/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:29:09,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:29:09,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:29:09,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:29:09,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:29:09,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:29:09,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:29:09,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:29:09,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:29:09,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:29:09,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:29:09,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:29:09,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:29:09,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:29:09,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:29:09,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:29:09,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:29:09,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:29:09,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:29:09,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:29:09,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:29:09,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:29:09,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:29:09,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:29:09,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:29:09,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:29:09,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:29:09,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:29:09,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:29:09,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:29:09,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:29:09,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:29:09,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:29:09,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:29:09,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:29:09,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:29:09,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:29:09,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:29:09,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:29:09,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:29:09,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:29:09,297 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 12:29:09,320 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:29:09,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:29:09,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:29:09,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:29:09,323 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:29:09,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:29:09,324 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:29:09,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:29:09,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:29:09,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:29:09,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:29:09,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:29:09,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:29:09,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:29:09,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:29:09,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:29:09,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:29:09,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:29:09,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:29:09,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:29:09,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:29:09,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:29:09,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:29:09,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:29:09,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:29:09,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:29:09,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:09,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:29:09,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:29:09,329 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 -> NOT_INCREMENTALLY [2020-07-21 12:29:09,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:29:09,645 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:29:09,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:29:09,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:29:09,651 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:29:09,651 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:29:09,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4079d95/063447b2d69b446b9ab4ededa4c16b76/FLAG2882b9235 [2020-07-21 12:29:10,410 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:29:10,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:29:10,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4079d95/063447b2d69b446b9ab4ededa4c16b76/FLAG2882b9235 [2020-07-21 12:29:10,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4079d95/063447b2d69b446b9ab4ededa4c16b76 [2020-07-21 12:29:10,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:29:10,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:29:10,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:29:10,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:29:10,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:29:10,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:29:10" (1/1) ... [2020-07-21 12:29:10,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152045d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:10, skipping insertion in model container [2020-07-21 12:29:10,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:29:10" (1/1) ... [2020-07-21 12:29:10,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:29:10,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:29:12,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:29:12,303 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:29:13,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:29:13,964 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:29:13,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13 WrapperNode [2020-07-21 12:29:13,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:29:13,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:29:13,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:29:13,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:29:13,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:13,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:14,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:14,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:14,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:14,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:14,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... [2020-07-21 12:29:14,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:29:14,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:29:14,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:29:14,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:29:14,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:29:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:29:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:29:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:29:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:29:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:29:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:29:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 12:29:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:29:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:29:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:29:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:29:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:29:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:29:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:29:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:29:14,267 