/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:01:08,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:01:08,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:01:08,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:01:08,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:01:08,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:01:08,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:01:08,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:01:08,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:01:08,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:01:08,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:01:08,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:01:08,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:01:08,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:01:08,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:01:08,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:01:08,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:01:08,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:01:08,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:01:08,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:01:08,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:01:08,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:01:08,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:01:08,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:01:08,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:01:08,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:01:08,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:01:08,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:01:08,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:01:09,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:01:09,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:01:09,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:01:09,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:01:09,011 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:01:09,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:01:09,012 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:01:09,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:01:09,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:01:09,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:01:09,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:01:09,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:01:09,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:01:09,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:01:09,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:01:09,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:01:09,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:01:09,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:01:09,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:01:09,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:01:09,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:01:09,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:01:09,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:01:09,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:01:09,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:01:09,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:01:09,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:09,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:01:09,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:01:09,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 15:01:09,314 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:01:09,327 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:01:09,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:01:09,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:01:09,332 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:01:09,333 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 15:01:09,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75cbb1239/324be3fff55f4033955f2592f2c24d04/FLAGc73db52ec [2020-07-20 15:01:10,155 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:01:10,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 15:01:10,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75cbb1239/324be3fff55f4033955f2592f2c24d04/FLAGc73db52ec [2020-07-20 15:01:10,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75cbb1239/324be3fff55f4033955f2592f2c24d04 [2020-07-20 15:01:10,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:01:10,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:01:10,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:01:10,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:01:10,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:01:10,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:01:10" (1/1) ... [2020-07-20 15:01:10,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531bed79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:10, skipping insertion in model container [2020-07-20 15:01:10,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:01:10" (1/1) ... [2020-07-20 15:01:10,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:01:10,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:01:11,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:01:11,947 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:01:13,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:01:13,157 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:01:13,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13 WrapperNode [2020-07-20 15:01:13,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:01:13,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:01:13,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:01:13,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:01:13,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... [2020-07-20 15:01:13,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:01:13,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:01:13,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:01:13,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:01:13,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:01:13,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:01:13,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:01:13,448 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:01:13,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:01:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:01:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:01:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:01:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:01:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:01:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:01:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:01:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:01:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:01:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:01:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:01:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:01:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 15:01:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:01:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:01:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:01:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:01:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:01:16,819 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:01:16,819 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:01:16,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:01:16 BoogieIcfgContainer [2020-07-20 