/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:47:51,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:47:51,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:47:51,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:47:51,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:47:51,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:47:51,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:47:51,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:47:51,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:47:51,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:47:51,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:47:51,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:47:51,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:47:51,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:47:51,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:47:51,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:47:51,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:47:51,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:47:51,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:47:51,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:47:51,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:47:51,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:47:51,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:47:51,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:47:51,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 23:47:51,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 23:47:51,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 23:47:51,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 23:47:51,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 23:47:51,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 23:47:51,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:47:51,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:47:51,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:47:51,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:47:51,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:47:51,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:47:51,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:47:51,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:47:51,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:47:51,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:47:51,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:47:51,209 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 23:47:51,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:47:51,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:47:51,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:47:51,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:47:51,225 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:47:51,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:47:51,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:47:51,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:47:51,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:47:51,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:47:51,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:47:51,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:47:51,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:47:51,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:47:51,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:47:51,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:47:51,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:47:51,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:47:51,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:47:51,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:47:51,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:47:51,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:47:51,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:47:51,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:47:51,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:47:51,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:47:51,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:47:51,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:47:51,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:47:51,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:47:51,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:47:51,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:47:51,509 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:47:51,511 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:47:51,511 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:47:51,512 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 23:47:51,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8822d0305/6054ac8a6cc54dd19221a59f678d3157/FLAG7a42d81ea [2020-07-21 23:47:52,314 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:47:52,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 23:47:52,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8822d0305/6054ac8a6cc54dd19221a59f678d3157/FLAG7a42d81ea [2020-07-21 23:47:52,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8822d0305/6054ac8a6cc54dd19221a59f678d3157 [2020-07-21 23:47:52,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:47:52,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:47:52,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:47:52,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:47:52,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:47:52,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:47:52" (1/1) ... [2020-07-21 23:47:52,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234a323e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:52, skipping insertion in model container [2020-07-21 23:47:52,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:47:52" (1/1) ... [2020-07-21 23:47:52,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:47:52,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:47:54,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:47:54,058 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:47:55,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:47:55,357 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:47:55,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55 WrapperNode [2020-07-21 23:47:55,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:47:55,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:47:55,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:47:55,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:47:55,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (1/1) ... [2020-07-21 23:47:55,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:47:55,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:47:55,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:47:55,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:47:55,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (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 23:47:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:47:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:47:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:47:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:47:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:47:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:47:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:47:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:47:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:47:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:47:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:47:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:47:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:47:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:47:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:47:55,700 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:47:55,700 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 23:47:55,701 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:47:55,701 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:47:55,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:47:55,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:47:55,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:47:59,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:47:59,874 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:47:59,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:47:59 BoogieIcfgContainer [2020-07-21 23:47:59,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:47:59,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:47:59,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:47:59,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:47:59,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:47:52" (1/3) ... [2020-07-21 23:47:59,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516625d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:47:59, skipping insertion in model container [2020-07-21 23:47:59,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:55" (2/3) ... [2020-07-21 23:47:59,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516625d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:47:59, skipping insertion in model container [2020-07-21 23:47:59,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:47:59" (3/3) ... [2020-07-21 23:47:59,906 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 23:47:59,917 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:47:59,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 23:47:59,943 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 23:47:59,971 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:47:59,971 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:47:59,971 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:47:59,971 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:47:59,972 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:47:59,972 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:47:59,972 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:47:59,972 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:48:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-21 