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:29:14,267 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:29:14,267 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:29:14,267 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:29:14,268 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:29:14,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:29:14,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:29:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:29:18,269 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:29:18,270 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:29:18,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:29:18 BoogieIcfgContainer [2020-07-21 12:29:18,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:29:18,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:29:18,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:29:18,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:29:18,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:29:10" (1/3) ... [2020-07-21 12:29:18,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1390ad67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:29:18, skipping insertion in model container [2020-07-21 12:29:18,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:13" (2/3) ... [2020-07-21 12:29:18,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1390ad67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:29:18, skipping insertion in model container [2020-07-21 12:29:18,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:29:18" (3/3) ... [2020-07-21 12:29:18,296 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:29:18,307 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:29:18,322 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:29:18,338 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:29:18,373 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:29:18,373 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:29:18,374 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:29:18,374 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:29:18,374 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:29:18,374 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:29:18,374 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:29:18,374 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:29:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-21 12:29:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 12:29:18,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:18,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:18,476 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-21 12:29:18,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:18,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414789012] [2020-07-21 12:29:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 3055 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:19,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:19,466 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 12:29:19,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:19,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414789012] [2020-07-21 12:29:19,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:19,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:19,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325176182] [2020-07-21 12:29:19,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:19,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:19,492 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 3 states. [2020-07-21 12:29:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:19,874 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-21 12:29:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:19,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 12:29:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:19,923 INFO L225 Difference]: With dead ends: 2488 [2020-07-21 12:29:19,923 INFO L226 Difference]: Without dead ends: 2186 [2020-07-21 12:29:19,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 12:29:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-21 12:29:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-21 12:29:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-21 12:29:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-21 12:29:20,095 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-21 12:29:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:20,098 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-21 12:29:20,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-21 12:29:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 12:29:20,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:20,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:20,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:20,329 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:20,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:20,330 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-21 12:29:20,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:20,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496246284] [2020-07-21 12:29:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:29:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:21,259 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 12:29:21,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:21,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496246284] [2020-07-21 12:29:21,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:21,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:29:21,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170650720] [2020-07-21 12:29:21,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:29:21,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:29:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:29:21,264 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 4 states. [2020-07-21 12:29:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:21,641 INFO L93 Difference]: Finished difference Result 6378 states and 10379 transitions. [2020-07-21 12:29:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:29:21,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 12:29:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:21,664 INFO L225 Difference]: With dead ends: 6378 [2020-07-21 12:29:21,664 INFO L226 Difference]: Without dead ends: 4271 [2020-07-21 12:29:21,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:29:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2020-07-21 12:29:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 4269. [2020-07-21 12:29:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4269 states. [2020-07-21 12:29:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 6928 transitions. [2020-07-21 12:29:21,839 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 6928 transitions. Word has length 496 [2020-07-21 12:29:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:21,840 INFO L479 AbstractCegarLoop]: Abstraction has 4269 states and 6928 transitions. [2020-07-21 12:29:21,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:29:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 6928 transitions. [2020-07-21 12:29:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 12:29:21,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:21,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:22,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:22,073 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1666408241, now seen corresponding path program 1 times [2020-07-21 12:29:22,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:22,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497460334] [2020-07-21 12:29:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:22,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:22,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:23,002 