15:01:16,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:01:16,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:01:16,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:01:16,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:01:16,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:01:10" (1/3) ... [2020-07-20 15:01:16,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793fd973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:01:16, skipping insertion in model container [2020-07-20 15:01:16,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:13" (2/3) ... [2020-07-20 15:01:16,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793fd973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:01:16, skipping insertion in model container [2020-07-20 15:01:16,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:01:16" (3/3) ... [2020-07-20 15:01:16,841 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 15:01:16,852 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:01:16,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 15:01:16,878 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 15:01:16,908 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:01:16,909 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:01:16,909 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:01:16,909 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:01:16,909 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:01:16,909 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:01:16,909 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:01:16,910 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:01:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-20 15:01:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 15:01:16,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:16,985 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] [2020-07-20 15:01:16,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-20 15:01:17,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:17,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971289677] [2020-07-20 15:01:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:17,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:01:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:18,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:18,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971289677] [2020-07-20 15:01:18,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:18,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:18,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680800755] [2020-07-20 15:01:18,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:18,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:18,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:18,204 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-07-20 15:01:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:18,587 INFO L93 Difference]: Finished difference Result 3913 states and 7058 transitions. [2020-07-20 15:01:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:18,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-20 15:01:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:18,622 INFO L225 Difference]: With dead ends: 3913 [2020-07-20 15:01:18,622 INFO L226 Difference]: Without dead ends: 2600 [2020-07-20 15:01:18,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2020-07-20 15:01:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2598. [2020-07-20 15:01:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2598 states. [2020-07-20 15:01:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 4269 transitions. [2020-07-20 15:01:18,844 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 4269 transitions. Word has length 467 [2020-07-20 15:01:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:18,847 INFO L479 AbstractCegarLoop]: Abstraction has 2598 states and 4269 transitions. [2020-07-20 15:01:18,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 4269 transitions. [2020-07-20 15:01:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 15:01:18,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:18,865 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] [2020-07-20 15:01:19,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:19,080 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1324326052, now seen corresponding path program 1 times [2020-07-20 15:01:19,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:19,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135146792] [2020-07-20 15:01:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:19,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:19,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:19,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135146792] [2020-07-20 15:01:19,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:19,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:19,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394809337] [2020-07-20 15:01:19,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:19,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:19,812 INFO L87 Difference]: Start difference. First operand 2598 states and 4269 transitions. Second operand 3 states. [2020-07-20 15:01:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:20,102 INFO L93 Difference]: Finished difference Result 7524 states and 12328 transitions. [2020-07-20 15:01:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:20,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-20 15:01:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:20,131 INFO L225 Difference]: With dead ends: 7524 [2020-07-20 15:01:20,131 INFO L226 Difference]: Without dead ends: 5140 [2020-07-20 15:01:20,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5140 states. [2020-07-20 15:01:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5140 to 5138. [2020-07-20 15:01:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5138 states. [2020-07-20 15:01:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 8417 transitions. [2020-07-20 15:01:20,342 INFO L78 Accepts]: Start accepts. Automaton has 5138 states and 8417 transitions. Word has length 469 [2020-07-20 15:01:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:20,343 INFO L479 AbstractCegarLoop]: Abstraction has 5138 states and 8417 transitions. [2020-07-20 15:01:20,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5138 states and 8417 transitions. [2020-07-20 15:01:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 15:01:20,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:20,362 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] [2020-07-20 15:01:20,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:20,576 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash 767211125, now seen corresponding path program 1 times [2020-07-20 15:01:20,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:20,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764577009] [2020-07-20 15:01:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:21,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:21,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:21,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:21,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764577009] [2020-07-20 15:01:21,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:21,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:21,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818803422] [2020-07-20 15:01:21,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:21,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:21,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:21,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:21,127 