/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:59:12,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:59:12,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:59:12,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 00:59:12,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:59:12,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:59:12,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:59:12,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:59:12,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:59:12,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:59:12,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:59:13,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:59:13,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:59:13,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:59:13,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:59:13,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:59:13,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:59:13,033 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 00:59:13,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:59:13,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:59:13,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:59:13,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:59:13,052 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:59:13,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:59:13,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:59:13,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:59:13,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:59:13,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:59:13,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:59:13,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:59:13,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:59:13,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:59:13,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:59:13,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:59:13,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:59:13,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:59:13,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:59:13,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:59:13,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:59:13,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:59:13,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:59:13,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:59:13,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:59:13,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:59:13,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:13,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:59:13,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:59:13,057 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:59:13,370 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:59:13,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:59:13,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:59:13,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:59:13,407 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:59:13,408 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-07-21 00:59:13,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb883abf5/ea6a96bc38714e8e9ab360b9f508214d/FLAGe8da73ed0 [2020-07-21 00:59:14,021 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:59:14,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-07-21 00:59:14,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb883abf5/ea6a96bc38714e8e9ab360b9f508214d/FLAGe8da73ed0 [2020-07-21 00:59:14,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb883abf5/ea6a96bc38714e8e9ab360b9f508214d [2020-07-21 00:59:14,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:59:14,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:59:14,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:14,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:59:14,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:59:14,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f255fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14, skipping insertion in model container [2020-07-21 00:59:14,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:59:14,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:59:14,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:59:14,628 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:59:14,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:59:14,668 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:59:14,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14 WrapperNode [2020-07-21 00:59:14,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:14,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:59:14,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:59:14,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:59:14,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (1/1) ... [2020-07-21 00:59:14,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:59:14,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:59:14,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:59:14,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:59:14,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (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 00:59:14,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:59:14,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:59:14,953 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 00:59:14,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:59:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 00:59:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:59:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 00:59:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:59:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:59:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:59:15,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:59:15,169 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:59:15,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:59:15 BoogieIcfgContainer [2020-07-21 00:59:15,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:59:15,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:59:15,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:59:15,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:59:15,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:59:14" (1/3) ... [2020-07-21 00:59:15,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab23347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:59:15, skipping insertion in model container [2020-07-21 00:59:15,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:14" (2/3) ... [2020-07-21 00:59:15,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab23347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:59:15, skipping insertion in model container [2020-07-21 00:59:15,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:59:15" (3/3) ... [2020-07-21 00:59:15,184 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2020-07-21 00:59:15,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:59:15,201 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:59:15,215 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:59:15,246 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:59:15,246 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:59:15,247 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:59:15,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:59:15,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:59:15,247 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:59:15,248 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:59:15,248 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:59:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 00:59:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:59:15,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:15,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:59:15,278 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:15,286 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 00:59:15,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:15,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995572530] [2020-07-21 00:59:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:15,406 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:59:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:59:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:15,504 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 00:59:15,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:59:15,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995572530] [2020-07-21 00:59:15,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:59:15,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:59:15,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958782487] [2020-07-21 00:59:15,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:59:15,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:59:15,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:59:15,531 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 00:59:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:15,583 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 00:59:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:59:15,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:59:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:15,596 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:59:15,596 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 00:59:15,599 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 00:59:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 00:59:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 00:59:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 00:59:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 00:59:15,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 00:59:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:15,644 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 00:59:15,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:59:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 00:59:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:59:15,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:15,647 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 00:59:15,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:15,860 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 00:59:15,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:15,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216862503] [2020-07-21 00:59:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:15,901 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:15,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:59:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:15,967 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 00:59:15,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:16,171 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 00:59:16,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216862503] [2020-07-21 00:59:16,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:16,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 00:59:16,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913303283] [2020-07-21 00:59:16,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:59:16,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:59:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:59:16,176 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-21 00:59:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:18,331 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-21 00:59:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:59:18,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-21 00:59:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:18,333 INFO L225 Difference]: With dead ends: 30 [2020-07-21 00:59:18,334 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:59:18,335 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 00:59:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:59:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 00:59:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:59:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 00:59:18,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-21 00:59:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:18,346 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 00:59:18,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:59:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 00:59:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 00:59:18,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:18,348 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 00:59:18,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:18,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-21 