23:48:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 23:48:00,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:00,055 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] [2020-07-21 23:48:00,055 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-21 23:48:00,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:00,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257004465] [2020-07-21 23:48:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:00,812 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:00,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:01,337 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 23:48:01,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:01,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257004465] [2020-07-21 23:48:01,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:01,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:01,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934439920] [2020-07-21 23:48:01,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:01,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:01,364 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 4 states. [2020-07-21 23:48:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:01,861 INFO L93 Difference]: Finished difference Result 4060 states and 7352 transitions. [2020-07-21 23:48:01,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:48:01,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2020-07-21 23:48:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:01,913 INFO L225 Difference]: With dead ends: 4060 [2020-07-21 23:48:01,913 INFO L226 Difference]: Without dead ends: 2696 [2020-07-21 23:48:01,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 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 23:48:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2020-07-21 23:48:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2656. [2020-07-21 23:48:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2656 states. [2020-07-21 23:48:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 4363 transitions. [2020-07-21 23:48:02,131 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 4363 transitions. Word has length 464 [2020-07-21 23:48:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:02,133 INFO L479 AbstractCegarLoop]: Abstraction has 2656 states and 4363 transitions. [2020-07-21 23:48:02,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 4363 transitions. [2020-07-21 23:48:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-21 23:48:02,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:02,147 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] [2020-07-21 23:48:02,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:02,361 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1436067214, now seen corresponding path program 1 times [2020-07-21 23:48:02,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:02,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552069450] [2020-07-21 23:48:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:02,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:03,286 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 23:48:03,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:03,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552069450] [2020-07-21 23:48:03,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:03,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:03,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534538967] [2020-07-21 23:48:03,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:03,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:03,290 INFO L87 Difference]: Start difference. First operand 2656 states and 4363 transitions. Second operand 3 states. [2020-07-21 23:48:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:03,680 INFO L93 Difference]: Finished difference Result 7666 states and 12551 transitions. [2020-07-21 23:48:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:03,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2020-07-21 23:48:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:03,721 INFO L225 Difference]: With dead ends: 7666 [2020-07-21 23:48:03,722 INFO L226 Difference]: Without dead ends: 5239 [2020-07-21 23:48:03,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 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 23:48:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2020-07-21 23:48:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 5201. [2020-07-21 23:48:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5201 states. [2020-07-21 23:48:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 8518 transitions. [2020-07-21 23:48:04,036 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 8518 transitions. Word has length 466 [2020-07-21 23:48:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:04,043 INFO L479 AbstractCegarLoop]: Abstraction has 5201 states and 8518 transitions. [2020-07-21 23:48:04,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 8518 transitions. [2020-07-21 23:48:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 23:48:04,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:04,084 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] [2020-07-21 23:48:04,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:04,299 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:04,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1621467042, now seen corresponding path program 1 times [2020-07-21 23:48:04,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:04,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472374826] [2020-07-21 23:48:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:04,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:04,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:05,057 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 23:48:05,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:05,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472374826] [2020-07-21 23:48:05,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:05,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:05,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501168507] [2020-07-21 23:48:05,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:05,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:05,062 INFO L87 Difference]: Start difference. First operand 5201 states and 8518 transitions. Second operand 3 states. [2020-07-21 23:48:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:05,392 INFO L93 Difference]: Finished difference Result 15347 states and 25091 transitions. [2020-07-21 23:48:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:05,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-21 23:48:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:05,441 INFO L225 Difference]: With dead ends: 15347 [2020-07-21 23:48:05,441 INFO L226 Difference]: Without dead ends: 10177 [2020-07-21 23:48:05,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 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 23:48:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2020-07-21 23:48:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 5227. [2020-07-21 23:48:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5227 states. [2020-07-21 23:48:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 8556 transitions. [2020-07-21 23:48:05,745 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 8556 transitions. Word has length 467 [2020-07-21 23:48:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:05,746 INFO L479 AbstractCegarLoop]: Abstraction has 5227 states and 8556 transitions. [2020-07-21 23:48:05,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 8556 transitions. [2020-07-21 23:48:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 23:48:05,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:05,763 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] [2020-07-21 23:48:05,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:05,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash -874596179, now seen corresponding path program 1 times [2020-07-21 23:48:05,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:05,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267605993] [2020-07-21 23:48:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:06,587 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:06,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:06,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:06,727 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 23:48:06,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:06,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267605993] [2020-07-21 23:48:06,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:06,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:06,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096116261] [2020-07-21 23:48:06,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:06,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:06,730 INFO L87 Difference]: Start difference. First operand 5227 states and 8556 transitions. Second operand 4 states. [2020-07-21 23:48:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:07,366 INFO L93 Difference]: Finished difference Result 12486 states and 20625 transitions. [2020-07-21 23:48:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:07,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-21 23:48:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:07,424 INFO L225 Difference]: With dead ends: 12486 [2020-07-21 23:48:07,424 INFO L226 Difference]: Without dead ends: 6337 [2020-07-21 23:48:07,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 465 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 23:48:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2020-07-21 23:48:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 6299. [2020-07-21 23:48:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6299 states. [2020-07-21 23:48:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 10372 transitions. [2020-07-21 23:48:07,774 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 