INFO L87 Difference]: Start difference. First operand 5138 states and 8417 transitions. Second operand 3 states. [2020-07-20 15:01:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:21,482 INFO L93 Difference]: Finished difference Result 15317 states and 25083 transitions. [2020-07-20 15:01:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:21,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-20 15:01:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:21,533 INFO L225 Difference]: With dead ends: 15317 [2020-07-20 15:01:21,534 INFO L226 Difference]: Without dead ends: 10231 [2020-07-20 15:01:21,544 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 [2020-07-20 15:01:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10231 states. [2020-07-20 15:01:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10231 to 5185. [2020-07-20 15:01:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2020-07-20 15:01:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 8491 transitions. [2020-07-20 15:01:21,821 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 8491 transitions. Word has length 470 [2020-07-20 15:01:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:21,822 INFO L479 AbstractCegarLoop]: Abstraction has 5185 states and 8491 transitions. [2020-07-20 15:01:21,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 8491 transitions. [2020-07-20 15:01:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 15:01:21,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:21,843 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] [2020-07-20 15:01:22,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:22,057 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:22,058 INFO L82 PathProgramCache]: Analyzing trace with hash 701299489, now seen corresponding path program 1 times [2020-07-20 15:01:22,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:22,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682841000] [2020-07-20 15:01:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:22,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:22,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:22,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:22,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:22,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682841000] [2020-07-20 15:01:22,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:22,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:22,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392515117] [2020-07-20 15:01:22,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:22,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:22,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:22,845 INFO L87 Difference]: Start difference. First operand 5185 states and 8491 transitions. Second operand 3 states. [2020-07-20 15:01:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:23,242 INFO L93 Difference]: Finished difference Result 14896 states and 24304 transitions. [2020-07-20 15:01:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:23,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-20 15:01:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:23,289 INFO L225 Difference]: With dead ends: 14896 [2020-07-20 15:01:23,289 INFO L226 Difference]: Without dead ends: 10110 [2020-07-20 15:01:23,303 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 [2020-07-20 15:01:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2020-07-20 15:01:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 10108. [2020-07-20 15:01:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10108 states. [2020-07-20 15:01:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10108 states to 10108 states and 16469 transitions. [2020-07-20 15:01:23,727 INFO L78 Accepts]: Start accepts. Automaton has 10108 states and 16469 transitions. Word has length 471 [2020-07-20 15:01:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:23,729 INFO L479 AbstractCegarLoop]: Abstraction has 10108 states and 16469 transitions. [2020-07-20 15:01:23,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10108 states and 16469 transitions. [2020-07-20 15:01:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 15:01:23,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:23,766 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] [2020-07-20 15:01:23,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:23,980 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -729357060, now seen corresponding path program 1 times [2020-07-20 15:01:23,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:23,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124408065] [2020-07-20 15:01:23,983 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 [2020-07-20 15:01:24,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:24,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:24,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:24,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124408065] [2020-07-20 15:01:24,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:24,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:24,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743157996] [2020-07-20 15:01:24,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:24,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:24,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:24,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:24,726 INFO L87 Difference]: Start difference. First operand 10108 states and 16469 transitions. Second operand 3 states. [2020-07-20 15:01:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:25,404 INFO L93 Difference]: Finished difference Result 30054 states and 48931 transitions. [2020-07-20 15:01:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:25,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-20 15:01:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:25,447 INFO L225 Difference]: With dead ends: 30054 [2020-07-20 15:01:25,447 INFO L226 Difference]: Without dead ends: 20085 [2020-07-20 15:01:25,468 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 [2020-07-20 15:01:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20085 states. [2020-07-20 15:01:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20085 to 10187. [2020-07-20 15:01:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10187 states. [2020-07-20 15:01:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10187 states to 10187 states and 16574 transitions. [2020-07-20 15:01:25,917 INFO L78 Accepts]: Start accepts. Automaton has 10187 states and 16574 transitions. Word has length 471 [2020-07-20 15:01:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:25,917 INFO L479 AbstractCegarLoop]: Abstraction has 10187 states and 16574 transitions. [2020-07-20 15:01:25,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10187 states and 16574 transitions. [2020-07-20 15:01:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 15:01:25,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:25,941 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] [2020-07-20 15:01:26,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:26,154 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash 142881038, now seen corresponding path program 1 times [2020-07-20 15:01:26,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:26,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589544356] [2020-07-20 15:01:26,155 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 [2020-07-20 15:01:26,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:26,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:26,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589544356] [2020-07-20 