/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:24:33,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:24:33,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:24:33,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:24:33,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:24:33,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:24:33,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:24:33,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:24:33,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:24:33,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:24:33,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:24:33,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:24:33,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:24:33,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:24:33,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:24:33,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:24:33,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:24:33,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:24:33,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:24:33,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:24:33,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:24:33,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:24:33,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:24:33,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:24:33,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:24:33,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:24:33,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:24:33,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:24:33,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:24:33,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:24:33,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:24:33,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:24:33,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:24:33,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:24:33,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:24:33,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:24:33,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:24:33,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:24:33,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:24:33,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:24:33,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:24:33,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:24:33,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:24:33,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:24:33,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:24:33,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:24:33,107 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:24:33,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:24:33,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:24:33,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:24:33,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:24:33,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:24:33,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:24:33,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:24:33,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:24:33,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:24:33,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:24:33,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:24:33,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:24:33,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:24:33,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:24:33,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:24:33,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:24:33,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:24:33,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:24:33,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:24:33,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:24:33,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:24:33,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:33,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:24:33,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:24:33,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:24:33,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:24:33,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:24:33,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:24:33,430 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:24:33,432 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:24:33,434 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:24:33,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9dcc803/c2c027d7f70c4e0ca3fdf58f3d2fcc71/FLAGcded7e3a7 [2020-07-21 17:24:34,213 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:24:34,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:24:34,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9dcc803/c2c027d7f70c4e0ca3fdf58f3d2fcc71/FLAGcded7e3a7 [2020-07-21 17:24:34,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9dcc803/c2c027d7f70c4e0ca3fdf58f3d2fcc71 [2020-07-21 17:24:34,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:24:34,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:24:34,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:24:34,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:24:34,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:24:34,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:34" (1/1) ... [2020-07-21 17:24:34,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3206aa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:34, skipping insertion in model container [2020-07-21 17:24:34,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:34" (1/1) ... [2020-07-21 17:24:34,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:24:34,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:24:36,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:24:36,154 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:24:37,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:24:37,250 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:24:37,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37 WrapperNode [2020-07-21 17:24:37,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:24:37,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:24:37,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:24:37,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:24:37,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:24:37,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:24:37,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:24:37,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:24:37,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:24:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:24:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:24:37,581 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:24:37,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:24:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:24:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:24:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:24:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:24:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:24:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:24:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:24:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:24:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:24:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:24:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:24:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:24:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:24:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 17:24:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:24:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:24:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:24:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:24:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:24:42,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:24:42,158 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:24:42,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:42 BoogieIcfgContainer [2020-07-21 17:24:42,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:24:42,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:24:42,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:24:42,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:24:42,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:24:34" (1/3) ... [2020-07-21 17:24:42,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4d53bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:42, skipping insertion in model container [2020-07-21 17:24:42,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37" (2/3) ... [2020-07-21 17:24:42,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4d53bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:42, skipping insertion in model container [2020-07-21 17:24:42,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:42" (3/3) ... [2020-07-21 17:24:42,194 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:24:42,205 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:24:42,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 17:24:42,234 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 