/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_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:54:38,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:54:38,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:54:38,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:54:38,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:54:38,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:54:38,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:54:38,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:54:38,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:54:38,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:54:38,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:54:38,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:54:38,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:54:38,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:54:38,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:54:38,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:54:38,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:54:38,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:54:38,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:54:38,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:54:38,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:54:38,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:54:38,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:54:38,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:54:38,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:54:38,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:54:38,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:54:38,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:54:38,269 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 13:54:38,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:54:38,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:54:38,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:54:38,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:54:38,294 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:54:38,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:54:38,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:54:38,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:54:38,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:54:38,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:54:38,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:54:38,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:54:38,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:54:38,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:54:38,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:54:38,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:54:38,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:54:38,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:54:38,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:54:38,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:54:38,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:54:38,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:54:38,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:54:38,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:54:38,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:54:38,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:54:38,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:38,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:54:38,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:54:38,301 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_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:54:38,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:54:38,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:54:38,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:54:38,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:54:38,585 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:54:38,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-07-21 13:54:38,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/512dc989b/09713b21422043e29183bbff8786f17c/FLAG32e71d2f2 [2020-07-21 13:54:39,208 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:54:39,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-07-21 13:54:39,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/512dc989b/09713b21422043e29183bbff8786f17c/FLAG32e71d2f2 [2020-07-21 13:54:39,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/512dc989b/09713b21422043e29183bbff8786f17c [2020-07-21 13:54:39,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:54:39,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:54:39,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:54:39,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:54:39,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:54:39,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5276ab18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39, skipping insertion in model container [2020-07-21 13:54:39,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:54:39,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:54:40,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:54:40,054 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:54:40,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:54:40,323 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:54:40,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40 WrapperNode [2020-07-21 13:54:40,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:54:40,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:54:40,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:54:40,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:54:40,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (1/1) ... [2020-07-21 13:54:40,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:54:40,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:54:40,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:54:40,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:54:40,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (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 13:54:40,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:54:40,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:54:40,555 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 13:54:40,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:54:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 13:54:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:54:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:54:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:54:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:54:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:54:40,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:54:41,943 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:54:41,943 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 13:54:41,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:54:41 BoogieIcfgContainer [2020-07-21 13:54:41,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:54:41,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:54:41,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:54:41,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:54:41,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:54:39" (1/3) ... [2020-07-21 13:54:41,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c19268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:54:41, skipping insertion in model container [2020-07-21 13:54:41,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:40" (2/3) ... [2020-07-21 13:54:41,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c19268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:54:41, skipping insertion in model container [2020-07-21 13:54:41,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:54:41" (3/3) ... [2020-07-21 13:54:41,965 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label45.c [2020-07-21 13:54:41,978 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:54:41,992 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:54:42,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:54:42,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:54:42,044 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:54:42,044 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:54:42,044 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:54:42,045 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:54:42,045 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:54:42,045 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:54:42,045 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:54:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 13:54:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 13:54:42,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:54:42,088 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 13:54:42,088 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:54:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:54:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 312365279, now seen corresponding path program 1 times [2020-07-21 13:54:42,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:54:42,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728314056] [2020-07-21 13:54:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:42,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:54:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:54:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:54:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:54:42,365 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 13:54:42,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:54:42,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728314056] [2020-07-21 13:54:42,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:54:42,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:54:42,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59489825] [2020-07-21 