/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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:29:43,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:29:43,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:29:43,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:29:43,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:29:43,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:29:43,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:29:43,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:29:43,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:29:43,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:29:43,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:29:43,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:29:43,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:29:43,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:29:43,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:29:43,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:29:43,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:29:43,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:29:43,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:29:43,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:29:43,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:29:43,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:29:43,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:29:43,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:29:43,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:29:43,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:29:43,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:29:43,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:29:43,086 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 17:29:43,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:29:43,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:29:43,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:29:43,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:29:43,107 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:29:43,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:29:43,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:29:43,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:29:43,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:29:43,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:29:43,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:29:43,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:29:43,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:29:43,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:29:43,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:29:43,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:29:43,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:29:43,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:29:43,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:29:43,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:29:43,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:29:43,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:29:43,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:29:43,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:29:43,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:29:43,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:29:43,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:43,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:29:43,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:29:43,112 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 17:29:43,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:29:43,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:29:43,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:29:43,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:29:43,481 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:29:43,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label32.c [2020-07-20 17:29:43,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b328b00c/314f6a723586433ea3b1cbcb1f59d5c6/FLAGdb1745695 [2020-07-20 17:29:44,225 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:29:44,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label32.c [2020-07-20 17:29:44,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b328b00c/314f6a723586433ea3b1cbcb1f59d5c6/FLAGdb1745695 [2020-07-20 17:29:44,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b328b00c/314f6a723586433ea3b1cbcb1f59d5c6 [2020-07-20 17:29:44,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:29:44,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:29:44,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:29:44,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:29:44,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:29:44,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:44" (1/1) ... [2020-07-20 17:29:44,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7012a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:44, skipping insertion in model container [2020-07-20 17:29:44,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:44" (1/1) ... [2020-07-20 17:29:44,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:29:44,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:29:45,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:29:45,208 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:29:45,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:29:45,409 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:29:45,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45 WrapperNode [2020-07-20 17:29:45,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:29:45,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:29:45,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:29:45,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:29:45,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (1/1) ... [2020-07-20 17:29:45,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:29:45,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:29:45,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:29:45,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:29:45,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (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 17:29:45,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:29:45,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:29:45,667 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 17:29:45,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:29:45,668 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 17:29:45,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:29:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:29:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:29:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:29:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:29:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:29:47,176 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:29:47,176 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:29:47,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:47 BoogieIcfgContainer [2020-07-20 17:29:47,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:29:47,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:29:47,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:29:47,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:29:47,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:29:44" (1/3) ... [2020-07-20 17:29:47,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e76b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:47, skipping insertion in model container [2020-07-20 17:29:47,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:45" (2/3) ... [2020-07-20 17:29:47,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e76b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:47, skipping insertion in model container [2020-07-20 17:29:47,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:47" (3/3) ... [2020-07-20 17:29:47,194 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label32.c [2020-07-20 17:29:47,207 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:29:47,216 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:29:47,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:29:47,258 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:29:47,258 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:29:47,258 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:29:47,258 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:29:47,258 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:29:47,259 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:29:47,259 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:29:47,259 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:29:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-20 17:29:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:29:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:47,303 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] [2020-07-20 17:29:47,304 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1877810762, now seen corresponding path program 1 times [2020-07-20 17:29:47,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:47,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111641705] [2020-07-20 17:29:47,325 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 17:29:47,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:47,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:29:47,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:47,527 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 17:29:47,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:29:47,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111641705] [2020-07-20 17:29:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:29:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:29:47,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351421318] [2020-07-20 17:29:47,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:29:47,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:47,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:29:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:47,555 