/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/ssh-simplified/s3_srvr_1a.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:35:12,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:35:12,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:35:12,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:35:12,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:35:12,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:35:12,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:35:12,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:35:12,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:35:12,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:35:12,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:35:12,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:35:12,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:35:12,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:35:12,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:35:12,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:35:12,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:35:12,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:35:12,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:35:12,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:35:12,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:35:12,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:35:12,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:35:12,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:35:12,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:35:12,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:35:12,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:35:12,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:35:12,141 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 22:35:12,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:35:12,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:35:12,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:35:12,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:35:12,161 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:35:12,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:35:12,162 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:35:12,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:35:12,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:35:12,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:35:12,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:35:12,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:35:12,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:35:12,163 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:35:12,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:35:12,163 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:35:12,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:35:12,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:35:12,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:35:12,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:35:12,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:35:12,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:35:12,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:35:12,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:35:12,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:35:12,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:35:12,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:12,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:35:12,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:35:12,166 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 22:35:12,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:35:12,480 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:35:12,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:35:12,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:35:12,486 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:35:12,487 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c [2020-07-21 22:35:12,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9fb51ff0/2bd5b49d8d264e9693f35fd6bb643f60/FLAGdba65fe80 [2020-07-21 22:35:13,076 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:35:13,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c [2020-07-21 22:35:13,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9fb51ff0/2bd5b49d8d264e9693f35fd6bb643f60/FLAGdba65fe80 [2020-07-21 22:35:13,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9fb51ff0/2bd5b49d8d264e9693f35fd6bb643f60 [2020-07-21 22:35:13,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:35:13,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:35:13,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:13,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:35:13,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:35:13,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ad3b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13, skipping insertion in model container [2020-07-21 22:35:13,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:35:13,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:35:13,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:13,728 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:35:13,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:13,883 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:35:13,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13 WrapperNode [2020-07-21 22:35:13,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:13,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:35:13,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:35:13,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:35:13,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (1/1) ... [2020-07-21 22:35:13,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:35:13,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:35:13,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:35:13,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:35:13,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (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 22:35:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:35:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:35:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:35:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:35:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 22:35:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:35:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-21 22:35:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:35:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:35:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:35:14,298 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:35:14,298 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 22:35:14,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:14 BoogieIcfgContainer [2020-07-21 22:35:14,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:35:14,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:35:14,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:35:14,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:35:14,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:35:13" (1/3) ... [2020-07-21 