/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --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/eca-rers2012/Problem10_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:29:17,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:29:17,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:29:17,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:29:17,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:29:17,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:29:17,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:29:17,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:29:17,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:29:17,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:29:17,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:29:17,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:29:17,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:29:17,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:29:17,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:29:17,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:29:17,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:29:17,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:29:17,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:29:17,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:29:17,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:29:17,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:29:17,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:29:17,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:29:17,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:29:17,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:29:17,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:29:17,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:29:17,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:29:17,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:29:17,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:29:17,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:29:17,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:29:17,222 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:29:17,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:29:17,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:29:17,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:29:17,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:29:17,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:29:17,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:29:17,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:29:17,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:29:17,226 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:29:17,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:29:17,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:29:17,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:29:17,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:29:17,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:29:17,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:29:17,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:29:17,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:29:17,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:29:17,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:29:17,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:29:17,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:29:17,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:17,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:29:17,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:29:17,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:29:17,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:29:17,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:29:17,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:29:17,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:29:17,587 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:29:17,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label15.c [2020-07-20 17:29:17,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea14c173/c14c67a02bde4d7c99807b3c78176a24/FLAG1e03019d4 [2020-07-20 17:29:18,255 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:29:18,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label15.c [2020-07-20 17:29:18,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea14c173/c14c67a02bde4d7c99807b3c78176a24/FLAG1e03019d4 [2020-07-20 17:29:18,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea14c173/c14c67a02bde4d7c99807b3c78176a24 [2020-07-20 17:29:18,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:29:18,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:29:18,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:29:18,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:29:18,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:29:18,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:18" (1/1) ... [2020-07-20 17:29:18,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23116018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:18, skipping insertion in model container [2020-07-20 17:29:18,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:18" (1/1) ... [2020-07-20 17:29:18,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:29:18,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:29:19,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:29:19,038 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:29:19,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:29:19,339 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:29:19,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19 WrapperNode [2020-07-20 17:29:19,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:29:19,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:29:19,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:29:19,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:29:19,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... [2020-07-20 17:29:19,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:29:19,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:29:19,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:29:19,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:29:19,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:29:19,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:29:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:29:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 17:29:19,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:29:19,547 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 17:29:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:29:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:29:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:29:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:29:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:29:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:29:21,136 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:29:21,137 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:29:21,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:21 BoogieIcfgContainer [2020-07-20 17:29:21,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:29:21,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:29:21,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:29:21,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:29:21,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:29:18" (1/3) ... [2020-07-20 17:29:21,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88ace09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:21, skipping insertion in model container [2020-07-20 17:29:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:19" (2/3) ... [2020-07-20 17:29:21,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88ace09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:21, skipping insertion in model container [2020-07-20 17:29:21,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:21" (3/3) ... [2020-07-20 17:29:21,169 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label15.c [2020-07-20 17:29:21,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:29:21,199 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:29:21,216 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:29:21,254 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:29:21,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:29:21,256 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:29:21,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:29:21,256 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:29:21,256 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:29:21,256 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:29:21,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:29:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-20 17:29:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:29:21,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:21,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:29:21,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash -553937361, now seen corresponding path program 1 times [2020-07-20 17:29:21,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:21,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091646751] [2020-07-20 17:29:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:21,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:29:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:21,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:29:21,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091646751] [2020-07-20 17:29:21,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:29:21,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:29:21,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45701412] [2020-07-20 17:29:21,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:29:21,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:29:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:21,563 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-20 17:29:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:22,857 INFO L93 Difference]: Finished difference Result 586 states and 1004 transitions. [2020-07-20 17:29:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:29:22,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 17:29:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:22,904 INFO L225 Difference]: With dead ends: 586 [2020-07-20 17:29:22,904 INFO L226 Difference]: Without dead ends: 294 [2020-07-20 17:29:22,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-20 17:29:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-20 17:29:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-20 17:29:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2020-07-20 17:29:22,999 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 16 [2020-07-20 17:29:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:23,000 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2020-07-20 17:29:23,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:29:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2020-07-20 17:29:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 17:29:23,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:23,006 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:29:23,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:23,222 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2065323538, now seen corresponding path program 1 times [2020-07-20 17:29:23,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:23,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612947787] [2020-07-20 17:29:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:23,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:29:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:23,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:29:23,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612947787] [2020-07-20 17:29:23,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:29:23,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:29:23,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639030069] [2020-07-20 17:29:23,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:29:23,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:29:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:23,413 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 3 states. [2020-07-20 17:29:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:24,192 INFO L93 Difference]: Finished difference Result 868 states and 1337 transitions. [2020-07-20 17:29:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:29:24,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-07-20 17:29:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:24,199 INFO L225 Difference]: With dead ends: 868 [2020-07-20 17:29:24,200 INFO L226 Difference]: Without dead ends: 580 [2020-07-20 17:29:24,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-07-20 17:29:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 437. [2020-07-20 17:29:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-07-20 17:29:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 648 transitions. [2020-07-20 17:29:24,245 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 648 transitions. Word has length 86 [2020-07-20 17:29:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:24,246 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 648 transitions. [2020-07-20 17:29:24,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:29:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 648 transitions. [2020-07-20 17:29:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 17:29:24,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:24,250 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1] [2020-07-20 17:29:24,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:24,465 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -988997391, now seen corresponding path program 1 times [2020-07-20 17:29:24,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:24,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767741968] [2020-07-20 17:29:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:24,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:29:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:24,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:29:24,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767741968] [2020-07-20 17:29:24,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:29:24,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:29:24,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977527567] [2020-07-20 17:29:24,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:29:24,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:29:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:24,625 INFO L87 Difference]: Start difference. First operand 437 states and 648 transitions. Second operand 3 states. [2020-07-20 17:29:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:25,493 INFO L93 Difference]: Finished difference Result 1154 states and 1744 transitions. [2020-07-20 17:29:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:29:25,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-07-20 17:29:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:25,501 INFO L225 Difference]: With dead ends: 1154 [2020-07-20 17:29:25,501 INFO L226 Difference]: Without dead ends: 723 [2020-07-20 17:29:25,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-07-20 17:29:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2020-07-20 17:29:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-07-20 17:29:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1077 transitions. [2020-07-20 17:29:25,543 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1077 transitions. Word has length 93 [2020-07-20 17:29:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:25,543 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 1077 transitions. [2020-07-20 17:29:25,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:29:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1077 transitions. [2020-07-20 17:29:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 17:29:25,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:25,548 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:29:25,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:25,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1138476029, now seen corresponding path program 1 times [2020-07-20 17:29:25,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:25,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125572688] [2020-07-20 17:29:25,764 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