10372 transitions. Word has length 468 [2020-07-21 23:48:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:07,774 INFO L479 AbstractCegarLoop]: Abstraction has 6299 states and 10372 transitions. [2020-07-21 23:48:07,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 10372 transitions. [2020-07-21 23:48:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 23:48:07,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:07,798 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] [2020-07-21 23:48:08,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:08,014 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 385088319, now seen corresponding path program 1 times [2020-07-21 23:48:08,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:08,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077011233] [2020-07-21 23:48:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:08,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:08,963 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 23:48:08,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:08,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077011233] [2020-07-21 23:48:08,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:08,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:08,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023238475] [2020-07-21 23:48:08,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:08,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:08,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:08,966 INFO L87 Difference]: Start difference. First operand 6299 states and 10372 transitions. Second operand 3 states. [2020-07-21 23:48:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:09,450 INFO L93 Difference]: Finished difference Result 18414 states and 30283 transitions. [2020-07-21 23:48:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:09,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 23:48:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:09,482 INFO L225 Difference]: With dead ends: 18414 [2020-07-21 23:48:09,486 INFO L226 Difference]: Without dead ends: 12491 [2020-07-21 23:48:09,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 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 23:48:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12491 states. [2020-07-21 23:48:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12491 to 12428. [2020-07-21 23:48:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12428 states. [2020-07-21 23:48:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12428 states to 12428 states and 20394 transitions. [2020-07-21 23:48:09,931 INFO L78 Accepts]: Start accepts. Automaton has 12428 states and 20394 transitions. Word has length 470 [2020-07-21 23:48:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:09,932 INFO L479 AbstractCegarLoop]: Abstraction has 12428 states and 20394 transitions. [2020-07-21 23:48:09,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12428 states and 20394 transitions. [2020-07-21 23:48:09,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 23:48:09,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:09,960 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] [2020-07-21 23:48:10,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:10,173 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1045568230, now seen corresponding path program 1 times [2020-07-21 23:48:10,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:10,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703842566] [2020-07-21 23:48:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:10,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:10,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:10,867 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 23:48:10,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:10,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703842566] [2020-07-21 23:48:10,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:10,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:10,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198020732] [2020-07-21 23:48:10,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:10,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:10,870 INFO L87 Difference]: Start difference. First operand 12428 states and 20394 transitions. Second operand 3 states. [2020-07-21 23:48:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:11,360 INFO L93 Difference]: Finished difference Result 37003 states and 60707 transitions. [2020-07-21 23:48:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:11,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 23:48:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:11,426 INFO L225 Difference]: With dead ends: 37003 [2020-07-21 23:48:11,427 INFO L226 Difference]: Without dead ends: 24712 [2020-07-21 23:48:11,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 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 23:48:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24712 states. [2020-07-21 23:48:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24712 to 12521. [2020-07-21 23:48:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12521 states. [2020-07-21 23:48:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12521 states to 12521 states and 20535 transitions. [2020-07-21 23:48:12,815 INFO L78 Accepts]: Start accepts. Automaton has 12521 states and 20535 transitions. Word has length 470 [2020-07-21 23:48:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:12,816 INFO L479 AbstractCegarLoop]: Abstraction has 12521 states and 20535 transitions. [2020-07-21 23:48:12,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12521 states and 20535 transitions. [2020-07-21 23:48:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 23:48:12,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:12,845 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] [2020-07-21 23:48:13,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:13,059 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash 785717655, now seen corresponding path program 1 times [2020-07-21 23:48:13,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:13,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090427844] [2020-07-21 23:48:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:13,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:13,581 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 23:48:13,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:13,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090427844] [2020-07-21 23:48:13,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:13,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:13,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428953625] [2020-07-21 23:48:13,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:13,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:13,584 INFO L87 Difference]: Start difference. First operand 12521 states and 20535 transitions. Second operand 3 states. [2020-07-21 23:48:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:14,103 INFO L93 Difference]: Finished difference Result 36619 states and 60011 transitions. [2020-07-21 23:48:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:14,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 23:48:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:14,140 INFO L225 Difference]: With dead ends: 36619 [2020-07-21 23:48:14,140 INFO L226 Difference]: Without dead ends: 24584 [2020-07-21 23:48:14,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 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 23:48:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24584 states. [2020-07-21 23:48:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24584 to 12673. [2020-07-21 23:48:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12673 states. [2020-07-21 23:48:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12673 states to 12673 states and 20759 transitions. [2020-07-21 23:48:14,674 INFO L78 Accepts]: Start accepts. Automaton has 12673 states and 20759 transitions. Word has length 471 [2020-07-21 23:48:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:14,675 INFO L479 AbstractCegarLoop]: Abstraction has 12673 states and 20759 transitions. [2020-07-21 23:48:14,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 12673 states and 20759 transitions. [2020-07-21 23:48:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 23:48:14,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:14,694 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] [2020-07-21 23:48:14,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:14,907 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2005156598, now seen corresponding path program 1 times [2020-07-21 23:48:14,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:14,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200109590] [2020-07-21 23:48:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:15,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:15,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:15,693 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 23:48:15,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:15,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200109590] [2020-07-21 23:48:15,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:15,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:15,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884630223] [2020-07-21 23:48:15,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:15,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:15,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:15,696 INFO L87 Difference]: Start difference. First operand 12673 states and 20759 transitions. Second operand 3 states. [2020-07-21 23:48:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:16,593 INFO L93 Difference]: Finished difference Result 37630 states and 61619 transitions. [2020-07-21 23:48:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:16,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 