22:35:14,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19af0e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:14, skipping insertion in model container [2020-07-21 22:35:14,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:13" (2/3) ... [2020-07-21 22:35:14,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19af0e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:14, skipping insertion in model container [2020-07-21 22:35:14,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:14" (3/3) ... [2020-07-21 22:35:14,315 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1a.cil.c [2020-07-21 22:35:14,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:35:14,342 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:35:14,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:35:14,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:35:14,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:35:14,394 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:35:14,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:35:14,397 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:35:14,397 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:35:14,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:35:14,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:35:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-07-21 22:35:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 22:35:14,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:14,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:14,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:14,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919768, now seen corresponding path program 1 times [2020-07-21 22:35:14,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:14,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238702951] [2020-07-21 22:35:14,447 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 22:35:14,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:14,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:14,586 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 22:35:14,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:14,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238702951] [2020-07-21 22:35:14,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:14,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:14,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822578665] [2020-07-21 22:35:14,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:14,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:14,618 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-07-21 22:35:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:14,741 INFO L93 Difference]: Finished difference Result 136 states and 224 transitions. [2020-07-21 22:35:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:14,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 22:35:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:14,758 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:35:14,758 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 22:35:14,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 22:35:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-07-21 22:35:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 22:35:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-07-21 22:35:14,819 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 8 [2020-07-21 22:35:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:14,820 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-07-21 22:35:14,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-07-21 22:35:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:35:14,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:14,822 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:15,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:15,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:15,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454160, now seen corresponding path program 1 times [2020-07-21 22:35:15,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:15,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028874481] [2020-07-21 22:35:15,042 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 22:35:15,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:15,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:15,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028874481] [2020-07-21 22:35:15,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:15,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:15,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012727020] [2020-07-21 22:35:15,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:15,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:15,126 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 3 states. [2020-07-21 22:35:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:15,271 INFO L93 Difference]: Finished difference Result 161 states and 253 transitions. [2020-07-21 22:35:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:15,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 22:35:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:15,278 INFO L225 Difference]: With dead ends: 161 [2020-07-21 22:35:15,278 INFO L226 Difference]: Without dead ends: 121 [2020-07-21 22:35:15,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-21 22:35:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-07-21 22:35:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:35:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 184 transitions. [2020-07-21 22:35:15,314 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 184 transitions. Word has length 13 [2020-07-21 22:35:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:15,314 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 184 transitions. [2020-07-21 22:35:15,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 184 transitions. [2020-07-21 22:35:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:35:15,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:15,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:15,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:15,525 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1216248382, now seen corresponding path program 1 times [2020-07-21 22:35:15,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:15,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195901112] [2020-07-21 22:35:15,528 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 22:35:15,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:35:15,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:15,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195901112] [2020-07-21 22:35:15,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:15,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:15,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414151312] [2020-07-21 22:35:15,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:15,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:15,592 INFO L87 Difference]: Start difference. First operand 121 states and 184 transitions. Second operand 3 states. [2020-07-21 22:35:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:15,659 INFO L93 Difference]: Finished difference Result 237 states and 369 transitions. [2020-07-21 