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-20 17:29:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:48,836 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-20 17:29:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:29:48,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 17:29:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:48,860 INFO L225 Difference]: With dead ends: 571 [2020-07-20 17:29:48,860 INFO L226 Difference]: Without dead ends: 294 [2020-07-20 17:29:48,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 17:29:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-20 17:29:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-20 17:29:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-20 17:29:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-20 17:29:49,006 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 31 [2020-07-20 17:29:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:49,007 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-20 17:29:49,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:29:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-20 17:29:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 17:29:49,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:49,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:29:49,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:49,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1943210670, now seen corresponding path program 1 times [2020-07-20 17:29:49,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:49,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877451150] [2020-07-20 17:29:49,221 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 17:29:49,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:49,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:29:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:49,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:29:49,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877451150] [2020-07-20 17:29:49,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:29:49,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:29:49,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223425628] [2020-07-20 17:29:49,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:29:49,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:29:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:49,409 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 3 states. [2020-07-20 17:29:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:50,246 INFO L93 Difference]: Finished difference Result 725 states and 1001 transitions. [2020-07-20 17:29:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:29:50,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-07-20 17:29:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:50,257 INFO L225 Difference]: With dead ends: 725 [2020-07-20 17:29:50,258 INFO L226 Difference]: Without dead ends: 437 [2020-07-20 17:29:50,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 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 17:29:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-07-20 17:29:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2020-07-20 17:29:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-07-20 17:29:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 593 transitions. [2020-07-20 17:29:50,305 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 593 transitions. Word has length 101 [2020-07-20 17:29:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:50,306 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 593 transitions. [2020-07-20 17:29:50,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:29:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 593 transitions. [2020-07-20 17:29:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 17:29:50,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:50,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:29:50,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:50,526 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1649984501, now seen corresponding path program 1 times [2020-07-20 17:29:50,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:50,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118265450] [2020-07-20 17:29:50,529 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 17:29:50,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:29:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:50,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:29:50,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118265450] [2020-07-20 17:29:50,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:29:50,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:29:50,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122435964] [2020-07-20 17:29:50,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:29:50,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:29:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:29:50,655 INFO L87 Difference]: Start difference. First operand 437 states and 593 transitions. Second operand 3 states. [2020-07-20 17:29:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:51,391 INFO L93 Difference]: Finished difference Result 868 states and 1196 transitions. [2020-07-20 17:29:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:29:51,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-07-20 17:29:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:51,400 INFO L225 Difference]: With dead ends: 868 [2020-07-20 17:29:51,401 INFO L226 Difference]: Without dead ends: 866 [2020-07-20 17:29:51,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 17:29:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-07-20 17:29:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 580. [2020-07-20 17:29:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-07-20 17:29:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 816 transitions. [2020-07-20 17:29:51,449 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 816 transitions. Word has length 108 [2020-07-20 17:29:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:51,450 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 816 transitions. [2020-07-20 17:29:51,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:29:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 816 transitions. [2020-07-20 17:29:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-07-20 17:29:51,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:51,462 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, 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, 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] [2020-07-20 17:29:51,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:51,677 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash -445493319, now seen corresponding path program 1 times [2020-07-20 17:29:51,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:51,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672803317] [2020-07-20 17:29:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:51,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:29:51,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:29:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:29:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:29:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:51,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:29:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:29:52,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672803317] [2020-07-20 17:29:52,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:29:52,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 17:29:52,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708786693] [2020-07-20 17:29:52,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:29:52,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:29:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:29:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:29:52,075 INFO L87 Difference]: Start difference. First operand 580 states and 816 transitions. Second operand 7 states. [2020-07-20 17:29:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:29:53,186 INFO L93 Difference]: Finished difference Result 1460 states and 2120 transitions. [2020-07-20 17:29:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:29:53,188 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2020-07-20 17:29:53,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:29:53,201 INFO L225 Difference]: With dead ends: 1460 [2020-07-20 17:29:53,202 INFO L226 Difference]: Without dead ends: 886 [2020-07-20 17:29:53,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:29:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2020-07-20 17:29:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 882. [2020-07-20 17:29:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-07-20 17:29:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1276 transitions. [2020-07-20 17:29:53,277 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1276 transitions. Word has length 198 [2020-07-20 17:29:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:29:53,279 INFO L479 AbstractCegarLoop]: Abstraction has 882 states and 1276 transitions. [2020-07-20 17:29:53,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:29:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1276 transitions. [2020-07-20 17:29:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 17:29:53,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:29:53,295 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, 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, 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] [2020-07-20 17:29:53,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:29:53,510 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:29:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:29:53,510 INFO L82 PathProgramCache]: Analyzing trace with hash -641395475, now seen corresponding path program 1 times [2020-07-20 17:29:53,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:29:53,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253952467] [2020-07-20 17:29:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in