/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:30:15,252 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:30:15,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:30:15,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:30:15,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:30:15,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:30:15,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:30:15,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:30:15,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:30:15,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:30:15,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:30:15,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:30:15,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:30:15,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:30:15,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:30:15,325 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 01:30:15,339 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:30:15,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:30:15,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:30:15,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:30:15,341 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:30:15,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:30:15,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:30:15,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:30:15,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:30:15,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:30:15,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:30:15,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:30:15,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:30:15,343 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:30:15,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:30:15,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:30:15,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:30:15,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:30:15,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:30:15,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:30:15,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:30:15,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:30:15,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:30:15,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:30:15,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:30:15,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:30:15,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:15,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:30:15,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:30:15,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:30:15,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:30:15,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:30:15,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:30:15,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:30:15,646 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:30:15,646 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label51.c [2020-07-21 01:30:15,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78371410/4f1d7e8f96714652896eae5a98f35630/FLAG2ff0e406b [2020-07-21 01:30:16,264 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:30:16,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label51.c [2020-07-21 01:30:16,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78371410/4f1d7e8f96714652896eae5a98f35630/FLAG2ff0e406b [2020-07-21 01:30:16,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78371410/4f1d7e8f96714652896eae5a98f35630 [2020-07-21 01:30:16,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:30:16,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:30:16,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:30:16,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:30:16,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:30:16,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:30:16" (1/1) ... [2020-07-21 01:30:16,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376da73e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:16, skipping insertion in model container [2020-07-21 01:30:16,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:30:16" (1/1) ... [2020-07-21 01:30:16,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:30:16,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:30:17,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:30:17,039 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:30:17,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:30:17,261 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:30:17,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17 WrapperNode [2020-07-21 01:30:17,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:30:17,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:30:17,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:30:17,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:30:17,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (1/1) ... [2020-07-21 01:30:17,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:30:17,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:30:17,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:30:17,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:30:17,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (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 01:30:17,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:30:17,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:30:17,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 01:30:17,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:30:17,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 01:30:17,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:30:17,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:30:17,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:30:17,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:30:17,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:30:17,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:30:18,790 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:30:18,790 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:30:18,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:30:18 BoogieIcfgContainer [2020-07-21 01:30:18,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:30:18,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:30:18,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:30:18,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:30:18,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:30:16" (1/3) ... [2020-07-21 01:30:18,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daf3ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:30:18, skipping insertion in model container [2020-07-21 01:30:18,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:30:17" (2/3) ... [2020-07-21 01:30:18,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daf3ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:30:18, skipping insertion in model container [2020-07-21 01:30:18,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:30:18" (3/3) ... [2020-07-21 01:30:18,817 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label51.c [2020-07-21 01:30:18,827 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:30:18,836 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:30:18,850 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:30:18,876 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:30:18,876 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:30:18,877 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:30:18,877 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:30:18,877 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:30:18,877 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:30:18,877 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:30:18,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:30:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 01:30:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 01:30:18,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:18,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:30:18,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:18,921 INFO L82 PathProgramCache]: Analyzing trace with hash -689906609, now seen corresponding path program 1 times [2020-07-21 01:30:18,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:18,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946712124] [2020-07-21 01:30:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:19,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:30:19,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:19,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:30:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:19,147 