17:24:42,265 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:24:42,265 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:24:42,265 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:24:42,265 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:24:42,266 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:24:42,266 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:24:42,266 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:24:42,266 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:24:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-21 17:24:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 17:24:42,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:42,357 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] [2020-07-21 17:24:42,357 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:42,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-21 17:24:42,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:42,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883529062] [2020-07-21 17:24:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:43,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:43,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:24:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:43,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:43,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883529062] [2020-07-21 17:24:43,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:43,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:24:43,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808795470] [2020-07-21 17:24:43,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:24:43,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:24:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:24:43,910 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-21 17:24:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:44,448 INFO L93 Difference]: Finished difference Result 4120 states and 7457 transitions. [2020-07-21 17:24:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:24:44,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 17:24:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:44,494 INFO L225 Difference]: With dead ends: 4120 [2020-07-21 17:24:44,495 INFO L226 Difference]: Without dead ends: 2738 [2020-07-21 17:24:44,510 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 [2020-07-21 17:24:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2020-07-21 17:24:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2707. [2020-07-21 17:24:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2707 states. [2020-07-21 17:24:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 4430 transitions. [2020-07-21 17:24:44,766 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 4430 transitions. Word has length 473 [2020-07-21 17:24:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:44,770 INFO L479 AbstractCegarLoop]: Abstraction has 2707 states and 4430 transitions. [2020-07-21 17:24:44,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:24:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 4430 transitions. [2020-07-21 17:24:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 17:24:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:44,789 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] [2020-07-21 17:24:45,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:45,003 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:45,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1002795308, now seen corresponding path program 1 times [2020-07-21 17:24:45,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:45,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447060960] [2020-07-21 17:24:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:45,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:45,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:45,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447060960] [2020-07-21 17:24:45,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:45,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:45,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99969071] [2020-07-21 17:24:45,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:45,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:45,965 INFO L87 Difference]: Start difference. First operand 2707 states and 4430 transitions. Second operand 3 states. [2020-07-21 17:24:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:46,282 INFO L93 Difference]: Finished difference Result 7870 states and 12849 transitions. [2020-07-21 17:24:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:46,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 17:24:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:46,313 INFO L225 Difference]: With dead ends: 7870 [2020-07-21 17:24:46,313 INFO L226 Difference]: Without dead ends: 5326 [2020-07-21 17:24:46,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2020-07-21 17:24:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5297. [2020-07-21 17:24:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5297 states. [2020-07-21 17:24:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 8642 transitions. [2020-07-21 17:24:46,521 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 8642 transitions. Word has length 475 [2020-07-21 17:24:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:46,522 INFO L479 AbstractCegarLoop]: Abstraction has 5297 states and 8642 transitions. [2020-07-21 17:24:46,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 8642 transitions. [2020-07-21 17:24:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 17:24:46,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:46,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:46,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:46,758 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2020364490, now seen corresponding path program 1 times [2020-07-21 17:24:46,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:46,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124953005] [2020-07-21 17:24:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:47,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:47,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:47,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:47,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124953005] [2020-07-21 17:24:47,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:47,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:47,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961248381] [2020-07-21 17:24:47,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:47,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:47,546 INFO L87 Difference]: Start difference. First operand 5297 states and 8642 transitions. Second operand 3 states. [2020-07-21 17:24:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:47,957 INFO L93 Difference]: Finished difference Result 15724 states and 25627 transitions. [2020-07-21 17:24:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:47,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 17:24:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:48,015 INFO L225 Difference]: With dead ends: 15724 [2020-07-21 17:24:48,015 INFO L226 Difference]: Without dead ends: 10451 [2020-07-21 17:24:48,030 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 [2020-07-21 17:24:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10451 states. [2020-07-21 17:24:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10451 to 5322. [2020-07-21 17:24:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5322 states. [2020-07-21 17:24:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 8680 transitions. [2020-07-21 17:24:48,467 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 8680 transitions. Word has length 476 [2020-07-21 17:24:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:48,468 INFO L479 AbstractCegarLoop]: Abstraction has 5322 states and 8680 transitions. [2020-07-21 17:24:48,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 8680 transitions. [2020-07-21 17:24:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 17:24:48,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:48,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:48,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:48,698 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1604778927, now seen corresponding path program 1 times [2020-07-21 17:24:48,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:48,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607261912] [2020-07-21 17:24:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:49,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:24:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:49,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:49,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607261912] [2020-07-21 17:24:49,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:49,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:24:49,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422446190] [2020-07-21 17:24:49,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:24:49,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:49,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:24:49,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:24:49,518 INFO L87 Difference]: Start difference. First operand 5322 