15:01:26,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:26,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:26,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361040325] [2020-07-20 15:01:26,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:26,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:26,800 INFO L87 Difference]: Start difference. First operand 10187 states and 16574 transitions. Second operand 3 states. [2020-07-20 15:01:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:27,352 INFO L93 Difference]: Finished difference Result 30214 states and 49152 transitions. [2020-07-20 15:01:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:27,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-20 15:01:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:27,402 INFO L225 Difference]: With dead ends: 30214 [2020-07-20 15:01:27,402 INFO L226 Difference]: Without dead ends: 20221 [2020-07-20 15:01:27,428 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 [2020-07-20 15:01:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20221 states. [2020-07-20 15:01:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20221 to 10323. [2020-07-20 15:01:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10323 states. [2020-07-20 15:01:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 16766 transitions. [2020-07-20 15:01:27,900 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 16766 transitions. Word has length 472 [2020-07-20 15:01:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:27,901 INFO L479 AbstractCegarLoop]: Abstraction has 10323 states and 16766 transitions. [2020-07-20 15:01:27,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 16766 transitions. [2020-07-20 15:01:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 15:01:27,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:27,923 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] [2020-07-20 15:01:28,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:28,138 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1283782970, now seen corresponding path program 1 times [2020-07-20 15:01:28,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:28,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598969160] [2020-07-20 15:01:28,139 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 [2020-07-20 15:01:29,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:29,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:29,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598969160] [2020-07-20 15:01:29,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:29,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:29,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47644636] [2020-07-20 15:01:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:29,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:29,288 INFO L87 Difference]: Start difference. First operand 10323 states and 16766 transitions. Second operand 3 states. [2020-07-20 15:01:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:29,934 INFO L93 Difference]: Finished difference Result 29286 states and 47445 transitions. [2020-07-20 15:01:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:29,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-20 15:01:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:29,961 INFO L225 Difference]: With dead ends: 29286 [2020-07-20 15:01:29,961 INFO L226 Difference]: Without dead ends: 19932 [2020-07-20 15:01:29,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2020-07-20 15:01:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 19930. [2020-07-20 15:01:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19930 states. [2020-07-20 15:01:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 32219 transitions. [2020-07-20 15:01:30,771 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 32219 transitions. Word has length 473 [2020-07-20 15:01:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:30,771 INFO L479 AbstractCegarLoop]: Abstraction has 19930 states and 32219 transitions. [2020-07-20 15:01:30,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 32219 transitions. [2020-07-20 15:01:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 15:01:30,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:30,806 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] [2020-07-20 15:01:31,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:31,008 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 653587017, now seen corresponding path program 1 times [2020-07-20 15:01:31,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:31,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407476273] [2020-07-20 15:01:31,010 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 [2020-07-20 15:01:31,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:01:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:31,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:31,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407476273] [2020-07-20 15:01:31,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:31,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:31,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526282817] [2020-07-20 15:01:31,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:31,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:31,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:31,563 INFO L87 Difference]: Start difference. First operand 19930 states and 32219 transitions. Second operand 4 states. [2020-07-20 15:01:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:33,149 INFO L93 Difference]: Finished difference Result 55160 states and 88684 transitions. [2020-07-20 15:01:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:01:33,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 15:01:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:33,234 INFO L225 Difference]: With dead ends: 55160 [2020-07-20 15:01:33,235 INFO L226 Difference]: Without dead ends: 37510 [2020-07-20 15:01:33,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37510 states. [2020-07-20 15:01:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37510 to 21223. [2020-07-20 15:01:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21223 states. [2020-07-20 15:01:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21223 states to 21223 states and 34498 transitions. [2020-07-20 15:01:34,268 INFO L78 Accepts]: Start accepts. Automaton has 21223 states and 34498 transitions. Word has length 473 [2020-07-20 15:01:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:34,268 INFO L479 AbstractCegarLoop]: Abstraction has 21223 states and 34498 transitions. [2020-07-20 15:01:34,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21223 states and 34498 transitions. [2020-07-20 15:01:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 15:01:34,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:34,292 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] [2020-07-20 15:01:34,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:34,499 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash -876543029, now seen corresponding path program 1 times [2020-07-20 15:01:34,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:34,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451100463] [2020-07-20 15:01:34,501 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 [2020-07-20 15:01:34,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:34,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:34,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:34,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451100463] [2020-07-20 