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 12:29:23,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:23,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497460334] [2020-07-21 12:29:23,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:23,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:23,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90963031] [2020-07-21 12:29:23,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:23,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:23,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:23,006 INFO L87 Difference]: Start difference. First operand 4269 states and 6928 transitions. Second operand 3 states. [2020-07-21 12:29:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:23,400 INFO L93 Difference]: Finished difference Result 12445 states and 20134 transitions. [2020-07-21 12:29:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:23,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 12:29:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:23,442 INFO L225 Difference]: With dead ends: 12445 [2020-07-21 12:29:23,442 INFO L226 Difference]: Without dead ends: 8341 [2020-07-21 12:29:23,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 12:29:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2020-07-21 12:29:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 8339. [2020-07-21 12:29:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8339 states. [2020-07-21 12:29:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8339 states to 8339 states and 13465 transitions. [2020-07-21 12:29:23,851 INFO L78 Accepts]: Start accepts. Automaton has 8339 states and 13465 transitions. Word has length 498 [2020-07-21 12:29:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:23,851 INFO L479 AbstractCegarLoop]: Abstraction has 8339 states and 13465 transitions. [2020-07-21 12:29:23,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8339 states and 13465 transitions. [2020-07-21 12:29:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:29:23,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:23,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:24,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:24,094 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash -285544027, now seen corresponding path program 1 times [2020-07-21 12:29:24,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:24,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074087763] [2020-07-21 12:29:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:24,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:24,740 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 12:29:24,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:24,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074087763] [2020-07-21 12:29:24,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:24,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:24,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868623241] [2020-07-21 12:29:24,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:24,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:24,745 INFO L87 Difference]: Start difference. First operand 8339 states and 13465 transitions. Second operand 3 states. [2020-07-21 12:29:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:25,184 INFO L93 Difference]: Finished difference Result 24245 states and 38981 transitions. [2020-07-21 12:29:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:25,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 12:29:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:25,275 INFO L225 Difference]: With dead ends: 24245 [2020-07-21 12:29:25,275 INFO L226 Difference]: Without dead ends: 16295 [2020-07-21 12:29:25,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 12:29:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2020-07-21 12:29:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 8391. [2020-07-21 12:29:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8391 states. [2020-07-21 12:29:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 13545 transitions. [2020-07-21 12:29:26,527 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 13545 transitions. Word has length 499 [2020-07-21 12:29:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:26,527 INFO L479 AbstractCegarLoop]: Abstraction has 8391 states and 13545 transitions. [2020-07-21 12:29:26,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 13545 transitions. [2020-07-21 12:29:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 12:29:26,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:26,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:26,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:26,782 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133332, now seen corresponding path program 1 times [2020-07-21 12:29:26,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:26,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914611742] [2020-07-21 12:29:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:27,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:27,579 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 12:29:27,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:27,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914611742] [2020-07-21 12:29:27,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:27,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:27,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418907457] [2020-07-21 12:29:27,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:27,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:27,582 INFO L87 Difference]: Start difference. First operand 8391 states and 13545 transitions. Second operand 3 states. [2020-07-21 12:29:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:28,081 INFO L93 Difference]: Finished difference Result 24659 states and 39722 transitions. [2020-07-21 12:29:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:28,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 12:29:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:28,123 INFO L225 Difference]: With dead ends: 24659 [2020-07-21 12:29:28,124 INFO L226 Difference]: Without dead ends: 16499 [2020-07-21 12:29:28,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 12:29:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16499 states. [2020-07-21 12:29:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16499 to 16497. [2020-07-21 12:29:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16497 states. [2020-07-21 12:29:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16497 states to 16497 states and 26512 transitions. [2020-07-21 12:29:28,681 INFO L78 Accepts]: Start accepts. Automaton has 16497 states and 26512 transitions. Word has length 500 [2020-07-21 12:29:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:28,689 INFO L479 AbstractCegarLoop]: Abstraction has 16497 states and 26512 transitions. [2020-07-21 12:29:28,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16497 states and 26512 transitions. [2020-07-21 12:29:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 12:29:28,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:28,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:28,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:28,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:28,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1506664655, now seen corresponding path program 1 times [2020-07-21 12:29:28,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:28,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345564857] [2020-07-21 12:29:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:29,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:29,667 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 12:29:29,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:29,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345564857] [2020-07-21 