00:59:18,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:18,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351484705] [2020-07-21 00:59:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:18,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:18,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:59:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:18,754 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 00:59:18,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:19,381 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 00:59:19,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351484705] [2020-07-21 00:59:19,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:19,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 00:59:19,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356644390] [2020-07-21 00:59:19,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:59:19,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:59:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:59:19,386 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-21 00:59:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:21,928 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 00:59:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 00:59:21,930 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-21 00:59:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:21,932 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:59:21,932 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 00:59:21,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=98, Invalid=453, Unknown=1, NotChecked=0, Total=552 [2020-07-21 00:59:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 00:59:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 00:59:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:59:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 00:59:21,943 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-21 00:59:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:21,944 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 00:59:21,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:59:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 00:59:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 00:59:21,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:21,946 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 00:59:22,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:22,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-21 00:59:22,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:22,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705418574] [2020-07-21 00:59:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:22,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:22,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 00:59:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:22,481 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 00:59:22,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 73 refuted. 4 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 00:59:32,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705418574] [2020-07-21 00:59:32,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:32,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 00:59:32,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28011777] [2020-07-21 00:59:32,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 00:59:32,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:32,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 00:59:32,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1072, Unknown=4, NotChecked=0, Total=1260 [2020-07-21 00:59:32,513 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-21 00:59:33,202 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 00:59:35,910 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 00:59:38,798 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 00:59:43,967 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-21 00:59:46,351 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 00:59:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:57,834 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-21 00:59:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 00:59:57,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-21 00:59:57,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:57,837 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:59:57,837 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 00:59:57,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=381, Invalid=1868, Unknown=7, NotChecked=0, Total=2256 [2020-07-21 00:59:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 00:59:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 00:59:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:59:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 00:59:57,856 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-21 00:59:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:57,856 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 00:59:57,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 00:59:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 00:59:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 00:59:57,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:57,865 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 00:59:58,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:58,067 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:58,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-21 00:59:58,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:58,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42024333] [2020-07-21 00:59:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:01,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:00:01,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 01:00:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:02,765 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 01:00:02,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 337 refuted. 8 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 01:00:23,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42024333] [2020-07-21 01:00:23,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:23,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 01:00:23,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993479344] [2020-07-21 01:00:23,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 01:00:23,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 01:00:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3933, Unknown=7, NotChecked=0, Total=4556 [2020-07-21 01:00:23,171 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-21 01:00:28,939 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-21 01:00:34,459 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 01:00:40,042 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-21 01:00:45,022 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 01:00:50,472 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-21 01:00:54,032 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 01:00:59,456 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-21 01:01:06,609 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 01:01:09,980 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 01:01:16,132 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 01:01:23,210 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 01:01:29,518 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 01:01:35,876 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 01:01:42,449 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 01:01:48,201 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-21 01:01:52,285 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 01:01:59,728 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 01:02:09,759 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 01:02:13,447 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 01:02:28,322 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 01:02:33,486 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2020-07-21 01:02:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:02:45,751 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-21 01:02:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-21 01:02:45,751 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-21 01:02:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:02:45,754 INFO L225 Difference]: With dead ends: 114 [2020-07-21 01:02:45,755 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 01:02:45,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 160.1s TimeCoverageRelationStatistics Valid=1525, Invalid=7583, Unknown=12, NotChecked=0, Total=9120 [2020-07-21 01:02:45,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 01:02:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 01:02:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 01:02:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-21 01:02:45,780 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-21 01:02:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:02:45,781 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-21 01:02:45,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 01:02:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-21 01:02:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 01:02:45,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:02:45,786 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 01:02:45,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:02:45,988 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:02:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:02:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-21 01:02:45,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:02:45,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940416860] [2020-07-21 01:02:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:03:54,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:03:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:03:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-21 01:03:54,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:03:59,028 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 01:03:59,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:06:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1410 refuted. 47 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 01:06:16,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940416860] [2020-07-21 01:06:16,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:06:16,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 01:06:16,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668114251] [2020-07-21 01:06:16,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 01:06:16,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:06:16,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 01:06:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=14997, Unknown=47, NotChecked=0, Total=17292 [2020-07-21 01:06:16,939 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-21 01:07:21,801 WARN L193 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-21 01:08:21,568 WARN L193 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-21 01:09:23,635 WARN L193 SmtUtils]: Spent 6.58 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-21 01:10:22,818 WARN L193 SmtUtils]: Spent 5.46 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-21 01:11:16,486 WARN L193 SmtUtils]: Spent 7.27 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 01:12:12,709 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-21 01:12:59,067 WARN L193 SmtUtils]: Spent 7.78 s on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2020-07-21 01:13:01,105 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ |c_id_#res| 13) 4294967296) 1000) (< (mod (+ |c_id_#res| 4) 4294967296) 1000) (< (mod (+ |c_id_#res| 10) 4294967296) 1000) (< (mod (+ |c_id_#res| 7) 4294967296) 1000) (< (mod (+ |c_id_#res| 11) 4294967296) 1000) (< (mod (+ |c_id_#res| 2) 4294967296) 1000) (< (mod (+ |c_id_#res| 5) 4294967296) 1000) (< (mod (+ |c_id_#res| 25) 4294967296) 1000) (< (mod |c_id_#res| 4294967296) 1000) (< (mod (+ |c_id_#res| 21) 4294967296) 1000) (< (mod (+ |c_id_#res| 3) 4294967296) 1000) (< (mod (+ |c_id_#res| 27) 4294967296) 1000) (< (mod (+ |c_id_#res| 26) 4294967296) 1000) (< (mod (+ |c_id_#res| 20) 4294967296) 1000) (< (mod (+ |c_id_#res| 16) 4294967296) 1000) (< (mod (+ |c_id_#res| 9) 4294967296) 1000) (< (mod (+ |c_id_#res| 19) 4294967296) 1000) (< (mod (+ |c_id_#res| 18) 4294967296) 1000) (< (mod (+ |c_id_#res| 14) 4294967296) 1000) (< (mod (+ |c_id_#res| 24) 4294967296) 1000) (< (mod (+ |c_id_#res| 6) 4294967296) 1000) (< (mod (+ |c_id_#res| 15) 4294967296) 1000) (< (mod (+ |c_id_#res| 22) 4294967296) 1000) (< (mod (+ |c_id_#res| 8) 4294967296) 1000) (< (mod (+ |c_id_#res| 12) 4294967296) 1000) (< (mod (+ |c_id_#res| 17) 4294967296) 1000) (< (mod (+ |c_id_#res| 23) 4294967296) 1000) (< (mod (+ |c_id_#res| 1) 4294967296) 1000)) is different from false