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 01:30:19,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:30:19,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946712124] [2020-07-21 01:30:19,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:30:19,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:30:19,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087330573] [2020-07-21 01:30:19,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:30:19,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:30:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:30:19,175 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 01:30:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:20,205 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-21 01:30:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:30:20,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-07-21 01:30:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:20,241 INFO L225 Difference]: With dead ends: 571 [2020-07-21 01:30:20,242 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 01:30:20,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 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 01:30:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 01:30:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 01:30:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 01:30:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-21 01:30:20,375 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 56 [2020-07-21 01:30:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:20,379 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-21 01:30:20,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:30:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-21 01:30:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 01:30:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:20,387 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, 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] [2020-07-21 01:30:20,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:20,598 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 371731122, now seen corresponding path program 1 times [2020-07-21 01:30:20,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:20,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766696880] [2020-07-21 01:30:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:20,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:30:20,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:30:20,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:30:20,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:30:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:30:20,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766696880] [2020-07-21 01:30:20,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:30:20,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-07-21 01:30:20,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426470176] [2020-07-21 01:30:20,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:30:20,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:30:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:30:20,867 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 4 states. [2020-07-21 01:30:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:21,622 INFO L93 Difference]: Finished difference Result 586 states and 788 transitions. [2020-07-21 01:30:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:30:21,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-07-21 01:30:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:21,628 INFO L225 Difference]: With dead ends: 586 [2020-07-21 01:30:21,628 INFO L226 Difference]: Without dead ends: 584 [2020-07-21 01:30:21,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:30:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-21 01:30:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2020-07-21 01:30:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 01:30:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 786 transitions. [2020-07-21 01:30:21,680 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 786 transitions. Word has length 126 [2020-07-21 01:30:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:21,681 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 786 transitions. [2020-07-21 01:30:21,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:30:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 786 transitions. [2020-07-21 01:30:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-21 01:30:21,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:21,684 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, 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] [2020-07-21 01:30:21,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:21,900 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash 652113497, now seen corresponding path program 1 times [2020-07-21 01:30:21,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:21,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208604189] [2020-07-21 01:30:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:22,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:30:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:30:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:22,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:30:22,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208604189] [2020-07-21 01:30:22,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:30:22,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:30:22,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081051241] [2020-07-21 01:30:22,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:30:22,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:22,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:30:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:30:22,078 INFO L87 Difference]: Start difference. First operand 584 states and 786 transitions. Second operand 5 states. [2020-07-21 01:30:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:22,984 INFO L93 Difference]: Finished difference Result 1321 states and 1762 transitions. [2020-07-21 01:30:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:30:22,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-07-21 01:30:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:23,000 INFO L225 Difference]: With dead ends: 1321 [2020-07-21 01:30:23,000 INFO L226 Difference]: Without dead ends: 743 [2020-07-21 01:30:23,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:30:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-07-21 01:30:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 596. [2020-07-21 01:30:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-07-21 01:30:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 794 transitions. [2020-07-21 01:30:23,049 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 794 transitions. Word has length 129 [2020-07-21 01:30:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:23,049 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 794 transitions. [2020-07-21 01:30:23,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:30:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 794 transitions. [2020-07-21 01:30:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 01:30:23,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:23,053 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, 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] [2020-07-21 01:30:23,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:23,270 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1330273235, now seen corresponding path program 1 times [2020-07-21 01:30:23,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:23,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744781913] [2020-07-21 01:30:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:23,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:30:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:30:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:23,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:30:23,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744781913] [2020-07-21 01:30:23,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:30:23,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:30:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636082359] [2020-07-21 01:30:23,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:30:23,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:30:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:30:23,416 INFO L87 Difference]: Start difference. First operand 596 states and 794 transitions. Second operand 3 states. [2020-07-21 01:30:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:24,120 INFO L93 