23:48:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:16,622 INFO L225 Difference]: With dead ends: 37630 [2020-07-21 23:48:16,622 INFO L226 Difference]: Without dead ends: 25148 [2020-07-21 23:48:16,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 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 23:48:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25148 states. [2020-07-21 23:48:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25148 to 12805. [2020-07-21 23:48:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12805 states. [2020-07-21 23:48:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12805 states to 12805 states and 20930 transitions. [2020-07-21 23:48:17,345 INFO L78 Accepts]: Start accepts. Automaton has 12805 states and 20930 transitions. Word has length 471 [2020-07-21 23:48:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:17,345 INFO L479 AbstractCegarLoop]: Abstraction has 12805 states and 20930 transitions. [2020-07-21 23:48:17,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 12805 states and 20930 transitions. [2020-07-21 23:48:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-21 23:48:17,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:17,365 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] [2020-07-21 23:48:17,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:17,566 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -547855236, now seen corresponding path program 1 times [2020-07-21 23:48:17,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:17,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870040346] [2020-07-21 23:48:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:18,082 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:18,302 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 23:48:18,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:18,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870040346] [2020-07-21 23:48:18,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:18,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:18,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508383394] [2020-07-21 23:48:18,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:18,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:18,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:18,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:18,305 INFO L87 Difference]: Start difference. First operand 12805 states and 20930 transitions. Second operand 3 states. [2020-07-21 23:48:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:19,156 INFO L93 Difference]: Finished difference Result 36076 states and 58841 transitions. [2020-07-21 23:48:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:19,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-21 23:48:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:19,182 INFO L225 Difference]: With dead ends: 36076 [2020-07-21 23:48:19,182 INFO L226 Difference]: Without dead ends: 24815 [2020-07-21 23:48:19,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 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 23:48:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24815 states. [2020-07-21 23:48:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24815 to 24779. [2020-07-21 23:48:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24779 states. [2020-07-21 23:48:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24779 states to 24779 states and 40346 transitions. [2020-07-21 23:48:19,900 INFO L78 Accepts]: Start accepts. Automaton has 24779 states and 40346 transitions. Word has length 472 [2020-07-21 23:48:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:19,900 INFO L479 AbstractCegarLoop]: Abstraction has 24779 states and 40346 transitions. [2020-07-21 23:48:19,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 24779 states and 40346 transitions. [2020-07-21 23:48:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 23:48:19,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:19,921 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] [2020-07-21 23:48:20,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:20,128 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash 185738140, now seen corresponding path program 1 times [2020-07-21 23:48:20,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:20,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800283702] [2020-07-21 23:48:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:20,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:20,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:21,345 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 23:48:21,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:21,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800283702] [2020-07-21 23:48:21,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:21,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:21,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511334128] [2020-07-21 23:48:21,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:21,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:21,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:21,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:21,347 INFO L87 Difference]: Start difference. First operand 24779 states and 40346 transitions. Second operand 3 states. [2020-07-21 23:48:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:22,526 INFO L93 Difference]: Finished difference Result 72065 states and 117382 transitions. [2020-07-21 23:48:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:22,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 23:48:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:22,585 INFO L225 Difference]: With dead ends: 72065 [2020-07-21 23:48:22,585 INFO L226 Difference]: Without dead ends: 48460 [2020-07-21 23:48:22,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 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 23:48:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48460 states. [2020-07-21 23:48:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48460 to 25147. [2020-07-21 23:48:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25147 states. [2020-07-21 23:48:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25147 states to 25147 states and 40886 transitions. [2020-07-21 23:48:23,650 INFO L78 Accepts]: Start accepts. Automaton has 25147 states and 40886 transitions. Word has length 474 [2020-07-21 23:48:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:23,651 INFO L479 AbstractCegarLoop]: Abstraction has 25147 states and 40886 transitions. [2020-07-21 23:48:23,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 25147 states and 40886 transitions. [2020-07-21 23:48:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 23:48:23,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:23,676 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] [2020-07-21 23:48:23,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:23,891 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash -319233921, now seen corresponding path program 1 times [2020-07-21 23:48:23,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:23,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556677796] [2020-07-21 23:48:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:24,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:24,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:24,509 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 23:48:24,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:24,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556677796] [2020-07-21 23:48:24,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:24,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:24,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270845309] [2020-07-21 23:48:24,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:24,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:24,511 INFO L87 Difference]: Start difference. First operand 25147 states and 40886 transitions. Second operand 4 states. [2020-07-21 23:48:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:25,854 INFO L93 Difference]: Finished difference Result 60526 states and 99033 transitions. [2020-07-21 23:48:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:25,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-21 23:48:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:25,888 INFO L225 Difference]: With dead ends: 60526 [2020-07-21 23:48:25,889 INFO L226 Difference]: Without dead ends: 31829 [2020-07-21 23:48:25,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 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 23:48:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31829 states. [2020-07-21 23:48:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31829 to 31793. [2020-07-21 23:48:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31793 states. [2020-07-21 23:48:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31793 states to 31793 states and 51879 transitions. [2020-07-21 23:48:27,141 INFO L78 Accepts]: Start accepts. Automaton has 31793 states and 51879 transitions. Word has length 474 [2020-07-21 23:48:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:27,142 INFO L479 AbstractCegarLoop]: Abstraction has 31793 states and 51879 transitions. [2020-07-21 23:48:27,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 31793 states and 51879 transitions. [2020-07-21 23:48:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 23:48:27,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:27,178 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] [2020-07-21 23:48:27,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:27,394 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:27,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1155897022, now seen corresponding path program 1 times [2020-07-21 23:48:27,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:27,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151848219] [2020-07-21 23:48:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:27,851 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:27,990 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 