13:54:42,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:54:42,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:54:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:54:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:54:42,405 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 13:54:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:54:43,556 INFO L93 Difference]: Finished difference Result 586 states and 1004 transitions. [2020-07-21 13:54:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:54:43,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-07-21 13:54:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:54:43,574 INFO L225 Difference]: With dead ends: 586 [2020-07-21 13:54:43,575 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 13:54:43,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 13:54:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 13:54:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 13:54:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 13:54:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2020-07-21 13:54:43,657 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 44 [2020-07-21 13:54:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:54:43,658 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2020-07-21 13:54:43,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:54:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2020-07-21 13:54:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-21 13:54:43,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:54:43,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 13:54:43,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:43,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:54:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:54:43,876 INFO L82 PathProgramCache]: Analyzing trace with hash -269514694, now seen corresponding path program 1 times [2020-07-21 13:54:43,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:54:43,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873366399] [2020-07-21 13:54:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:43,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:54:43,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:54:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:54:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:54:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:54:44,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:54:44,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873366399] [2020-07-21 13:54:44,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:54:44,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:54:44,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117723167] [2020-07-21 13:54:44,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:54:44,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:54:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:54:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:54:44,082 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 5 states. [2020-07-21 13:54:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:54:45,206 INFO L93 Difference]: Finished difference Result 890 states and 1316 transitions. [2020-07-21 13:54:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:54:45,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-07-21 13:54:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:54:45,218 INFO L225 Difference]: With dead ends: 890 [2020-07-21 13:54:45,218 INFO L226 Difference]: Without dead ends: 602 [2020-07-21 13:54:45,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 13:54:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-07-21 13:54:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2020-07-21 13:54:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-21 13:54:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 775 transitions. [2020-07-21 13:54:45,279 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 775 transitions. Word has length 118 [2020-07-21 13:54:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:54:45,280 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 775 transitions. [2020-07-21 13:54:45,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:54:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 775 transitions. [2020-07-21 13:54:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-21 13:54:45,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:54:45,283 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-07-21 13:54:45,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:45,498 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:54:45,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:54:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash -681057027, now seen corresponding path program 1 times [2020-07-21 13:54:45,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:54:45,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834473791] [2020-07-21 13:54:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:45,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:54:45,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:54:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:54:45,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:54:45,615 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:54:45,617 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 13:54:47,828 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:54:49,885 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:54:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:54:50,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:54:50,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:54:50,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:54:50,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834473791] [2020-07-21 13:54:50,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:54:50,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 13:54:50,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178964618] [2020-07-21 13:54:50,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:54:50,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:54:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:54:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 13:54:50,214 INFO L87 Difference]: Start difference. First operand 590 states and 775 transitions. Second operand 6 states. [2020-07-21 13:59:48,802 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 14:03:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:03:13,050 INFO L93 Difference]: Finished difference Result 1939 states and 2669 transitions. [2020-07-21 14:03:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 14:03:13,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-07-21 14:03:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:03:13,070 INFO L225 Difference]: With dead ends: 1939 [2020-07-21 14:03:13,070 INFO L226 Difference]: Without dead ends: 1355 [2020-07-21 14:03:13,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=58, Invalid=95, Unknown=3, NotChecked=0, Total=156 [2020-07-21 14:03:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-07-21 14:03:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1333. [2020-07-21 14:03:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2020-07-21 14:03:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1753 transitions. [2020-07-21 14:03:13,137 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1753 transitions. Word has length 123 [2020-07-21 14:03:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:03:13,138 INFO L479 AbstractCegarLoop]: Abstraction has 1333 states and 1753 transitions. [2020-07-21 14:03:13,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:03:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1753 transitions. [2020-07-21 14:03:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-21 14:03:13,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:03:13,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-07-21 14:03:13,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:13,346 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:03:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:03:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -255280675, now seen corresponding path program 1 times [2020-07-21 14:03:13,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:03:13,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804508205] [2020-07-21 14:03:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:13,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:03:13,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:03:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:03:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:03:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:13,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:03:13,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804508205] [2020-07-21 14:03:13,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:03:13,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:03:13,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072385024] [2020-07-21 14:03:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:03:13,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:03:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:03:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:03:13,692 INFO L87 Difference]: Start difference. First operand 1333 states and 1753 transitions. Second operand 5 states. [2020-07-21 14:03:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:03:20,038 INFO L93 Difference]: Finished difference Result 3437 states and 4825 transitions. [2020-07-21 14:03:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:03:20,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-07-21 14:03:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:03:20,071 INFO L225 Difference]: With dead ends: 3437 [2020-07-21 14:03:20,072 INFO L226 Difference]: Without dead ends: 2253 [2020-07-21 14:03:20,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:03:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2020-07-21 14:03:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2020-07-21 14:03:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-07-21 14:03:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2747 transitions. [2020-07-21 14:03:20,230 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2747 transitions. Word has length 139 [2020-07-21 14:03:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:03:20,232 INFO L479 AbstractCegarLoop]: Abstraction has 2076 states and 2747 transitions. [2020-07-21 14:03:20,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:03:20,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2747 transitions. [2020-07-21 14:03:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-21 14:03:20,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:03:20,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-07-21 14:03:20,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:20,451 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:03:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:03:20,452 INFO L82 PathProgramCache]: Analyzing trace with hash -678088530, now seen corresponding path program 1 times [2020-07-21 14:03:20,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:03:20,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692312225] [2020-07-21 14:03:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:20,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:03:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:03:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:03:20,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:03:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:20,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:03:20,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692312225] [2020-07-21 14:03:20,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:03:20,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:03:20,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079493975] [2020-07-21 14:03:20,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:03:20,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:03:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:03:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:03:20,654 INFO L87 Difference]: Start difference. First operand 2076 states and 2747 transitions. Second operand 3 states. [2020-07-21 14:03:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:03:25,638 INFO L93 Difference]: Finished difference Result 4583 states and 6192 transitions. [2020-07-21 14:03:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:03:25,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2020-07-21 14:03:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:03:25,672 INFO L225 Difference]: With dead ends: 4583 [2020-07-21 14:03:25,672 INFO L226 Difference]: Without dead ends: 2656 [2020-07-21 14:03:25,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 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 14:03:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2020-07-21 14:03:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2656. [2020-07-21 14:03:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2656 states. [2020-07-21 14:03:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3432 transitions. [2020-07-21 14:03:25,768 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3432 transitions. Word has length 140 [2020-07-21 14:03:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:03:25,769 INFO L479 AbstractCegarLoop]: Abstraction has 2656 states and 3432 transitions. [2020-07-21 14:03:25,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:03:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3432 transitions. [2020-07-21 14:03:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-21 14:03:25,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:03:25,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1] [2020-07-21 14:03:25,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:25,989 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:03:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:03:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -657040215, now seen corresponding path program 1 times [2020-07-21 14:03:25,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:03:25,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029390510] [2020-07-21 14:03:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:26,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:03:26,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:03:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:03:26,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:03:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:26,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:03:26,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029390510] [2020-07-21 14:03:26,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:03:26,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:03:26,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790397205] [2020-07-21 14:03:26,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:03:26,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:03:26,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:03:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:03:26,233 INFO L87 Difference]: Start difference. First operand 2656 states and 3432 transitions. Second operand 3 states. [2020-07-21 14:03:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:03:30,653 INFO L93 Difference]: Finished difference Result 3959 states and 5085 transitions. [2020-07-21 14:03:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:03:30,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2020-07-21 14:03:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:03:30,692 INFO L225 Difference]: With dead ends: 3959 [2020-07-21 14:03:30,693 INFO L226 Difference]: Without dead ends: 3957 [2020-07-21 14:03:30,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 14:03:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2020-07-21 14:03:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3099. [2020-07-21 14:03:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3099 states. [2020-07-21 14:03:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4046 transitions. [2020-07-21 14:03:30,827 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4046 transitions. Word has length 181 [2020-07-21 14:03:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:03:30,828 INFO L479 AbstractCegarLoop]: Abstraction has 3099 states and 4046 transitions. [2020-07-21 14:03:30,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:03:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4046 transitions. [2020-07-21 14:03:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-21 14:03:30,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:03:30,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:03:31,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:31,048 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:03:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:03:31,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1538101510, now seen corresponding path program 1 times [2020-07-21 14:03:31,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:03:31,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875081271] [2020-07-21 14:03:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:31,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:03:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:03:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:03:31,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:03:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:31,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:03:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:31,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875081271] [2020-07-21 14:03:31,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:03:31,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 14:03:31,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361267266] [2020-07-21 14:03:31,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:03:31,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:03:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:03:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:03:31,814 INFO L87 Difference]: Start difference. First operand 3099 states and 4046 transitions. Second operand 7 states. [2020-07-21 14:03:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:03:44,443 INFO L93 Difference]: Finished difference Result 7198 states and 10200 transitions. [2020-07-21 14:03:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 14:03:44,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 193 [2020-07-21 14:03:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:03:44,479 INFO L225 Difference]: With dead ends: 7198 [2020-07-21 14:03:44,479 INFO L226 Difference]: Without dead ends: 4105 [2020-07-21 14:03:44,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 384 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:03:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2020-07-21 14:03:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 3540. [2020-07-21 14:03:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2020-07-21 14:03:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4540 transitions. [2020-07-21 14:03:44,639 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4540 transitions. Word has length 193 [2020-07-21 14:03:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:03:44,640 INFO L479 AbstractCegarLoop]: Abstraction has 3540 states and 4540 transitions. [2020-07-21 14:03:44,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:03:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4540 