22:35:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:15,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 22:35:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:15,663 INFO L225 Difference]: With dead ends: 237 [2020-07-21 22:35:15,663 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 22:35:15,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 22:35:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-07-21 22:35:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 22:35:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 243 transitions. [2020-07-21 22:35:15,688 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 243 transitions. Word has length 19 [2020-07-21 22:35:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:15,688 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 243 transitions. [2020-07-21 22:35:15,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 243 transitions. [2020-07-21 22:35:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 22:35:15,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:15,691 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:15,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:15,901 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1623728883, now seen corresponding path program 1 times [2020-07-21 22:35:15,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:15,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137563057] [2020-07-21 22:35:15,904 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 22:35:15,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 22:35:15,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:15,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137563057] [2020-07-21 22:35:15,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:15,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:15,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144927418] [2020-07-21 22:35:15,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:15,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:15,983 INFO L87 Difference]: Start difference. First operand 159 states and 243 transitions. Second operand 3 states. [2020-07-21 22:35:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:16,189 INFO L93 Difference]: Finished difference Result 371 states and 583 transitions. [2020-07-21 22:35:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:16,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-07-21 22:35:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:16,196 INFO L225 Difference]: With dead ends: 371 [2020-07-21 22:35:16,196 INFO L226 Difference]: Without dead ends: 217 [2020-07-21 22:35:16,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-21 22:35:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2020-07-21 22:35:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-21 22:35:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 295 transitions. [2020-07-21 22:35:16,239 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 295 transitions. Word has length 34 [2020-07-21 22:35:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:16,242 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 295 transitions. [2020-07-21 22:35:16,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 295 transitions. [2020-07-21 22:35:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 22:35:16,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:16,246 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:16,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:16,447 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1694730092, now seen corresponding path program 1 times [2020-07-21 22:35:16,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:16,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892831253] [2020-07-21 22:35:16,450 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 22:35:16,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:16,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 22:35:16,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:16,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892831253] [2020-07-21 22:35:16,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:16,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:16,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997344450] [2020-07-21 22:35:16,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:16,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:16,514 INFO L87 Difference]: Start difference. First operand 211 states and 295 transitions. Second operand 3 states. [2020-07-21 22:35:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:16,570 INFO L93 Difference]: Finished difference Result 419 states and 592 transitions. [2020-07-21 22:35:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:16,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-21 22:35:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:16,573 INFO L225 Difference]: With dead ends: 419 [2020-07-21 22:35:16,574 INFO L226 Difference]: Without dead ends: 264 [2020-07-21 22:35:16,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-21 22:35:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-07-21 22:35:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-21 22:35:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 369 transitions. [2020-07-21 22:35:16,594 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 369 transitions. Word has length 48 [2020-07-21 22:35:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:16,595 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 369 transitions. [2020-07-21 22:35:16,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 369 transitions. [2020-07-21 22:35:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 22:35:16,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:16,598 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:16,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:16,814 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash 365198397, now seen corresponding path program 1 times [2020-07-21 22:35:16,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:16,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259088691] [2020-07-21 22:35:16,816 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 22:35:16,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 22:35:16,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:16,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259088691] [2020-07-21 22:35:16,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:16,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:16,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960426021] [2020-07-21 22:35:16,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:16,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:16,878 INFO L87 Difference]: Start difference. First operand 262 states and 369 transitions. Second operand 3 states. [2020-07-21 22:35:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:16,968 INFO L93 Difference]: Finished difference Result 527 states and 756 transitions. [2020-07-21 22:35:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:16,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-07-21 22:35:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:16,977 INFO L225 Difference]: With dead ends: 527 [2020-07-21 22:35:16,977 INFO L226 Difference]: Without dead ends: 192 [2020-07-21 22:35:16,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-21 22:35:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-07-21 22:35:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 22:35:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2020-07-21 22:35:16,992 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 51 [2020-07-21 22:35:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:16,992 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2020-07-21 22:35:16,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2020-07-21 22:35:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 22:35:16,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:16,997 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:17,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:17,212 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1939547864, now seen corresponding path program 1 times [2020-07-21 22:35:17,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:17,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671956652] [2020-07-21 22:35:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:17,287 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:35:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 22:35:17,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:17,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671956652] [2020-07-21 22:35:17,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:17,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:17,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360519626] [2020-07-21 22:35:17,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:17,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:17,310 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand 3 states. [2020-07-21 22:35:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:17,351 INFO L93 Difference]: Finished difference Result 225 states and 289 transitions. [2020-07-21 22:35:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:17,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-07-21 22:35:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:17,354 INFO L225 Difference]: With dead ends: 225 [2020-07-21 22:35:17,355 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 22:35:17,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 22:35:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-07-21 22:35:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-21 22:35:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 287 transitions. [2020-07-21 22:35:17,369 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 287 transitions. Word has length 79 [2020-07-21 22:35:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:17,370 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 287 transitions. [2020-07-21 22:35:17,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 287 transitions. [2020-07-21 22:35:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 22:35:17,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:17,374 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:17,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:17,586 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:17,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2067785068, now seen corresponding path program 1 times [2020-07-21 22:35:17,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:17,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462019574] [2020-07-21 22:35:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:17,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 22:35:17,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:17,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462019574] [2020-07-21 22:35:17,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:17,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:17,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20518441] [2020-07-21 22:35:17,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:17,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:17,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:17,689 INFO L87 Difference]: Start difference. First operand 223 states and 287 transitions. Second operand 3 states. [2020-07-21 22:35:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:17,734 INFO L93 Difference]: Finished difference Result 344 states and 418 transitions. [2020-07-21 22:35:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:17,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-07-21 22:35:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:17,735 INFO L225 Difference]: With dead ends: 344 [2020-07-21 22:35:17,735 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:35:17,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:35:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:35:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:35:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:35:17,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2020-07-21 22:35:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:17,738 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:35:17,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:35:17,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:35:17,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:17,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:35:18,407 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:35:18,408 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:35:18,408 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:35:18,408 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:35:18,408 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:35:18,408 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:35:18,408 INFO L268 CegarLoopResult]: For program point L60(lines 60 189) no Hoare annotation was computed. [2020-07-21 22:35:18,409 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 217) no Hoare annotation was computed. [2020-07-21 22:35:18,409 INFO L268 CegarLoopResult]: For program point L151-1(lines 74 183) no Hoare annotation was computed. [2020-07-21 22:35:18,409 INFO L268 CegarLoopResult]: For program point L52(lines 52 193) no Hoare annotation was computed. [2020-07-21 22:35:18,409 INFO L268 CegarLoopResult]: For program point L85-1(lines 74 183) no Hoare annotation was computed. [2020-07-21 22:35:18,409 INFO L264 CegarLoopResult]: At program point L176(lines 22 211) the Hoare annotation is: (let ((.cse0 (<= main_~blastFlag~0 3))) (or (and (not (= 0 main_~s__hit~0)) .cse0 (<= 8640 main_~s__state~0)) (and (<= 8672 main_~s__state~0) .cse0) (<= main_~blastFlag~0 2))) [2020-07-21 22:35:18,410 INFO L268 CegarLoopResult]: For program point L44(lines 44 197) no Hoare annotation was computed. [2020-07-21 22:35:18,410 INFO L268 CegarLoopResult]: For program point L135(lines 135 139) no Hoare annotation was computed. [2020-07-21 22:35:18,410 INFO L264 CegarLoopResult]: At program point L69(lines 68 185) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-21 22:35:18,410 INFO L268 CegarLoopResult]: For program point L36(lines 36 201) no Hoare annotation was computed. [2020-07-21 22:35:18,410 INFO L264 CegarLoopResult]: At program point L61(lines 60 189) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,410 INFO L264 