15:01:34,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:34,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:34,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333351485] [2020-07-20 15:01:34,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:34,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:34,987 INFO L87 Difference]: Start difference. First operand 21223 states and 34498 transitions. Second operand 3 states. [2020-07-20 15:01:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:36,509 INFO L93 Difference]: Finished difference Result 56654 states and 91039 transitions. [2020-07-20 15:01:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:36,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-20 15:01:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:36,560 INFO L225 Difference]: With dead ends: 56654 [2020-07-20 15:01:36,560 INFO L226 Difference]: Without dead ends: 38953 [2020-07-20 15:01:36,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38953 states. [2020-07-20 15:01:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38953 to 21687. [2020-07-20 15:01:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21687 states. [2020-07-20 15:01:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21687 states to 21687 states and 35208 transitions. [2020-07-20 15:01:38,359 INFO L78 Accepts]: Start accepts. Automaton has 21687 states and 35208 transitions. Word has length 476 [2020-07-20 15:01:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:38,359 INFO L479 AbstractCegarLoop]: Abstraction has 21687 states and 35208 transitions. [2020-07-20 15:01:38,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 21687 states and 35208 transitions. [2020-07-20 15:01:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 15:01:38,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:38,378 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] [2020-07-20 15:01:38,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:38,579 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash -365881490, now seen corresponding path program 1 times [2020-07-20 15:01:38,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:38,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346068981] [2020-07-20 15:01:38,583 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 [2020-07-20 15:01:38,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:38,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:01:38,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:39,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:39,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346068981] [2020-07-20 15:01:39,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:39,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:39,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876669728] [2020-07-20 15:01:39,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:39,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:39,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:39,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:39,095 INFO L87 Difference]: Start difference. First operand 21687 states and 35208 transitions. Second operand 4 states. [2020-07-20 15:01:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:40,962 INFO L93 Difference]: Finished difference Result 51087 states and 83188 transitions. [2020-07-20 15:01:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:01:40,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 15:01:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:40,998 INFO L225 Difference]: With dead ends: 51087 [2020-07-20 15:01:40,998 INFO L226 Difference]: Without dead ends: 26750 [2020-07-20 15:01:41,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26750 states. [2020-07-20 15:01:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26750 to 26748. [2020-07-20 15:01:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26748 states. [2020-07-20 15:01:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26748 states to 26748 states and 43513 transitions. [2020-07-20 15:01:41,899 INFO L78 Accepts]: Start accepts. Automaton has 26748 states and 43513 transitions. Word has length 477 [2020-07-20 15:01:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:41,900 INFO L479 AbstractCegarLoop]: Abstraction has 26748 states and 43513 transitions. [2020-07-20 15:01:41,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 26748 states and 43513 transitions. [2020-07-20 15:01:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 15:01:41,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:41,932 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] [2020-07-20 15:01:42,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:42,147 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1873682358, now seen corresponding path program 1 times [2020-07-20 15:01:42,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:42,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094899623] [2020-07-20 15:01:42,149 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 [2020-07-20 15:01:42,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:01:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:42,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:42,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094899623] [2020-07-20 15:01:42,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:42,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:42,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20821572] [2020-07-20 15:01:42,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:42,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:42,933 INFO L87 Difference]: Start difference. First operand 26748 states and 43513 transitions. Second operand 4 states. [2020-07-20 15:01:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:44,828 INFO L93 Difference]: Finished difference Result 78356 states and 127498 transitions. [2020-07-20 15:01:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:01:44,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-20 15:01:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:44,880 INFO L225 Difference]: With dead ends: 78356 [2020-07-20 15:01:44,880 INFO L226 Difference]: Without dead ends: 52379 [2020-07-20 15:01:44,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52379 states. [2020-07-20 15:01:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52379 to 52377. [2020-07-20 15:01:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52377 states. [2020-07-20 15:01:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52377 states to 52377 states and 84805 transitions. [2020-07-20 15:01:48,040 INFO L78 Accepts]: Start accepts. Automaton has 52377 states and 84805 transitions. Word has length 479 [2020-07-20 15:01:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:48,041 INFO L479 AbstractCegarLoop]: Abstraction has 52377 states and 84805 transitions. [2020-07-20 15:01:48,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 52377 states and 84805 transitions. [2020-07-20 15:01:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 15:01:48,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:48,098 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] [2020-07-20 15:01:48,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:48,304 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1823926526, now seen corresponding path program 1 times [2020-07-20 15:01:48,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:48,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123103285] [2020-07-20 15:01:48,306 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 [2020-07-20 