Difference]: Finished difference Result 1337 states and 1916 transitions. [2020-07-21 01:30:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:30:24,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-07-21 01:30:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:24,127 INFO L225 Difference]: With dead ends: 1337 [2020-07-21 01:30:24,128 INFO L226 Difference]: Without dead ends: 890 [2020-07-21 01:30:24,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:30:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-07-21 01:30:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-07-21 01:30:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-07-21 01:30:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1202 transitions. [2020-07-21 01:30:24,161 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1202 transitions. Word has length 135 [2020-07-21 01:30:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:24,162 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1202 transitions. [2020-07-21 01:30:24,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:30:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1202 transitions. [2020-07-21 01:30:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 01:30:24,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:24,167 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:30:24,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:24,381 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2062598314, now seen corresponding path program 1 times [2020-07-21 01:30:24,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:24,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10192413] [2020-07-21 01:30:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:24,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:30:24,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:24,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:30:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 01:30:24,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:30:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 01:30:24,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10192413] [2020-07-21 01:30:24,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:30:24,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2020-07-21 01:30:24,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073776043] [2020-07-21 01:30:24,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:30:24,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:30:24,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:30:24,707 INFO L87 Difference]: Start difference. First operand 888 states and 1202 transitions. Second operand 5 states. [2020-07-21 01:30:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:25,560 INFO L93 Difference]: Finished difference Result 1939 states and 2687 transitions. [2020-07-21 01:30:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:30:25,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-07-21 01:30:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:25,576 INFO L225 Difference]: With dead ends: 1939 [2020-07-21 01:30:25,576 INFO L226 Difference]: Without dead ends: 1200 [2020-07-21 01:30:25,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 388 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:30:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-07-21 01:30:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1190. [2020-07-21 01:30:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-07-21 01:30:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1474 transitions. [2020-07-21 01:30:25,643 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1474 transitions. Word has length 199 [2020-07-21 01:30:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:25,644 INFO L479 AbstractCegarLoop]: Abstraction has 1190 states and 1474 transitions. [2020-07-21 01:30:25,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:30:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1474 transitions. [2020-07-21 01:30:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-21 01:30:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:25,658 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, 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, 1, 1, 1, 1, 1, 1, 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 01:30:25,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:25,873 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash 538749421, now seen corresponding path program 1 times [2020-07-21 01:30:25,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:25,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367928292] [2020-07-21 01:30:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:26,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:30:26,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:26,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:30:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:26,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:30:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:26,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367928292] [2020-07-21 01:30:26,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:30:26,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 01:30:26,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254356144] [2020-07-21 01:30:26,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:30:26,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:26,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:30:26,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:30:26,232 INFO L87 Difference]: Start difference. First operand 1190 states and 1474 transitions. Second operand 8 states. [2020-07-21 01:30:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:27,606 INFO L93 Difference]: Finished difference Result 2841 states and 3740 transitions. [2020-07-21 01:30:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:30:27,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 216 [2020-07-21 01:30:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:27,618 INFO L225 Difference]: With dead ends: 2841 [2020-07-21 01:30:27,618 INFO L226 Difference]: Without dead ends: 1800 [2020-07-21 01:30:27,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:30:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2020-07-21 01:30:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1645. [2020-07-21 01:30:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-07-21 01:30:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2115 transitions. [2020-07-21 01:30:27,695 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2115 transitions. Word has length 216 [2020-07-21 01:30:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:27,696 INFO L479 AbstractCegarLoop]: Abstraction has 1645 states and 2115 transitions. [2020-07-21 01:30:27,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:30:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2115 transitions. [2020-07-21 01:30:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-21 01:30:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:27,702 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:27,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:27,917 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash 458229134, now seen corresponding path program 1 times [2020-07-21 01:30:27,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:27,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228801742] [2020-07-21 01:30:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:28,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:30:28,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:28,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:30:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:28,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:30:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:28,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228801742] [2020-07-21 01:30:28,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:30:28,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 01:30:28,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485651129] [2020-07-21 01:30:28,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:30:28,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:30:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:30:28,282 INFO L87 Difference]: Start difference. First operand 1645 states and 2115 transitions. Second operand 6 states. [2020-07-21 01:30:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:30:29,350 INFO L93 Difference]: Finished difference Result 3175 states and 4193 transitions. [2020-07-21 01:30:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:30:29,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 267 [2020-07-21 