12:29:29,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:29,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:29,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534875231] [2020-07-21 12:29:29,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:29,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:29,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:29,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:29,671 INFO L87 Difference]: Start difference. First operand 16497 states and 26512 transitions. Second operand 3 states. [2020-07-21 12:29:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:30,466 INFO L93 Difference]: Finished difference Result 48031 states and 76892 transitions. [2020-07-21 12:29:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:30,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 12:29:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:30,549 INFO L225 Difference]: With dead ends: 48031 [2020-07-21 12:29:30,550 INFO L226 Difference]: Without dead ends: 32271 [2020-07-21 12:29:30,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 12:29:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2020-07-21 12:29:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 16655. [2020-07-21 12:29:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16655 states. [2020-07-21 12:29:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16655 states to 16655 states and 26750 transitions. [2020-07-21 12:29:31,225 INFO L78 Accepts]: Start accepts. Automaton has 16655 states and 26750 transitions. Word has length 500 [2020-07-21 12:29:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:31,225 INFO L479 AbstractCegarLoop]: Abstraction has 16655 states and 26750 transitions. [2020-07-21 12:29:31,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16655 states and 26750 transitions. [2020-07-21 12:29:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 12:29:31,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:31,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:31,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:31,483 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2112687978, now seen corresponding path program 1 times [2020-07-21 12:29:31,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:31,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675507765] [2020-07-21 12:29:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:32,145 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 12:29:32,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:32,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675507765] [2020-07-21 12:29:32,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:32,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:32,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814101159] [2020-07-21 12:29:32,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:32,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:32,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:32,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:32,148 INFO L87 Difference]: Start difference. First operand 16655 states and 26750 transitions. Second operand 3 states. [2020-07-21 12:29:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:32,783 INFO L93 Difference]: Finished difference Result 48245 states and 77171 transitions. [2020-07-21 12:29:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:32,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 12:29:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:32,865 INFO L225 Difference]: With dead ends: 48245 [2020-07-21 12:29:32,865 INFO L226 Difference]: Without dead ends: 32461 [2020-07-21 12:29:32,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 12:29:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32461 states. [2020-07-21 12:29:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32461 to 16845. [2020-07-21 12:29:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16845 states. [2020-07-21 12:29:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16845 states to 16845 states and 26992 transitions. [2020-07-21 12:29:34,592 INFO L78 Accepts]: Start accepts. Automaton has 16845 states and 26992 transitions. Word has length 501 [2020-07-21 12:29:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:34,593 INFO L479 AbstractCegarLoop]: Abstraction has 16845 states and 26992 transitions. [2020-07-21 12:29:34,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 16845 states and 26992 transitions. [2020-07-21 12:29:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:34,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:34,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:34,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:34,858 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:34,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:34,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1153414160, now seen corresponding path program 1 times [2020-07-21 12:29:34,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:34,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642095583] [2020-07-21 12:29:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:35,635 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 12:29:35,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:35,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642095583] [2020-07-21 12:29:35,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:35,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:35,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872261270] [2020-07-21 12:29:35,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:35,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:35,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:35,639 INFO L87 Difference]: Start difference. First operand 16845 states and 26992 transitions. Second operand 3 states. [2020-07-21 12:29:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:36,204 INFO L93 Difference]: Finished difference Result 23841 states and 38802 transitions. [2020-07-21 12:29:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:36,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 12:29:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:36,241 INFO L225 Difference]: With dead ends: 23841 [2020-07-21 12:29:36,241 INFO L226 Difference]: Without dead ends: 20343 [2020-07-21 12:29:36,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 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 12:29:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20343 states. [2020-07-21 12:29:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20343 to 20333. [2020-07-21 12:29:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20333 states. [2020-07-21 12:29:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20333 states to 20333 states and 32832 transitions. [2020-07-21 12:29:36,993 INFO L78 Accepts]: Start accepts. Automaton has 20333 states and 32832 transitions. Word has length 502 [2020-07-21 12:29:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:36,995 INFO L479 AbstractCegarLoop]: Abstraction has 20333 states and 32832 transitions. [2020-07-21 12:29:36,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 20333 states and 32832 transitions. [2020-07-21 12:29:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:37,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:37,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:37,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:37,232 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1306882671, now seen corresponding path program 1 times [2020-07-21 12:29:37,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:37,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143816062] [2020-07-21 12:29:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:29:37,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:38,326 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 12:29:38,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:38,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143816062] [2020-07-21 