15:01:48,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:48,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:48,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:48,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123103285] [2020-07-20 15:01:48,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:48,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:48,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630918791] [2020-07-20 15:01:48,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:48,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:48,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:48,907 INFO L87 Difference]: Start difference. First operand 52377 states and 84805 transitions. Second operand 3 states. [2020-07-20 15:01:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:52,565 INFO L93 Difference]: Finished difference Result 153285 states and 248082 transitions. [2020-07-20 15:01:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:52,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 15:01:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:52,672 INFO L225 Difference]: With dead ends: 153285 [2020-07-20 15:01:52,672 INFO L226 Difference]: Without dead ends: 102811 [2020-07-20 15:01:52,709 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 [2020-07-20 15:01:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102811 states. [2020-07-20 15:01:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102811 to 102809. [2020-07-20 15:01:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102809 states. [2020-07-20 15:01:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102809 states to 102809 states and 165775 transitions. [2020-07-20 15:01:58,188 INFO L78 Accepts]: Start accepts. Automaton has 102809 states and 165775 transitions. Word has length 481 [2020-07-20 15:01:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:58,189 INFO L479 AbstractCegarLoop]: Abstraction has 102809 states and 165775 transitions. [2020-07-20 15:01:58,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 102809 states and 165775 transitions. [2020-07-20 15:01:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 15:01:58,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:58,277 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] [2020-07-20 15:01:58,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:58,478 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1482838271, now seen corresponding path program 1 times [2020-07-20 15:01:58,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:58,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938315470] [2020-07-20 15:01:58,480 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 [2020-07-20 15:01:58,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:58,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:59,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:59,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938315470] [2020-07-20 15:01:59,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:59,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:59,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632682077] [2020-07-20 15:01:59,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:59,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:59,331 INFO L87 Difference]: Start difference. First operand 102809 states and 165775 transitions. Second operand 3 states. [2020-07-20 15:02:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:07,785 INFO L93 Difference]: Finished difference Result 305602 states and 492686 transitions. [2020-07-20 15:02:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:02:07,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-20 15:02:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:08,018 INFO L225 Difference]: With dead ends: 305602 [2020-07-20 15:02:08,018 INFO L226 Difference]: Without dead ends: 203773 [2020-07-20 15:02:08,105 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 [2020-07-20 15:02:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203773 states. [2020-07-20 15:02:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203773 to 103102. [2020-07-20 15:02:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103102 states. [2020-07-20 15:02:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103102 states to 103102 states and 166217 transitions. [2020-07-20 15:02:15,752 INFO L78 Accepts]: Start accepts. Automaton has 103102 states and 166217 transitions. Word has length 482 [2020-07-20 15:02:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:15,753 INFO L479 AbstractCegarLoop]: Abstraction has 103102 states and 166217 transitions. [2020-07-20 15:02:15,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:02:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 103102 states and 166217 transitions. [2020-07-20 15:02:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 15:02:15,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:15,837 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] [2020-07-20 15:02:16,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:16,038 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1392386557, now seen corresponding path program 1 times [2020-07-20 15:02:16,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:16,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986864454] [2020-07-20 15:02:16,040 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 [2020-07-20 15:02:16,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:02:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:16,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:02:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:16,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:16,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986864454] [2020-07-20 15:02:16,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:16,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:02:16,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444481664] [2020-07-20 15:02:16,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:02:16,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:16,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:02:16,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:02:16,629 INFO L87 Difference]: Start difference. First operand 103102 states and 166217 transitions. Second operand 3 states. [2020-07-20 15:02:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:24,701 INFO L93 Difference]: Finished difference Result 304832 states and 491439 transitions. [2020-07-20 15:02:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:02:24,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-20 15:02:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:24,924 INFO L225 Difference]: With dead ends: 304832 [2020-07-20 15:02:24,924 INFO L226 Difference]: Without dead ends: 204073 [2020-07-20 15:02:25,006 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 [2020-07-20 15:02:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204073 states. [2020-07-20 15:02:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204073 to 204071. [2020-07-20 15:02:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204071 states. [2020-07-20 15:02:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204071 states to 204071 states and 327574 transitions. [2020-07-20 15:02:37,434 INFO L78 Accepts]: Start accepts. Automaton has 204071 states and 327574 transitions. Word has length 483 [2020-07-20 15:02:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:37,435 INFO L479 AbstractCegarLoop]: Abstraction has 204071 states and 327574 transitions. [2020-07-20 15:02:37,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:02:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 