01:30:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:30:29,361 INFO L225 Difference]: With dead ends: 3175 [2020-07-21 01:30:29,361 INFO L226 Difference]: Without dead ends: 1679 [2020-07-21 01:30:29,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 530 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:30:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2020-07-21 01:30:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1504. [2020-07-21 01:30:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1504 states. [2020-07-21 01:30:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1777 transitions. [2020-07-21 01:30:29,445 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1777 transitions. Word has length 267 [2020-07-21 01:30:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:30:29,446 INFO L479 AbstractCegarLoop]: Abstraction has 1504 states and 1777 transitions. [2020-07-21 01:30:29,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:30:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1777 transitions. [2020-07-21 01:30:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-21 01:30:29,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:30:29,452 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:29,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:29,666 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:30:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:30:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1951155213, now seen corresponding path program 1 times [2020-07-21 01:30:29,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:30:29,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327480523] [2020-07-21 01:30:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:30:29,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:30:29,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:30:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 01:30:29,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:30:29,833 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:30:29,837 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:30:45,604 WARN L193 SmtUtils]: Spent 15.72 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 01:30:45,649 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:30:45,884 INFO L501 QuantifierPusher]: Distributing 6 conjuncts over 3 disjuncts [2020-07-21 01:30:45,884 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:30:45,886 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 01:30:45,887 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 01:30:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:30:46,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:30:46,329 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 01:30:46,655 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:30:46,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:30:46,661 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:30:46,662 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:30:46,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:30:52,861 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2020-07-21 01:30:52,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327480523] [2020-07-21 01:30:52,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:30:52,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 01:30:52,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764104849] [2020-07-21 01:30:52,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:30:52,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:30:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:30:52,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:30:52,871 INFO L87 Difference]: Start difference. First operand 1504 states and 1777 transitions. Second operand 9 states. [2020-07-21 01:30:55,236 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-07-21 01:31:50,206 WARN L193 SmtUtils]: Spent 36.62 s on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-07-21 01:31:51,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:51,193 INFO L93 Difference]: Finished difference Result 3982 states and 4967 transitions. [2020-07-21 01:31:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 01:31:51,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 276 [2020-07-21 01:31:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:51,213 INFO L225 Difference]: With dead ends: 3982 [2020-07-21 01:31:51,213 INFO L226 Difference]: Without dead ends: 2600 [2020-07-21 01:31:51,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 455 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:31:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2020-07-21 01:31:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2376. [2020-07-21 01:31:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2376 states. [2020-07-21 01:31:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 2865 transitions. [2020-07-21 01:31:51,299 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 2865 transitions. Word has length 276 [2020-07-21 01:31:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:51,299 INFO L479 AbstractCegarLoop]: Abstraction has 2376 states and 2865 transitions. [2020-07-21 01:31:51,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:31:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 2865 transitions. [2020-07-21 01:31:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-07-21 01:31:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:51,309 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, 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, 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] [2020-07-21 01:31:51,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:51,510 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash -685542405, now seen corresponding path program 1 times [2020-07-21 01:31:51,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:51,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231784558] [2020-07-21 01:31:51,512 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 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 01:31:51,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:31:51,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:51,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:31:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 01:31:51,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:31:51,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231784558] [2020-07-21 01:31:51,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:31:51,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:31:51,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342183387] [2020-07-21 01:31:51,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:31:51,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:31:51,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:31:51,808 INFO L87 Difference]: Start difference. First operand 2376 states and 2865 transitions. Second operand 3 states. [2020-07-21 01:31:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:52,715 INFO L93 Difference]: Finished difference Result 4603 states and 5580 transitions. [2020-07-21 01:31:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:31:52,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 312 [2020-07-21 01:31:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:52,728 INFO L225 Difference]: With dead ends: 4603 [2020-07-21 01:31:52,728 INFO L226 Difference]: Without dead ends: 2376 [2020-07-21 01:31:52,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 310 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 01:31:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2020-07-21 01:31:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2084. [2020-07-21 01:31:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2020-07-21 01:31:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2456 transitions. [2020-07-21 01:31:52,798 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2456 transitions. Word has length 312 [2020-07-21 01:31:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:52,799 INFO L479 AbstractCegarLoop]: Abstraction has 2084 states and 2456 transitions. [2020-07-21 01:31:52,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:31:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2456 transitions. [2020-07-21 01:31:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 01:31:52,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:52,810 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, 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, 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] [2020-07-21 01:31:53,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:53,024 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash -819512655, now seen corresponding path program 1 times [2020-07-21 