12:29:38,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:38,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:29:38,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205263165] [2020-07-21 12:29:38,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:29:38,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:29:38,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:29:38,329 INFO L87 Difference]: Start difference. First operand 20333 states and 32832 transitions. Second operand 8 states. [2020-07-21 12:29:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:42,066 INFO L93 Difference]: Finished difference Result 53184 states and 85495 transitions. [2020-07-21 12:29:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:29:42,067 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 502 [2020-07-21 12:29:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:42,268 INFO L225 Difference]: With dead ends: 53184 [2020-07-21 12:29:42,269 INFO L226 Difference]: Without dead ends: 37224 [2020-07-21 12:29:42,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:29:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37224 states. [2020-07-21 12:29:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37224 to 21922. [2020-07-21 12:29:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21922 states. [2020-07-21 12:29:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21922 states to 21922 states and 34965 transitions. [2020-07-21 12:29:43,182 INFO L78 Accepts]: Start accepts. Automaton has 21922 states and 34965 transitions. Word has length 502 [2020-07-21 12:29:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:43,182 INFO L479 AbstractCegarLoop]: Abstraction has 21922 states and 34965 transitions. [2020-07-21 12:29:43,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:29:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21922 states and 34965 transitions. [2020-07-21 12:29:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:43,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:43,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:43,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:43,409 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1267349537, now seen corresponding path program 1 times [2020-07-21 12:29:43,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:43,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452358281] [2020-07-21 12:29:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:44,023 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 12:29:44,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:44,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452358281] [2020-07-21 12:29:44,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:44,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:44,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519598380] [2020-07-21 12:29:44,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:44,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:44,025 INFO L87 Difference]: Start difference. First operand 21922 states and 34965 transitions. Second operand 3 states. [2020-07-21 12:29:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:45,097 INFO L93 Difference]: Finished difference Result 47272 states and 75401 transitions. [2020-07-21 12:29:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:45,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 12:29:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:45,131 INFO L225 Difference]: With dead ends: 47272 [2020-07-21 12:29:45,131 INFO L226 Difference]: Without dead ends: 30591 [2020-07-21 12:29:45,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 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 12:29:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30591 states. [2020-07-21 12:29:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30591 to 27917. [2020-07-21 12:29:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27917 states. [2020-07-21 12:29:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27917 states to 27917 states and 44748 transitions. [2020-07-21 12:29:46,458 INFO L78 Accepts]: Start accepts. Automaton has 27917 states and 44748 transitions. Word has length 502 [2020-07-21 12:29:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:46,459 INFO L479 AbstractCegarLoop]: Abstraction has 27917 states and 44748 transitions. [2020-07-21 12:29:46,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 27917 states and 44748 transitions. [2020-07-21 12:29:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:46,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:46,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:46,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:46,682 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash -612346041, now seen corresponding path program 1 times [2020-07-21 12:29:46,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:46,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115718650] [2020-07-21 12:29:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:47,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:47,343 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 12:29:47,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:47,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115718650] [2020-07-21 12:29:47,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:47,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:47,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147388393] [2020-07-21 12:29:47,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:47,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:47,346 INFO L87 Difference]: Start difference. First operand 27917 states and 44748 transitions. Second operand 3 states. [2020-07-21 12:29:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:49,899 INFO L93 Difference]: Finished difference Result 81254 states and 130051 transitions. [2020-07-21 12:29:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:49,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 12:29:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:49,967 INFO L225 Difference]: With dead ends: 81254 [2020-07-21 12:29:49,967 INFO L226 Difference]: Without dead ends: 53711 [2020-07-21 12:29:50,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 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 12:29:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53711 states. [2020-07-21 12:29:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53711 to 53709. [2020-07-21 12:29:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53709 states. [2020-07-21 12:29:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53709 states to 53709 states and 85672 transitions. [2020-07-21 12:29:52,176 INFO L78 Accepts]: Start accepts. Automaton has 53709 states and 85672 transitions. Word has length 502 [2020-07-21 12:29:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:52,176 INFO L479 AbstractCegarLoop]: Abstraction has 53709 states and 85672 transitions. [2020-07-21 12:29:52,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 53709 states and 85672 transitions. [2020-07-21 12:29:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:52,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:52,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:29:52,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:52,426 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:52,427 INFO L82 PathProgramCache]: Analyzing trace with hash -908406108, now seen corresponding path program 1 times [2020-07-21 12:29:52,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:52,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122467688] [2020-07-21 12:29:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:29:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:53,043 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 12:29:53,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:53,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122467688] [2020-07-21 