204071 states and 327574 transitions. [2020-07-20 15:02:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 15:02:37,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:37,618 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] [2020-07-20 15:02:37,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:37,819 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1471924190, now seen corresponding path program 1 times [2020-07-20 15:02:37,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:37,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845614831] [2020-07-20 15:02:37,821 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 [2020-07-20 15:02:38,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:02:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:38,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:02:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:38,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:38,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845614831] [2020-07-20 15:02:38,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:38,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:02:38,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762902126] [2020-07-20 15:02:38,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:02:38,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:02:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:02:38,280 INFO L87 Difference]: Start difference. First operand 204071 states and 327574 transitions. Second operand 3 states. [2020-07-20 15:02:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:58,251 INFO L93 Difference]: Finished difference Result 608161 states and 975984 transitions. [2020-07-20 15:02:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:02:58,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-20 15:02:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:58,752 INFO L225 Difference]: With dead ends: 608161 [2020-07-20 15:02:58,752 INFO L226 Difference]: Without dead ends: 405639 [2020-07-20 15:02:58,925 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 [2020-07-20 15:02:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405639 states. [2020-07-20 15:03:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405639 to 205061. [2020-07-20 15:03:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205061 states. [2020-07-20 15:03:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205061 states to 205061 states and 328938 transitions. [2020-07-20 15:03:17,232 INFO L78 Accepts]: Start accepts. Automaton has 205061 states and 328938 transitions. Word has length 483 [2020-07-20 15:03:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:17,233 INFO L479 AbstractCegarLoop]: Abstraction has 205061 states and 328938 transitions. [2020-07-20 15:03:17,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:03:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 205061 states and 328938 transitions. [2020-07-20 15:03:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 15:03:17,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:17,405 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] [2020-07-20 15:03:17,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:17,606 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1398508454, now seen corresponding path program 1 times [2020-07-20 15:03:17,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:17,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602338748] [2020-07-20 15:03:17,608 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 [2020-07-20 15:03:18,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:03:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:03:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:18,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:18,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602338748] [2020-07-20 15:03:18,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:18,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:03:18,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669234541] [2020-07-20 15:03:18,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:03:18,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:03:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:03:18,132 INFO L87 Difference]: Start difference. First operand 205061 states and 328938 transitions. Second operand 3 states. [2020-07-20 15:03:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:39,672 INFO L93 Difference]: Finished difference Result 611729 states and 981348 transitions. [2020-07-20 15:03:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:03:39,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-20 15:03:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:40,181 INFO L225 Difference]: With dead ends: 611729 [2020-07-20 15:03:40,181 INFO L226 Difference]: Without dead ends: 407997 [2020-07-20 15:03:40,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:03:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407997 states. [2020-07-20 15:03:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407997 to 206509. [2020-07-20 15:03:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206509 states. [2020-07-20 15:03:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206509 states to 206509 states and 330936 transitions. [2020-07-20 15:03:59,504 INFO L78 Accepts]: Start accepts. Automaton has 206509 states and 330936 transitions. Word has length 484 [2020-07-20 15:03:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:59,505 INFO L479 AbstractCegarLoop]: Abstraction has 206509 states and 330936 transitions. [2020-07-20 15:03:59,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:03:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 206509 states and 330936 transitions. [2020-07-20 15:03:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 15:03:59,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:59,726 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] [2020-07-20 15:03:59,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:59,927 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1411118824, now seen corresponding path program 1 times [2020-07-20 15:03:59,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:59,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976218362] [2020-07-20 15:03:59,928 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 [2020-07-20 15:04:00,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:00,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:01,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:01,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976218362] [2020-07-20 15:04:01,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:01,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:01,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599684790] [2020-07-20 15:04:01,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:01,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:01,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:01,263 INFO L87 Difference]: Start difference. First operand 206509 states and 330936 transitions. Second operand 3 states. [2020-07-20 15:04:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:24,264 INFO L93 Difference]: Finished difference Result 598979 states and 958975 transitions. [2020-07-20 15:04:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:24,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-20 15:04:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:24,770 INFO L225 Difference]: With dead ends: 598979 [2020-07-20 15:04:24,770 INFO L226 Difference]: Without dead ends: 406498 [2020-07-20 15:04:24,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406498 states. [2020-07-20 15:04:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406498 to 406496. [2020-07-20 15:04:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406496 states. [2020-07-20 15:04:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406496 states to 406496 states and 649044 transitions. [2020-07-20 15:04:55,816 INFO L78 Accepts]: Start accepts. Automaton has 406496 states and 649044 transitions. Word has length 485 [2020-07-20 15:04:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:55,817 INFO L479 AbstractCegarLoop]: Abstraction has 406496 states and 649044 transitions. [2020-07-20 15:04:55,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 406496 states and 649044 transitions. [2020-07-20 15:04:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 15:04:56,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:56,226 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] [2020-07-20 15:04:56,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:56,427 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:56,428 INFO L82 PathProgramCache]: Analyzing trace with hash -946478485, now seen corresponding path program 1 times [2020-07-20 15:04:56,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:56,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655671831] [2020-07-20 15:04:56,430 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 [2020-07-20 15:04:56,789 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:04:56,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:04:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:57,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:57,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655671831] [2020-07-20 15:04:57,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:57,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:57,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318183328] [2020-07-20 15:04:57,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:57,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:57,457 INFO L87 Difference]: Start difference. First operand 406496 states and 649044 transitions. Second operand 4 states. [2020-07-20 15:05:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:42,353 INFO L93 Difference]: Finished difference Result 1010304 states and 1616919 transitions. [2020-07-20 15:05:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:05:42,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 15:05:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:43,059 INFO L225 Difference]: With dead ends: 1010304 [2020-07-20 15:05:43,059 INFO L226 Difference]: Without dead ends: 527477 [2020-07-20 15:05:43,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527477 states. [2020-07-20 15:06:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527477 to 527475. [2020-07-20 15:06:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527475 states. [2020-07-20 15:06:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527475 states to 527475 states and 843800 transitions. [2020-07-20 15:06:22,977 INFO L78 Accepts]: Start accepts. Automaton has 527475 states and 843800 transitions. Word has length 485 [2020-07-20 15:06:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:22,977 INFO L479 AbstractCegarLoop]: Abstraction has 527475 states and 843800 transitions. [2020-07-20 15:06:22,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 527475 states and 843800 transitions. [2020-07-20 15:06:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 15:06:23,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:23,640 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] [2020-07-20 15:06:23,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:23,849 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1069886076, now seen corresponding path program 1 times [2020-07-20 15:06:23,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:23,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912222843] [2020-07-20 15:06:23,851 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 [2020-07-20 15:06:24,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:24,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:24,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:24,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912222843] [2020-07-20 15:06:24,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:24,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:24,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485193324] [2020-07-20 15:06:24,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:24,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:24,425 INFO L87 Difference]: Start difference. First operand 527475 states and 843800 transitions. Second operand 3 states. [2020-07-20 15:07:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:27,436 INFO L93 Difference]: Finished difference Result 1541511 states and 2465004 transitions. [2020-07-20 15:07:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:07:27,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 15:07:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:28,973 INFO L225 Difference]: With dead ends: 1541511 [2020-07-20 15:07:28,974 INFO L226 Difference]: Without dead ends: 1036381 [2020-07-20 15:07:29,411 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 [2020-07-20 15:07:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036381 states. [2020-07-20 15:09:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036381 to 1036379. [2020-07-20 15:09:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036379 states. [2020-07-20 15:09:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036379 states to 1036379 states and 1650894 transitions. [2020-07-20 15:09:07,070 INFO L78 Accepts]: Start accepts. Automaton has 1036379 states and 1650894 transitions. Word has length 486 [2020-07-20 15:09:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:07,070 INFO L479 AbstractCegarLoop]: Abstraction has 1036379 states and 1650894 transitions. [2020-07-20 15:09:07,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:09:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1036379 states and 1650894 transitions. [2020-07-20 15:09:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 15:09:08,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:08,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:09:08,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:08,704 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash 953555572, now seen corresponding path program 1 times [2020-07-20 15:09:08,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:08,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864224015] [2020-07-20 15:09:08,706 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 [2020-07-20 15:09:09,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:09:09,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:09:09,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:09:09,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:09,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864224015] [2020-07-20 15:09:09,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:09,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:09:09,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734198225] [2020-07-20 15:09:09,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:09:09,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:09:09,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:09,268 INFO L87 Difference]: Start difference. First operand 1036379 states and 1650894 transitions. Second operand 3 states.