CegarLoopResult]: At program point L53(lines 52 193) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,411 INFO L264 CegarLoopResult]: At program point L45(lines 44 197) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,411 INFO L268 CegarLoopResult]: For program point L78-1(lines 78 80) no Hoare annotation was computed. [2020-07-21 22:35:18,411 INFO L268 CegarLoopResult]: For program point L169-1(lines 74 183) no Hoare annotation was computed. [2020-07-21 22:35:18,411 INFO L264 CegarLoopResult]: At program point L37(lines 36 201) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,411 INFO L268 CegarLoopResult]: For program point L29(lines 29 204) no Hoare annotation was computed. [2020-07-21 22:35:18,411 INFO L264 CegarLoopResult]: At program point L120(lines 113 122) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,412 INFO L264 CegarLoopResult]: At program point L112(lines 105 123) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,412 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 217) no Hoare annotation was computed. [2020-07-21 22:35:18,412 INFO L268 CegarLoopResult]: For program point L162-1(lines 162 164) no Hoare annotation was computed. [2020-07-21 22:35:18,412 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 215) no Hoare annotation was computed. [2020-07-21 22:35:18,412 INFO L264 CegarLoopResult]: At program point L30(lines 29 204) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,413 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 217) the Hoare annotation is: true [2020-07-21 22:35:18,413 INFO L268 CegarLoopResult]: For program point L105(lines 105 123) no Hoare annotation was computed. [2020-07-21 22:35:18,413 INFO L268 CegarLoopResult]: For program point L72(lines 72 183) no Hoare annotation was computed. [2020-07-21 22:35:18,413 INFO L268 CegarLoopResult]: For program point L64(lines 64 187) no Hoare annotation was computed. [2020-07-21 22:35:18,413 INFO L268 CegarLoopResult]: For program point L56(lines 56 191) no Hoare annotation was computed. [2020-07-21 22:35:18,413 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-21 22:35:18,413 INFO L271 CegarLoopResult]: At program point L213(lines 8 217) the Hoare annotation is: true [2020-07-21 22:35:18,414 INFO L268 CegarLoopResult]: For program point L114(lines 114 118) no Hoare annotation was computed. [2020-07-21 22:35:18,414 INFO L268 CegarLoopResult]: For program point L48(lines 48 195) no Hoare annotation was computed. [2020-07-21 22:35:18,414 INFO L268 CegarLoopResult]: For program point L172(lines 172 174) no Hoare annotation was computed. [2020-07-21 22:35:18,414 INFO L268 CegarLoopResult]: For program point L106(lines 106 110) no Hoare annotation was computed. [2020-07-21 22:35:18,414 INFO L264 CegarLoopResult]: At program point L73(lines 72 183) the Hoare annotation is: (and (<= 8672 main_~s__state~0) (<= main_~blastFlag~0 3)) [2020-07-21 22:35:18,414 INFO L268 CegarLoopResult]: For program point L40(lines 40 199) no Hoare annotation was computed. [2020-07-21 22:35:18,415 INFO L264 CegarLoopResult]: At program point L65(lines 64 187) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-21 22:35:18,415 INFO L268 CegarLoopResult]: For program point L32(lines 32 203) no Hoare annotation was computed. [2020-07-21 22:35:18,415 INFO L264 CegarLoopResult]: At program point L57(lines 56 191) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,415 INFO L264 CegarLoopResult]: At program point L49(lines 48 195) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,415 INFO L264 CegarLoopResult]: At program point L173(lines 8 217) the Hoare annotation is: false [2020-07-21 22:35:18,415 INFO L264 CegarLoopResult]: At program point L41(lines 40 199) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,416 INFO L264 CegarLoopResult]: At program point L33(lines 32 203) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 22:35:18,416 INFO L268 CegarLoopResult]: For program point L68(lines 68 185) no Hoare annotation was computed. [2020-07-21 22:35:18,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:35:18 BoogieIcfgContainer [2020-07-21 22:35:18,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:35:18,443 INFO L168 Benchmark]: Toolchain (without parser) took 4984.27 ms. Allocated memory was 143.1 MB in the beginning and 251.7 MB in the end (delta: 108.5 MB). Free memory was 100.8 MB in the beginning and 180.0 MB in the end (delta: -79.2 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:18,444 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:35:18,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.39 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 100.4 MB in the beginning and 179.5 MB in the end (delta: -79.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:18,446 INFO L168 Benchmark]: Boogie Preprocessor took 39.90 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 177.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:18,446 INFO L168 Benchmark]: RCFGBuilder took 374.59 ms. Allocated memory is still 200.8 MB. Free memory was 177.0 MB in the beginning and 157.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:18,447 INFO L168 Benchmark]: TraceAbstraction took 4134.64 ms. Allocated memory was 200.8 MB in the beginning and 251.7 MB in the end (delta: 50.9 MB). Free memory was 157.2 MB in the beginning and 180.0 MB in the end (delta: -22.9 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:18,451 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 428.39 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 100.4 MB in the beginning and 179.5 MB in the end (delta: -79.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.90 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 177.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.59 ms. Allocated memory is still 200.8 MB. Free memory was 177.0 MB in the beginning and 157.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4134.64 ms. Allocated memory was 200.8 MB in the beginning and 251.7 MB in the end (delta: 50.9 MB). Free memory was 157.2 MB in the beginning and 180.0 MB in the end (delta: -22.9 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 215]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 113]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 68]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 105]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) || (8672 <= s__state && blastFlag <= 3)) || blastFlag <= 2 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 60]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 72]: Loop Invariant Derived loop invariant: 8672 <= s__state && blastFlag <= 3 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: blastFlag <= 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 513 SDtfs, 290 SDslu, 344 SDs, 0 SdLazy, 215 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 21 PreInvPairs, 86 NumberOfFragments, 106 HoareAnnotationTreeSize, 21 FomulaSimplifications, 614 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 21 FomulaSimplificationsInter, 184 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 347 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 38997 SizeOfPredicates, 7 NumberOfNonLiveVariables, 651 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 374/374 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...