01:31:53,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:53,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433319092] [2020-07-21 01:31:53,026 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 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 01:31:53,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:53,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:31:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:53,206 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:53,207 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:53,208 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:31:53,210 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:31:53,211 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:53,212 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:53,213 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:31:53,214 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:32:06,960 WARN L193 SmtUtils]: Spent 13.71 s on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-07-21 01:32:06,997 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:32:09,110 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:32:09,111 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:09,112 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:09,146 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-21 01:32:09,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:32:09,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:32:09,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:32:09,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:32:09,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:09,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:32:09,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:32:09,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:32:09,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:32:09,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:32:09,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:32:09,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:32:09,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:32:09,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433319092] [2020-07-21 01:32:09,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:32:09,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 01:32:09,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196005243] [2020-07-21 01:32:09,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:32:09,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:09,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:32:09,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2020-07-21 01:32:09,880 INFO L87 Difference]: Start difference. First operand 2084 states and 2456 transitions. Second operand 8 states. [2020-07-21 01:32:10,900 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 01:36:20,697 WARN L193 SmtUtils]: Spent 26.24 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-07-21 01:36:47,108 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-07-21 01:36:57,585 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-07-21 01:37:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:22,375 INFO L93 Difference]: Finished difference Result 4774 states and 5756 transitions. [2020-07-21 01:37:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 01:37:22,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 367 [2020-07-21 01:37:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:22,398 INFO L225 Difference]: With dead ends: 4774 [2020-07-21 01:37:22,399 INFO L226 Difference]: Without dead ends: 2839 [2020-07-21 01:37:22,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=136, Invalid=283, Unknown=1, NotChecked=0, Total=420 [2020-07-21 01:37:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2020-07-21 01:37:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2678. [2020-07-21 01:37:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2678 states. [2020-07-21 01:37:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3114 transitions. [2020-07-21 01:37:22,492 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3114 transitions. Word has length 367 [2020-07-21 01:37:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:22,493 INFO L479 AbstractCegarLoop]: Abstraction has 2678 states and 3114 transitions. [2020-07-21 01:37:22,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:37:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3114 transitions. [2020-07-21 01:37:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-21 01:37:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:22,510 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, 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, 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, 1, 1] [2020-07-21 01:37:22,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:22,725 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -797353154, now seen corresponding path program 1 times [2020-07-21 01:37:22,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:22,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423931077] [2020-07-21 01:37:22,726 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:22,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:37:22,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:37:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:23,091 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:23,092 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:37:23,092 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:37:23,093 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:23,094 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:37:23,095 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:23,097 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:23,098 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:43,821 WARN L193 SmtUtils]: Spent 20.62 s on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-07-21 01:37:43,894 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:46,135 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-07-21 01:37:46,235 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:37:46,236 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:46,236 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:46,374 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 152 proven. 197 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 01:37:46,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:47,118 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-07-21 01:37:47,254 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 01:37:47,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:47,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:47,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:47,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:49,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:49,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:49,701 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 01:37:50,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:50,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 7 conjuncts [2020-07-21 01:37:50,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:50,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 7 conjuncts [2020-07-21 01:37:50,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:50,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:50,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:50,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:50,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:50,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 01:37:50,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423931077] [2020-07-21 01:37:50,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:50,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-21 01:37:50,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794644886] [2020-07-21 01:37:50,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:37:50,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:50,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:37:50,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-21 01:37:50,680 INFO L87 Difference]: Start difference. First operand 2678 states and 3114 transitions. Second operand 12 states. [2020-07-21 01:38:46,385 WARN L193 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-07-21 01:39:41,911 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-07-21 01:42:01,038 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 01:42:52,381 WARN L193 SmtUtils]: Spent 14.35 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 01:44:07,628 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-07-21 01:44:12,271 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-21 01:44:34,292 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 14