23:48:27,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:27,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151848219] [2020-07-21 23:48:27,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:27,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:27,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957071003] [2020-07-21 23:48:27,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:27,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:27,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:27,995 INFO L87 Difference]: Start difference. First operand 31793 states and 51879 transitions. Second operand 3 states. [2020-07-21 23:48:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:30,571 INFO L93 Difference]: Finished difference Result 88817 states and 144660 transitions. [2020-07-21 23:48:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:30,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 23:48:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:30,628 INFO L225 Difference]: With dead ends: 88817 [2020-07-21 23:48:30,629 INFO L226 Difference]: Without dead ends: 57288 [2020-07-21 23:48:30,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 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 23:48:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57288 states. [2020-07-21 23:48:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57288 to 31288. [2020-07-21 23:48:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31288 states. [2020-07-21 23:48:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31288 states to 31288 states and 51056 transitions. [2020-07-21 23:48:31,827 INFO L78 Accepts]: Start accepts. Automaton has 31288 states and 51056 transitions. Word has length 474 [2020-07-21 23:48:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:31,827 INFO L479 AbstractCegarLoop]: Abstraction has 31288 states and 51056 transitions. [2020-07-21 23:48:31,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 31288 states and 51056 transitions. [2020-07-21 23:48:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 23:48:32,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:32,057 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] [2020-07-21 23:48:32,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:32,258 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1370288306, now seen corresponding path program 1 times [2020-07-21 23:48:32,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:32,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213367227] [2020-07-21 23:48:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:32,802 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:33,094 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 23:48:33,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:33,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213367227] [2020-07-21 23:48:33,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:33,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:48:33,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471950866] [2020-07-21 23:48:33,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:48:33,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:33,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:48:33,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:48:33,097 INFO L87 Difference]: Start difference. First operand 31288 states and 51056 transitions. Second operand 5 states. [2020-07-21 23:48:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:35,148 INFO L93 Difference]: Finished difference Result 43873 states and 70342 transitions. [2020-07-21 23:48:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:48:35,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-21 23:48:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:35,191 INFO L225 Difference]: With dead ends: 43873 [2020-07-21 23:48:35,191 INFO L226 Difference]: Without dead ends: 31288 [2020-07-21 23:48:35,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:48:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31288 states. [2020-07-21 23:48:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31288 to 31288. [2020-07-21 23:48:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31288 states. [2020-07-21 23:48:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31288 states to 31288 states and 50762 transitions. [2020-07-21 23:48:37,100 INFO L78 Accepts]: Start accepts. Automaton has 31288 states and 50762 transitions. Word has length 476 [2020-07-21 23:48:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:37,100 INFO L479 AbstractCegarLoop]: Abstraction has 31288 states and 50762 transitions. [2020-07-21 23:48:37,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:48:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 31288 states and 50762 transitions. [2020-07-21 23:48:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 23:48:37,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:37,127 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] [2020-07-21 23:48:37,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:37,328 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1426801997, now seen corresponding path program 1 times [2020-07-21 23:48:37,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:37,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112902177] [2020-07-21 23:48:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:37,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:37,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 2066 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:38,072 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 23:48:38,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:38,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112902177] [2020-07-21 23:48:38,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:38,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:38,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708920844] [2020-07-21 23:48:38,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:38,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:38,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:38,074 INFO L87 Difference]: Start difference. First operand 31288 states and 50762 transitions. Second operand 4 states. [2020-07-21 23:48:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:40,646 INFO L93 Difference]: Finished difference Result 89580 states and 145490 transitions. [2020-07-21 23:48:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:40,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 23:48:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:40,706 INFO L225 Difference]: With dead ends: 89580 [2020-07-21 23:48:40,706 INFO L226 Difference]: Without dead ends: 60363 [2020-07-21 23:48:40,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 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 23:48:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60363 states. [2020-07-21 23:48:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60363 to 60170. [2020-07-21 23:48:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60170 states. [2020-07-21 23:48:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60170 states to 60170 states and 97264 transitions. [2020-07-21 23:48:44,345 INFO L78 Accepts]: Start accepts. Automaton has 60170 states and 97264 transitions. Word has length 476 [2020-07-21 23:48:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:44,346 INFO L479 AbstractCegarLoop]: Abstraction has 60170 states and 97264 transitions. [2020-07-21 23:48:44,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60170 states and 97264 transitions. [2020-07-21 23:48:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 23:48:44,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:44,396 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] [2020-07-21 23:48:44,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:44,603 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1519219969, now seen corresponding path program 1 times [2020-07-21 23:48:44,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:44,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059891188] [2020-07-21 23:48:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:45,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:45,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:45,338 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 23:48:45,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:45,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059891188] [2020-07-21 23:48:45,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:45,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:45,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269431148] [2020-07-21 23:48:45,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:45,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:45,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:45,340 INFO L87 Difference]: Start difference. First operand 60170 states and 97264 transitions. Second operand 3 states. [2020-07-21 23:48:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:50,233 INFO L93 Difference]: Finished difference Result 174364 states and 281582 transitions. [2020-07-21 23:48:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:50,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 23:48:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:50,362 INFO L225 Difference]: With dead ends: 174364 [2020-07-21 23:48:50,362 INFO L226 Difference]: Without dead ends: 118531 [2020-07-21 23:48:50,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 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 23:48:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118531 states. [2020-07-21 23:48:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118531 to 118338. [2020-07-21 23:48:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118338 states. [2020-07-21 23:48:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118338 states to 118338 states and 190574 transitions. [2020-07-21 23:48:57,377 INFO L78 Accepts]: Start accepts. Automaton has 118338 states and 190574 transitions. Word