transitions. [2020-07-21 14:03:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-21 14:03:44,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:03:44,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:03:44,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:44,852 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:03:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:03:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash -958838712, now seen corresponding path program 1 times [2020-07-21 14:03:44,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:03:44,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118614309] [2020-07-21 14:03:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:44,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:03:44,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:03:44,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:03:44,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:03:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:03:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:03:45,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118614309] [2020-07-21 14:03:45,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:03:45,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 14:03:45,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654203207] [2020-07-21 14:03:45,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:03:45,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:03:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:03:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:03:45,653 INFO L87 Difference]: Start difference. First operand 3540 states and 4540 transitions. Second operand 7 states. [2020-07-21 14:03:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:03:55,554 INFO L93 Difference]: Finished difference Result 6943 states and 8949 transitions. [2020-07-21 14:03:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 14:03:55,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2020-07-21 14:03:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:03:55,592 INFO L225 Difference]: With dead ends: 6943 [2020-07-21 14:03:55,592 INFO L226 Difference]: Without dead ends: 3409 [2020-07-21 14:03:55,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:03:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2020-07-21 14:03:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2827. [2020-07-21 14:03:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-07-21 14:03:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3271 transitions. [2020-07-21 14:03:55,763 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3271 transitions. Word has length 205 [2020-07-21 14:03:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:03:55,764 INFO L479 AbstractCegarLoop]: Abstraction has 2827 states and 3271 transitions. [2020-07-21 14:03:55,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:03:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3271 transitions. [2020-07-21 14:03:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-21 14:03:55,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:03:55,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2020-07-21 14:03:55,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:55,989 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:03:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:03:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash 590569913, now seen corresponding path program 1 times [2020-07-21 14:03:55,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:03:55,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245686466] [2020-07-21 14:03:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:03:56,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:03:56,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:03:56,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:03:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:03:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-21 14:03:56,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:03:56,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245686466] [2020-07-21 14:03:56,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:03:56,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:03:56,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111887369] [2020-07-21 14:03:56,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:03:56,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:03:56,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:03:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:03:56,278 INFO L87 Difference]: Start difference. First operand 2827 states and 3271 transitions. Second operand 3 states. [2020-07-21 14:04:01,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:04:01,403 INFO L93 Difference]: Finished difference Result 6508 states and 7549 transitions. [2020-07-21 14:04:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:04:01,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2020-07-21 14:04:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:04:01,426 INFO L225 Difference]: With dead ends: 6508 [2020-07-21 14:04:01,426 INFO L226 Difference]: Without dead ends: 2815 [2020-07-21 14:04:01,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 220 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 14:04:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2020-07-21 14:04:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2815. [2020-07-21 14:04:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2815 states. [2020-07-21 14:04:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3233 transitions. [2020-07-21 14:04:01,517 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3233 transitions. Word has length 222 [2020-07-21 14:04:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:04:01,518 INFO L479 AbstractCegarLoop]: Abstraction has 2815 states and 3233 transitions. [2020-07-21 14:04:01,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:04:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3233 transitions. [2020-07-21 14:04:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-07-21 14:04:01,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:04:01,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-21 14:04:01,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:01,734 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:04:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:04:01,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1367628375, now seen corresponding path program 1 times [2020-07-21 14:04:01,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:04:01,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903734215] [2020-07-21 14:04:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:01,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:04:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:04:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:04:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:04:02,058 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 3, 1] term [2020-07-21 14:04:02,058 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:04:02,061 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:04:02,062 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:02,065 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:04:02,071 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:02,072 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:04:02,080 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:04:02,081 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 14:04:12,530 WARN L193 SmtUtils]: Spent 10.34 s on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-07-21 14:04:12,595 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:12,732 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:12,734 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:04:18,943 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 14:04:23,204 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:04:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 171 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:04:23,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:04:24,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:24,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:04:24,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903734215] [2020-07-21 14:04:24,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 14:04:24,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 14:04:24,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974575816] [2020-07-21 14:04:24,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:04:24,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:04:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:04:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=83, Unknown=2, NotChecked=0, Total=110 [2020-07-21 14:04:24,283 INFO L87 Difference]: Start difference. First operand 2815 states and 3233 transitions. Second operand 9 states. [2020-07-21 14:06:10,578 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 14:07:10,202 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2020-07-21 14:07:13,562 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-07-21 14:07:58,395 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2020-07-21 14:08:03,855 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-07-21 14:08:15,204 WARN L193 SmtUtils]: Spent 8.61 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-07-21 14:08:28,938 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-21 14:08:31,822 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 14:08:37,216 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-21 14:08:50,444 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 14:08:53,640 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2020-07-21 14:08:54,115 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21