12:29:53,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:53,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:29:53,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678528434] [2020-07-21 12:29:53,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:29:53,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:53,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:29:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:29:53,046 INFO L87 Difference]: Start difference. First operand 53709 states and 85672 transitions. Second operand 4 states. [2020-07-21 12:29:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:58,834 INFO L93 Difference]: Finished difference Result 153098 states and 243294 transitions. [2020-07-21 12:29:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:29:58,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 12:29:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:58,942 INFO L225 Difference]: With dead ends: 153098 [2020-07-21 12:29:58,942 INFO L226 Difference]: Without dead ends: 103792 [2020-07-21 12:29:58,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:29:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103792 states. [2020-07-21 12:30:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103792 to 56397. [2020-07-21 12:30:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56397 states. [2020-07-21 12:30:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56397 states to 56397 states and 90361 transitions. [2020-07-21 12:30:01,731 INFO L78 Accepts]: Start accepts. Automaton has 56397 states and 90361 transitions. Word has length 502 [2020-07-21 12:30:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:01,732 INFO L479 AbstractCegarLoop]: Abstraction has 56397 states and 90361 transitions. [2020-07-21 12:30:01,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:30:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 56397 states and 90361 transitions. [2020-07-21 12:30:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 12:30:01,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:01,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:02,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:02,009 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash 712877757, now seen corresponding path program 1 times [2020-07-21 12:30:02,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:02,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777812963] [2020-07-21 12:30:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:02,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 3082 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:30:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:02,828 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 12:30:02,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:02,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777812963] [2020-07-21 12:30:02,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:02,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:30:02,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121870081] [2020-07-21 12:30:02,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:30:02,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:02,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:30:02,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:30:02,830 INFO L87 Difference]: Start difference. First operand 56397 states and 90361 transitions. Second operand 8 states. [2020-07-21 12:30:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:12,496 INFO L93 Difference]: Finished difference Result 156938 states and 253532 transitions. [2020-07-21 12:30:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:30:12,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 504 [2020-07-21 12:30:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:12,665 INFO L225 Difference]: With dead ends: 156938 [2020-07-21 12:30:12,665 INFO L226 Difference]: Without dead ends: 138344 [2020-07-21 12:30:12,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:30:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138344 states. [2020-07-21 12:30:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138344 to 71497. [2020-07-21 12:30:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71497 states. [2020-07-21 12:30:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71497 states to 71497 states and 114433 transitions. [2020-07-21 12:30:16,458 INFO L78 Accepts]: Start accepts. Automaton has 71497 states and 114433 transitions. Word has length 504 [2020-07-21 12:30:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:16,458 INFO L479 AbstractCegarLoop]: Abstraction has 71497 states and 114433 transitions. [2020-07-21 12:30:16,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:30:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 71497 states and 114433 transitions. [2020-07-21 12:30:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 12:30:16,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:16,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:16,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:16,696 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 338072247, now seen corresponding path program 1 times [2020-07-21 12:30:16,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:16,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254462535] [2020-07-21 12:30:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:30:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:17,301 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 12:30:17,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:17,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254462535] [2020-07-21 12:30:17,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:17,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:17,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267268639] [2020-07-21 12:30:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:17,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:17,304 INFO L87 Difference]: Start difference. First operand 71497 states and 114433 transitions. Second operand 3 states. [2020-07-21 12:30:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:23,991 INFO L93 Difference]: Finished difference Result 163121 states and 260405 transitions. [2020-07-21 12:30:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:30:23,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 12:30:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:24,105 INFO L225 Difference]: With dead ends: 163121 [2020-07-21 12:30:24,105 INFO L226 Difference]: Without dead ends: 103347 [2020-07-21 12:30:24,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 12:30:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103347 states. [2020-07-21 12:30:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103347 to 93629. [2020-07-21 12:30:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93629 states. [2020-07-21 12:30:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93629 states to 93629 states and 150227 transitions. [2020-07-21 12:30:29,180 INFO L78 Accepts]: Start accepts. Automaton has 93629 states and 150227 transitions. Word has length 504 [2020-07-21 12:30:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:29,180 INFO L479 AbstractCegarLoop]: Abstraction has 93629 states and 150227 transitions. [2020-07-21 12:30:29,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:30:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 93629 states and 150227 transitions. [2020-07-21 12:30:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 12:30:29,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:29,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:29,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:29,412 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:29,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1714396053, now seen corresponding path program 1 times [2020-07-21 12:30:29,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:29,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885046567] [2020-07-21 12:30:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 3077 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:30:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:30,475 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 12:30:30,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:30,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885046567] [2020-07-21 12:30:30,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:30,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:30:30,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369395430] [2020-07-21 12:30:30,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:30:30,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:30:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:30:30,478 INFO L87 Difference]: Start difference. First operand 93629 states and 150227 transitions. Second operand 4 states. [2020-07-21 12:30:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:41,652 INFO L93 Difference]: Finished difference Result 278684 states and 447330 transitions. [2020-07-21 12:30:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:30:41,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 12:30:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:41,865 INFO L225 Difference]: With dead ends: 278684 [2020-07-21 12:30:41,866 INFO L226 Difference]: Without dead ends: 185070 [2020-07-21 12:30:41,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:30:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185070 states. [2020-07-21 12:30:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185070 to 185068. [2020-07-21 12:30:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185068 states. [2020-07-21 12:30:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185068 states to 185068 states and 296205 transitions. [2020-07-21 12:30:55,876 INFO L78 Accepts]: Start accepts. Automaton has 185068 states and 296205 transitions. Word has length 505 [2020-07-21 12:30:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:55,877 INFO L479 AbstractCegarLoop]: Abstraction has 185068 states and 296205 transitions. [2020-07-21 12:30:55,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:30:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 185068 states and 296205 transitions. [2020-07-21 12:30:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 12:30:55,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:55,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:30:56,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:56,136 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1653172198, now seen corresponding path program 1 times [2020-07-21 12:30:56,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:56,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590871643] [2020-07-21 12:30:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:30:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:56,827 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 12:30:56,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:56,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590871643] [2020-07-21 12:30:56,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:56,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:56,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51333702] [2020-07-21 12:30:56,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:56,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:56,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:56,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:56,829 INFO L87 Difference]: Start difference. First operand 185068 states and 296205 transitions. Second operand 3 states. [2020-07-21 12:31:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:19,507 INFO L93 Difference]: Finished difference Result 549193 states and 878692 transitions. [2020-07-21 12:31:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:31:19,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 12:31:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:19,975 INFO L225 Difference]: With dead ends: 549193 [2020-07-21 12:31:19,976 INFO L226 Difference]: Without dead ends: 365578 [2020-07-21 12:31:20,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 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 12:31:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365578 states. [2020-07-21 12:31:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365578 to 365576. [2020-07-21 12:31:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365576 states. [2020-07-21 12:31:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365576 states to 365576 states and 583270 transitions. [2020-07-21 12:31:47,850 INFO L78 Accepts]: Start accepts. Automaton has 365576 states and 583270 transitions. Word has length 507 [2020-07-21 12:31:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:47,851 INFO L479 AbstractCegarLoop]: Abstraction has 365576 states and 583270 transitions. [2020-07-21 12:31:47,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:31:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 365576 states and 583270 transitions. [2020-07-21 12:31:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 12:31:47,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:47,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:31:48,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:48,171 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1380680969, now seen corresponding path program 1 times [2020-07-21 12:31:48,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:48,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151737574] [2020-07-21 12:31:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 3082 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:31:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:48,741 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 12:31:48,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:48,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151737574] [2020-07-21 12:31:48,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:48,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:31:48,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010447243] [2020-07-21 12:31:48,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:31:48,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:48,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:31:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:48,743 INFO L87 Difference]: Start difference. First operand 365576 states and 583270 transitions. Second operand 3 states. [2020-07-21 12:32:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:41,468 INFO L93 Difference]: Finished difference Result 1095192 states and 1747020 transitions. [2020-07-21 12:32:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:41,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-21 12:32:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:42,987 INFO L225 Difference]: With dead ends: 1095192 [2020-07-21 12:32:42,987 INFO L226 Difference]: Without dead ends: 729647 [2020-07-21 12:32:43,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 12:32:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729647 states. [2020-07-21 12:33:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729647 to 365602. [2020-07-21 12:33:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365602 states. [2020-07-21 12:33:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365602 states to 365602 states and 583308 transitions. [2020-07-21 12:33:19,194 INFO L78 Accepts]: Start accepts. Automaton has 365602 states and 583308 transitions. Word has length 508 [2020-07-21 12:33:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:33:19,194 INFO L479 AbstractCegarLoop]: Abstraction has 365602 states and 583308 transitions. [2020-07-21 