has length 478 [2020-07-21 23:48:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:57,377 INFO L479 AbstractCegarLoop]: Abstraction has 118338 states and 190574 transitions. [2020-07-21 23:48:57,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 118338 states and 190574 transitions. [2020-07-21 23:48:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 23:48:57,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:57,480 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] [2020-07-21 23:48:57,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:57,681 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:57,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1940259418, now seen corresponding path program 1 times [2020-07-21 23:48:57,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:57,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149249697] [2020-07-21 23:48:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:58,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:58,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:58,296 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 23:48:58,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:58,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149249697] [2020-07-21 23:48:58,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:58,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:58,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235388855] [2020-07-21 23:48:58,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:58,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:58,298 INFO L87 Difference]: Start difference. First operand 118338 states and 190574 transitions. Second operand 4 states. [2020-07-21 23:49:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:07,993 INFO L93 Difference]: Finished difference Result 292354 states and 473686 transitions. [2020-07-21 23:49:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:49:07,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-21 23:49:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:08,177 INFO L225 Difference]: With dead ends: 292354 [2020-07-21 23:49:08,178 INFO L226 Difference]: Without dead ends: 142745 [2020-07-21 23:49:08,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 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 23:49:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142745 states. [2020-07-21 23:49:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142745 to 142552. [2020-07-21 23:49:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142552 states. [2020-07-21 23:49:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142552 states to 142552 states and 229604 transitions. [2020-07-21 23:49:19,047 INFO L78 Accepts]: Start accepts. Automaton has 142552 states and 229604 transitions. Word has length 480 [2020-07-21 23:49:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:19,047 INFO L479 AbstractCegarLoop]: Abstraction has 142552 states and 229604 transitions. [2020-07-21 23:49:19,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:49:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 142552 states and 229604 transitions. [2020-07-21 23:49:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 23:49:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:19,175 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] [2020-07-21 23:49:19,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:19,376 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash -792912361, now seen corresponding path program 1 times [2020-07-21 23:49:19,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:19,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502248477] [2020-07-21 23:49:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:49:19,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:20,026 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 23:49:20,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:20,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502248477] [2020-07-21 23:49:20,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:20,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:20,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051501853] [2020-07-21 23:49:20,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:20,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:20,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:20,040 INFO L87 Difference]: Start difference. First operand 142552 states and 229604 transitions. Second operand 3 states. [2020-07-21 23:49:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:35,576 INFO L93 Difference]: Finished difference Result 422006 states and 679426 transitions. [2020-07-21 23:49:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:35,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 23:49:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:35,887 INFO L225 Difference]: With dead ends: 422006 [2020-07-21 23:49:35,888 INFO L226 Difference]: Without dead ends: 282435 [2020-07-21 23:49:35,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 23:49:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282435 states. [2020-07-21 23:49:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282435 to 143934. [2020-07-21 23:49:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143934 states. [2020-07-21 23:49:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143934 states to 143934 states and 231338 transitions. [2020-07-21 23:49:43,987 INFO L78 Accepts]: Start accepts. Automaton has 143934 states and 231338 transitions. Word has length 480 [2020-07-21 23:49:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:43,987 INFO L479 AbstractCegarLoop]: Abstraction has 143934 states and 231338 transitions. [2020-07-21 23:49:43,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 143934 states and 231338 transitions. [2020-07-21 23:49:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 23:49:44,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:44,139 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] [2020-07-21 23:49:44,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:44,340 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash -868934738, now seen corresponding path program 1 times [2020-07-21 23:49:44,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:44,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793525363] [2020-07-21 23:49:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:49:44,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:44,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:45,468 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 23:49:45,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793525363] [2020-07-21 23:49:45,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:45,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769396402] [2020-07-21 23:49:45,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:45,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:45,470 INFO L87 Difference]: Start difference. First operand 143934 states and 231338 transitions. Second operand 3 states. [2020-07-21 23:50:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:02,030 INFO L93 Difference]: Finished difference Result 405720 states and 651532 transitions. [2020-07-21 23:50:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:02,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 23:50:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:02,348 INFO L225 Difference]: With dead ends: 405720 [2020-07-21 23:50:02,348 INFO L226 Difference]: Without dead ends: 273003 [2020-07-21 23:50:02,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 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 23:50:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273003 states. [2020-07-21 23:50:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273003 to 145970. [2020-07-21 23:50:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145970 states. [2020-07-21 23:50:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145970 states to 145970 states and 234320 transitions. [2020-07-21 23:50:11,195 INFO L78 Accepts]: Start accepts. Automaton has 145970 states and 234320 transitions. Word has length 481 [2020-07-21 23:50:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:11,196 INFO L479 AbstractCegarLoop]: Abstraction has 145970 states and 234320 transitions. [2020-07-21 23:50:11,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 145970 states and 234320 transitions. [2020-07-21 23:50:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 23:50:11,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:11,930 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] [2020-07-21 23:50:12,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:12,138 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -799474080, now seen corresponding path program 1 times [2020-07-21 23:50:12,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:12,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602145795] [2020-07-21 23:50:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:50:12,616 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:12,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:12,739 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 23:50:12,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:12,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602145795] [2020-07-21 23:50:12,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:12,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:12,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675196562] [2020-07-21 23:50:12,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:12,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:12,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:12,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:12,741 INFO L87 Difference]: Start difference. First operand 145970 states and 234320 transitions. Second operand 3 states. [2020-07-21 23:50:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:28,601 INFO L93 Difference]: Finished difference Result 413358 states and 663242 transitions. [2020-07-21 