:51,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:51,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 19:45:51,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299800463] [2020-07-21 19:45:51,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:45:51,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:51,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:45:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:45:51,743 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-21 19:45:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:52,189 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 19:45:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 19:45:52,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-21 19:45:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:52,192 INFO L225 Difference]: With dead ends: 42 [2020-07-21 19:45:52,192 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 19:45:52,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:45:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 19:45:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 19:45:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 19:45:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 19:45:52,203 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-21 19:45:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:52,204 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 19:45:52,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:45:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 19:45:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 19:45:52,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:52,207 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 19:45:52,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:52,422 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-21 19:45:52,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:52,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707275165] [2020-07-21 19:45:52,424 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 19:45:52,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:52,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:52,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-21 19:45:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:52,765 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 19:45:52,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:54,284 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 19:45:54,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707275165] [2020-07-21 19:45:54,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:54,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 19:45:54,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133318265] [2020-07-21 19:45:54,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 19:45:54,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 19:45:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:45:54,289 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-21 19:45:57,076 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:45:57,663 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:45:58,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:45:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:59,470 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-21 19:45:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 19:45:59,473 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-21 19:45:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:59,475 INFO L225 Difference]: With dead ends: 66 [2020-07-21 19:45:59,475 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 19:45:59,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 19:45:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 19:45:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 19:45:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:45:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 19:45:59,488 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-21 19:45:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:59,488 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 19:45:59,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 19:45:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 19:45:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 19:45:59,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:59,492 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:59,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:59,707 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-21 19:45:59,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:59,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990456746] [2020-07-21 19:45:59,710 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 19:45:59,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 19:45:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 19:46:00,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 332 refuted. 13 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 19:46:33,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990456746] [2020-07-21 19:46:33,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:33,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 19:46:33,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179828802] [2020-07-21 19:46:33,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 19:46:33,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 19:46:33,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3927, Unknown=13, NotChecked=0, Total=4556 [2020-07-21 19:46:33,226 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-21 19:46:42,083 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-21 19:46:50,013 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 19:46:55,743 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-21 19:47:01,030 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 19:47:06,570 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-21 19:47:12,313 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 19:47:14,379 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ |c_id_#t~ret0| 8) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 7) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 3) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 6) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 1) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 4) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 12) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 2) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 5) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 9) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 11) 4294967296) 200) (< (mod (+ |c_id_#t~ret0| 10) 4294967296) 200)) is different from false [2020-07-21 19:47:19,642 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 19:47:24,610 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 19:47:31,948 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 19:47:38,158 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 19:47:44,652 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 19:47:46,569 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 19:47:49,299 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 19:47:53,868 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-21 19:48:00,367 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 19:48:04,257 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 19:48:08,038 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 19:48:11,128 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 19:48:27,318 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 19:48:36,746 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2020-07-21 19:48:44,116 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 19:48:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:51,196 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-21 19:48:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-21 19:48:51,197 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-21 19:48:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:51,200 INFO L225 Difference]: With dead ends: 114 [2020-07-21 19:48:51,201 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 19:48:51,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 167.9s TimeCoverageRelationStatistics Valid=1485, Invalid=7424, Unknown=25, NotChecked=186, Total=9120 [2020-07-21 19:48:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 19:48:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 19:48:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 19:48:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-21 19:48:51,222 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-21 19:48:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:51,222 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-21 19:48:51,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 19:48:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-21 19:48:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 19:48:51,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:51,233 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:51,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:51,443 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-21 19:48:51,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:51,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863464914] [2020-07-21 19:48:51,445 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 19:48:51,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 132 conjunts are in the unsatisfiable core [2020-07-21 19:48:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 19:48:55,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 19:49:26,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863464914] [2020-07-21 19:49:26,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:26,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 19:49:26,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582410765] [2020-07-21 19:49:26,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 19:49:26,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 19:49:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=15044, Unknown=0, NotChecked=0, Total=17292 [2020-07-21 19:49:26,592 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-21 19:52:40,250 WARN L193 SmtUtils]: Spent 1.98 m on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 19:55:44,044 WARN L193 SmtUtils]: Spent 2.02 m on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:58:42,918 WARN L193 SmtUtils]: Spent 1.87 m on a formula simplification that was a NOOP. DAG size: 183