12:33:19,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:33:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 365602 states and 583308 transitions. [2020-07-21 12:33:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 12:33:19,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:33:19,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:33:19,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:33:19,521 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:33:19,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:33:19,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1352625557, now seen corresponding path program 1 times [2020-07-21 12:33:19,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:33:19,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952449784] [2020-07-21 12:33:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:33:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:33:20,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:33:20,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:33:21,455 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 12:33:21,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:33:21,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952449784] [2020-07-21 12:33:21,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:33:21,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:33:21,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441155063] [2020-07-21 12:33:21,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:33:21,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:33:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:33:21,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:33:21,458 INFO L87 Difference]: Start difference. First operand 365602 states and 583308 transitions. Second operand 3 states. [2020-07-21 12:34:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:34:20,284 INFO L93 Difference]: Finished difference Result 1084970 states and 1729971 transitions. [2020-07-21 12:34:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:34:20,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-21 12:34:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:34:21,288 INFO L225 Difference]: With dead ends: 1084970 [2020-07-21 12:34:21,288 INFO L226 Difference]: Without dead ends: 720996 [2020-07-21 12:34:21,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 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 12:34:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720996 states. [2020-07-21 12:35:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720996 to 720994. [2020-07-21 12:35:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720994 states. [2020-07-21 12:35:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720994 states to 720994 states and 1145636 transitions. [2020-07-21 12:35:32,317 INFO L78 Accepts]: Start accepts. Automaton has 720994 states and 1145636 transitions. Word has length 509 [2020-07-21 12:35:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:35:32,318 INFO L479 AbstractCegarLoop]: Abstraction has 720994 states and 1145636 transitions. [2020-07-21 12:35:32,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:35:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 720994 states and 1145636 transitions. [2020-07-21 12:35:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 12:35:32,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:35:32,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:35:32,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:35:32,780 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:35:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:35:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1045697850, now seen corresponding path program 1 times [2020-07-21 12:35:32,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:35:32,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874070622] [2020-07-21 12:35:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:35:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:35:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:35:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:35:34,391 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 12:35:34,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:35:34,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874070622] [2020-07-21 12:35:34,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:35:34,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:35:34,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648520183] [2020-07-21 12:35:34,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:35:34,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:35:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:35:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:35:34,393 INFO L87 Difference]: Start difference. First operand 720994 states and 1145636 transitions. Second operand 3 states. [2020-07-21 12:37:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:37:34,285 INFO L93 Difference]: Finished difference Result 2162844 states and 3436677 transitions. [2020-07-21 12:37:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:37:34,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-21 12:37:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:37:36,446 INFO L225 Difference]: With dead ends: 2162844 [2020-07-21 12:37:36,446 INFO L226 Difference]: Without dead ends: 1441902 [2020-07-21 12:37:37,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 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 12:37:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441902 states. [2020-07-21 12:39:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441902 to 721056. [2020-07-21 12:39:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721056 states. [2020-07-21 12:39:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721056 states to 721056 states and 1145729 transitions. [2020-07-21 12:39:12,533 INFO L78 Accepts]: Start accepts. Automaton has 721056 states and 1145729 transitions. Word has length 509 [2020-07-21 12:39:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:39:12,533 INFO L479 AbstractCegarLoop]: Abstraction has 721056 states and 1145729 transitions. [2020-07-21 12:39:12,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:39:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 721056 states and 1145729 transitions. [2020-07-21 12:39:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 12:39:12,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:39:12,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:12,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:39:12,983 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:39:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:39:12,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1819237864, now seen corresponding path program 1 times [2020-07-21 12:39:12,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:39:12,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456267502] [2020-07-21 12:39:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:39:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:39:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:39:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:39:13,651 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 12:39:13,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:39:13,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456267502] [2020-07-21 12:39:13,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:39:13,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:39:13,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947012620] [2020-07-21 12:39:13,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:39:13,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:39:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:39:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:39:13,655 INFO L87 Difference]: Start difference. First operand 721056 states and 1145729 transitions. Second operand 3 states.