23:50:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:28,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 23:50:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:28,921 INFO L225 Difference]: With dead ends: 413358 [2020-07-21 23:50:28,921 INFO L226 Difference]: Without dead ends: 278833 [2020-07-21 23:50:29,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 23:50:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278833 states. [2020-07-21 23:50:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278833 to 148480. [2020-07-21 23:50:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148480 states. [2020-07-21 23:50:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148480 states to 148480 states and 237702 transitions. [2020-07-21 23:50:38,380 INFO L78 Accepts]: Start accepts. Automaton has 148480 states and 237702 transitions. Word has length 482 [2020-07-21 23:50:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:38,380 INFO L479 AbstractCegarLoop]: Abstraction has 148480 states and 237702 transitions. [2020-07-21 23:50:38,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 148480 states and 237702 transitions. [2020-07-21 23:50:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 23:50:39,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:39,082 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] [2020-07-21 23:50:39,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:39,289 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash 678760434, now seen corresponding path program 1 times [2020-07-21 23:50:39,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:39,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055714566] [2020-07-21 23:50:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:50:39,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:39,862 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 23:50:39,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:39,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055714566] [2020-07-21 23:50:39,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:39,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:39,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947163344] [2020-07-21 23:50:39,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:39,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:39,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:39,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:39,864 INFO L87 Difference]: Start difference. First operand 148480 states and 237702 transitions. Second operand 3 states. [2020-07-21 23:50:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:56,732 INFO L93 Difference]: Finished difference Result 434252 states and 695588 transitions. [2020-07-21 23:50:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:56,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 23:50:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:57,060 INFO L225 Difference]: With dead ends: 434252 [2020-07-21 23:50:57,060 INFO L226 Difference]: Without dead ends: 289505 [2020-07-21 23:50:57,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 23:50:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289505 states. [2020-07-21 23:51:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289505 to 148510. [2020-07-21 23:51:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148510 states. [2020-07-21 23:51:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148510 states to 148510 states and 237422 transitions. [2020-07-21 23:51:11,337 INFO L78 Accepts]: Start accepts. Automaton has 148510 states and 237422 transitions. Word has length 482 [2020-07-21 23:51:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:11,337 INFO L479 AbstractCegarLoop]: Abstraction has 148510 states and 237422 transitions. [2020-07-21 23:51:11,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 148510 states and 237422 transitions. [2020-07-21 23:51:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 23:51:11,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:11,484 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (21)] Forcibly destroying the process [2020-07-21 23:51:12,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:12,112 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:12,113 INFO L82 PathProgramCache]: Analyzing trace with hash -680300873, now seen corresponding path program 1 times [2020-07-21 23:51:12,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:12,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665402340] [2020-07-21 23:51:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:12,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:12,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:12,711 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 23:51:12,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:12,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665402340] [2020-07-21 23:51:12,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:12,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474624857] [2020-07-21 23:51:12,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:12,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:12,714 INFO L87 Difference]: Start difference. First operand 148510 states and 237422 transitions. Second operand 3 states. [2020-07-21 23:51:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:32,344 INFO L93 Difference]: Finished difference Result 429418 states and 687618 transitions. [2020-07-21 23:51:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:32,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 23:51:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:32,683 INFO L225 Difference]: With dead ends: 429418 [2020-07-21 23:51:32,683 INFO L226 Difference]: Without dead ends: 288547 [2020-07-21 23:51:32,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 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 23:51:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288547 states. [2020-07-21 23:51:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288547 to 150298. [2020-07-21 23:51:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150298 states. [2020-07-21 23:51:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150298 states to 150298 states and 240098 transitions. [2020-07-21 23:51:43,312 INFO L78 Accepts]: Start accepts. Automaton has 150298 states and 240098 transitions. Word has length 483 [2020-07-21 23:51:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:43,313 INFO L479 AbstractCegarLoop]: Abstraction has 150298 states and 240098 transitions. [2020-07-21 23:51:43,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 150298 states and 240098 transitions. [2020-07-21 23:51:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 23:51:43,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:43,454 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] [2020-07-21 23:51:43,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:43,655 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1662538246, now seen corresponding path program 1 times [2020-07-21 23:51:43,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:43,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260665721] [2020-07-21 23:51:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:44,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:44,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:44,245 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 23:51:44,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:44,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260665721] [2020-07-21 23:51:44,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:44,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:44,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630931769] [2020-07-21 23:51:44,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:44,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:44,247 INFO L87 Difference]: Start difference. First operand 150298 states and 240098 transitions. Second operand 3 states. [2020-07-21 23:52:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:04,709 INFO L93 Difference]: Finished difference Result 416578 states and 666760 transitions. [2020-07-21 23:52:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:04,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 23:52:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:05,048 INFO L225 Difference]: With dead ends: 416578 [2020-07-21 23:52:05,048 INFO L226 Difference]: Without dead ends: 283867 [2020-07-21 23:52:05,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 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 23:52:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283867 states. [2020-07-21 23:52:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283867 to 153794. [2020-07-21 23:52:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153794 states. [2020-07-21 23:52:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153794 states to 153794 states and 244488 transitions. [2020-07-21 23:52:16,848 INFO L78 Accepts]: Start accepts. Automaton has 153794 states and 244488 transitions. Word has length 483 [2020-07-21 23:52:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:16,848 INFO L479 AbstractCegarLoop]: Abstraction has 153794 states and 244488 transitions. [2020-07-21 23:52:16,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 153794 states and 244488 transitions. [2020-07-21 23:52:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 23:52:16,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:16,988 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] [2020-07-21 23:52:17,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:17,189 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:17,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:17,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1463081337, now seen corresponding path program 1 times [2020-07-21 23:52:17,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:17,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510712585] [2020-07-21 23:52:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:17,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:17,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:17,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:17,833 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 23:52:17,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:17,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510712585] [2020-07-21 23:52:17,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:17,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:17,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831047413] [2020-07-21 23:52:17,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:17,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:17,836 INFO L87 Difference]: Start difference. First operand 153794 states and 244488 transitions. Second operand 4 states. [2020-07-21 23:52:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:40,273 INFO L93 Difference]: Finished difference Result 446611 states and 711070 transitions. [2020-07-21 23:52:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:40,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-21 23:52:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:40,597 INFO L225 Difference]: With dead ends: 446611 [2020-07-21 23:52:40,597 INFO L226 Difference]: Without dead ends: 300320 [2020-07-21 23:52:40,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 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 23:52:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300320 states. [2020-07-21 23:53:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300320 to 300277. [2020-07-21 23:53:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300277 states. [2020-07-21 23:53:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300277 states to 300277 states and 475813 transitions. [2020-07-21 23:53:06,284 INFO L78 Accepts]: Start accepts. Automaton has 300277 states and 475813 transitions. Word has length 483 [2020-07-21 23:53:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:06,284 INFO L479 AbstractCegarLoop]: Abstraction has 300277 states and 475813 transitions. [2020-07-21 23:53:06,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 300277 states and 475813 transitions. [2020-07-21 23:53:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:53:06,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:06,576 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] [2020-07-21 23:53:06,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:06,777 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 414890772, now seen corresponding path program 1 times [2020-07-21 23:53:06,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:06,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586157914] [2020-07-21 23:53:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:07,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:07,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:53:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:07,374 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 23:53:07,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:07,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586157914] [2020-07-21 23:53:07,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:07,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:53:07,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495306752] [2020-07-21 23:53:07,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:53:07,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:53:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:53:07,376 INFO L87 Difference]: Start difference. First operand 300277 states and 475813 transitions. Second operand 4 states. [2020-07-21 23:53:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:51,760 INFO L93 Difference]: Finished difference Result 826567 states and 1311161 transitions. [2020-07-21 23:53:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:51,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 23:53:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:52,513 INFO L225 Difference]: With dead ends: 826567 [2020-07-21 23:53:52,513 INFO L226 Difference]: Without dead ends: 581002 [2020-07-21 23:53:52,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 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 23:53:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581002 states. [2020-07-21 23:54:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581002 to 345285. [2020-07-21 23:54:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345285 states. [2020-07-21 23:54:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345285 states to 345285 states and 547087 transitions. [2020-07-21 23:54:28,295 INFO L78 Accepts]: Start accepts. Automaton has 345285 states and 547087 transitions. Word has length 486 [2020-07-21 23:54:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:28,296 INFO L479 AbstractCegarLoop]: Abstraction has 345285 states and 547087 transitions. [2020-07-21 23:54:28,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:54:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 345285 states and 547087 transitions. [2020-07-21 23:54:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:54:28,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:28,637 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] [2020-07-21 23:54:28,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:28,838 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1609483138, now seen corresponding path program 1 times [2020-07-21 23:54:28,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:28,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945631320] [2020-07-21 23:54:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:29,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:29,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:29,423 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 23:54:29,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:29,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945631320] [2020-07-21 23:54:29,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:29,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:29,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189770081] [2020-07-21 23:54:29,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:29,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:29,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:29,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:29,425 INFO L87 Difference]: Start difference. First operand 345285 states and 547087 transitions. Second operand 3 states. [2020-07-21 23:55:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:22,379 INFO L93 Difference]: Finished difference Result 1018394 states and 1614549 transitions. [2020-07-21 23:55:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:55:22,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 23:55:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:23,798 INFO L225 Difference]: With dead ends: 1018394 [2020-07-21 23:55:23,799 INFO L226 Difference]: Without dead ends: 687347 [2020-07-21 23:55:24,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 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 23:55:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687347 states. [2020-07-21 23:56:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687347 to 687323. [2020-07-21 23:56:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687323 states. [2020-07-21 23:56:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687323 states to 687323 states and 1084401 transitions. [2020-07-21 23:56:35,349 INFO L78 Accepts]: Start accepts. Automaton has 687323 states and 1084401 transitions. Word has length 486 [2020-07-21 23:56:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:35,349 INFO L479 AbstractCegarLoop]: Abstraction has 687323 states and 1084401 transitions. [2020-07-21 23:56:35,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:56:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 687323 states and 1084401 transitions. [2020-07-21 23:56:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:56:37,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:37,305 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] [2020-07-21 23:56:37,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:37,506 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash 514595675, now seen corresponding path program 1 times [2020-07-21 23:56:37,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:37,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402816613] [2020-07-21 23:56:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:37,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:56:37,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:56:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:38,105 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 23:56:38,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:38,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402816613] [2020-07-21 23:56:38,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:38,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:56:38,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878008648] [2020-07-21 23:56:38,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:56:38,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:56:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:56:38,107 INFO L87 Difference]: Start difference. First operand 687323 states and 1084401 transitions. Second operand 4 states. [2020-07-21 23:58:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:58:38,630 INFO L93 Difference]: Finished difference Result 1860055 states and 2937764 transitions. [2020-07-21 23:58:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:58:38,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 23:58:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:58:41,560 INFO L225 Difference]: With dead ends: 1860055 [2020-07-21 23:58:41,560 INFO L226 Difference]: Without dead ends: 1356678 [2020-07-21 23:58:42,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 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 23:58:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356678 states.