states and 8680 transitions. Second operand 4 states. [2020-07-21 17:24:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:49,971 INFO L93 Difference]: Finished difference Result 12684 states and 20885 transitions. [2020-07-21 17:24:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:24:49,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-21 17:24:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:50,020 INFO L225 Difference]: With dead ends: 12684 [2020-07-21 17:24:50,021 INFO L226 Difference]: Without dead ends: 6414 [2020-07-21 17:24:50,035 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 [2020-07-21 17:24:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2020-07-21 17:24:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 6385. [2020-07-21 17:24:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6385 states. [2020-07-21 17:24:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 10481 transitions. [2020-07-21 17:24:50,345 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 10481 transitions. Word has length 477 [2020-07-21 17:24:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:50,345 INFO L479 AbstractCegarLoop]: Abstraction has 6385 states and 10481 transitions. [2020-07-21 17:24:50,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:24:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 10481 transitions. [2020-07-21 17:24:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 17:24:50,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:50,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:50,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:50,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:50,582 INFO L82 PathProgramCache]: Analyzing trace with hash 775272611, now seen corresponding path program 1 times [2020-07-21 17:24:50,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:50,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793149013] [2020-07-21 17:24:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:51,228 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:51,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:51,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:51,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793149013] [2020-07-21 17:24:51,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:51,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:51,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220921846] [2020-07-21 17:24:51,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:51,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:51,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:51,935 INFO L87 Difference]: Start difference. First operand 6385 states and 10481 transitions. Second operand 3 states. [2020-07-21 17:24:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:52,439 INFO L93 Difference]: Finished difference Result 18516 states and 30320 transitions. [2020-07-21 17:24:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:52,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 17:24:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:52,477 INFO L225 Difference]: With dead ends: 18516 [2020-07-21 17:24:52,477 INFO L226 Difference]: Without dead ends: 12662 [2020-07-21 17:24:52,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2020-07-21 17:24:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 12552. [2020-07-21 17:24:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12552 states. [2020-07-21 17:24:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12552 states to 12552 states and 20532 transitions. [2020-07-21 17:24:52,966 INFO L78 Accepts]: Start accepts. Automaton has 12552 states and 20532 transitions. Word has length 478 [2020-07-21 17:24:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:52,966 INFO L479 AbstractCegarLoop]: Abstraction has 12552 states and 20532 transitions. [2020-07-21 17:24:52,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 12552 states and 20532 transitions. [2020-07-21 17:24:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 17:24:52,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:52,999 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] [2020-07-21 17:24:53,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:53,214 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1715357784, now seen corresponding path program 1 times [2020-07-21 17:24:53,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:53,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647675219] [2020-07-21 17:24:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:53,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:53,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:53,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:53,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647675219] [2020-07-21 17:24:53,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:53,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:53,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137424834] [2020-07-21 17:24:53,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:53,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:53,977 INFO L87 Difference]: Start difference. First operand 12552 states and 20532 transitions. Second operand 3 states. [2020-07-21 17:24:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:55,104 INFO L93 Difference]: Finished difference Result 37319 states and 61008 transitions. [2020-07-21 17:24:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:55,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 17:24:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:55,159 INFO L225 Difference]: With dead ends: 37319 [2020-07-21 17:24:55,159 INFO L226 Difference]: Without dead ends: 24904 [2020-07-21 17:24:55,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24904 states. [2020-07-21 17:24:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24904 to 12624. [2020-07-21 17:24:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12624 states. [2020-07-21 17:24:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12624 states to 12624 states and 20630 transitions. [2020-07-21 17:24:55,780 INFO L78 Accepts]: Start accepts. Automaton has 12624 states and 20630 transitions. Word has length 479 [2020-07-21 17:24:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:55,781 INFO L479 AbstractCegarLoop]: Abstraction has 12624 states and 20630 transitions. [2020-07-21 17:24:55,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 12624 states and 20630 transitions. [2020-07-21 17:24:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 17:24:55,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:55,806 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:56,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:56,020 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1642694422, now seen corresponding path program 1 times [2020-07-21 17:24:56,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:56,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053997218] [2020-07-21 17:24:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:56,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:56,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:56,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:56,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:56,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:56,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053997218] [2020-07-21 17:24:56,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:56,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:56,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406197781] [2020-07-21 17:24:56,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:56,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:56,690 INFO L87 Difference]: Start difference. First operand 12624 states and 20630 transitions. Second operand 3 states. [2020-07-21 17:24:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:57,418 INFO L93 Difference]: Finished difference Result 37136 states and 60654 transitions. [2020-07-21 17:24:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:57,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 17:24:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:57,478 INFO L225 Difference]: With dead ends: 37136 [2020-07-21 17:24:57,478 INFO L226 Difference]: Without dead ends: 24886 [2020-07-21 17:24:57,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24886 states. [2020-07-21 17:24:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24886 to 12776. [2020-07-21 17:24:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12776 states. [2020-07-21 17:24:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12776 states to 12776 states and 20854 transitions. [2020-07-21 17:24:58,153 INFO L78 Accepts]: Start accepts. Automaton has 12776 states and 20854 transitions. Word has length 480 [2020-07-21 17:24:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:58,153 INFO L479 AbstractCegarLoop]: Abstraction has 12776 states and 20854 transitions. [2020-07-21 17:24:58,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 12776 states and 20854 transitions. [2020-07-21 17:24:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 17:24:58,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:58,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:58,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:58,391 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash 692263589, now seen corresponding path program 1 times [2020-07-21 17:24:58,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:58,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178260623] [2020-07-21 17:24:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:59,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:59,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:59,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:59,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178260623] [2020-07-21 17:24:59,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:59,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:59,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477214544] [2020-07-21 17:24:59,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:59,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:59,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:59,246 INFO L87 Difference]: Start difference. First operand 12776 states and 20854 transitions. Second operand 3 states. [2020-07-21 17:24:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:59,807 INFO L93 Difference]: Finished difference Result 38076 states and 62164 transitions. [2020-07-21 17:24:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:59,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 17:24:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:59,860 INFO L225 Difference]: With dead ends: 38076 [2020-07-21 17:24:59,860 INFO L226 Difference]: Without dead ends: 25434 [2020-07-21 17:24:59,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2020-07-21 17:25:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 12878. [2020-07-21 17:25:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12878 states. [2020-07-21 17:25:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12878 states to 12878 states and 20997 transitions. [2020-07-21 17:25:01,101 INFO L78 Accepts]: Start accepts. Automaton has 12878 states and 20997 transitions. Word has length 480 [2020-07-21 17:25:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:01,101 INFO L479 AbstractCegarLoop]: Abstraction has 12878 states and 20997 transitions. [2020-07-21 17:25:01,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12878 states and 20997 transitions. [2020-07-21 17:25:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 17:25:01,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:01,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:01,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:01,331 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1683258483, now seen corresponding path program 1 times [2020-07-21 17:25:01,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:01,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396103025] [2020-07-21 17:25:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:01,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:01,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2923 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:02,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:02,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396103025] [2020-07-21 17:25:02,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:02,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:02,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027229710] [2020-07-21 17:25:02,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:02,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:02,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:02,214 INFO L87 Difference]: Start difference. First operand 12878 states and 20997 transitions. Second operand 3 states. [2020-07-21 17:25:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:03,115 INFO L93 Difference]: Finished difference Result 36391 states and 59211 transitions. [2020-07-21 17:25:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:03,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 17:25:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:03,156 INFO L225 Difference]: With dead ends: 36391 [2020-07-21 17:25:03,157 INFO L226 Difference]: Without dead ends: 25047 [2020-07-21 17:25:03,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25047 states. [2020-07-21 17:25:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25047 to 25020. [2020-07-21 17:25:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25020 states. [2020-07-21 17:25:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25020 states to 25020 states and 40670 transitions. [2020-07-21 17:25:04,021 INFO L78 Accepts]: Start accepts. Automaton has 25020 states and 40670 transitions. Word has length 481 [2020-07-21 17:25:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:04,021 INFO L479 AbstractCegarLoop]: Abstraction has 25020 states and 40670 transitions. [2020-07-21 17:25:04,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 25020 states and 40670 transitions. [2020-07-21 17:25:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 17:25:04,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:04,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:04,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:04,243 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:04,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:04,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2037709606, now seen corresponding path program 1 times [2020-07-21 17:25:04,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:04,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933270273] [2020-07-21 17:25:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:04,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:05,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:05,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933270273] [2020-07-21 17:25:05,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:05,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:05,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771370989] [2020-07-21 17:25:05,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:05,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:05,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:05,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:05,136 INFO L87 Difference]: Start difference. First operand 25020 states and 40670 transitions. Second operand 3 states. [2020-07-21 17:25:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:06,701 INFO L93 Difference]: Finished difference Result 73524 states and 119482 transitions. [2020-07-21 17:25:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:06,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 17:25:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:06,748 INFO L225 Difference]: With dead ends: 73524 [2020-07-21 17:25:06,748 INFO L226 Difference]: Without dead ends: 49272 [2020-07-21 17:25:06,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49272 states. [2020-07-21 17:25:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49272 to 25424. [2020-07-21 17:25:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25424 states. [2020-07-21 17:25:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25424 states to 25424 states and 41220 transitions. [2020-07-21 17:25:07,680 INFO L78 Accepts]: Start accepts. Automaton has 25424 states and 41220 transitions. Word has length 482 [2020-07-21 17:25:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:07,680 INFO L479 AbstractCegarLoop]: Abstraction has 25424 states and 41220 transitions. [2020-07-21 17:25:07,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 25424 states and 41220 transitions. [2020-07-21 17:25:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 17:25:07,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:07,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:07,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:07,920 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 917289402, now seen corresponding path program 1 times [2020-07-21 17:25:07,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:07,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975774131] [2020-07-21 17:25:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:08,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:08,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:08,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975774131] [2020-07-21 17:25:08,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:08,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:08,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370183470] [2020-07-21 17:25:08,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:08,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:08,602 INFO L87 Difference]: Start difference. First operand 25424 states and 41220 transitions. Second operand 3 states. [2020-07-21 17:25:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:10,039 INFO L93 Difference]: Finished difference Result 73774 states and 119470 transitions. [2020-07-21 17:25:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:10,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 17:25:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:10,091 INFO L225 Difference]: With dead ends: 73774 [2020-07-21 17:25:10,091 INFO L226 Difference]: Without dead ends: 48524 [2020-07-21 17:25:10,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48524 states. [2020-07-21 17:25:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48524 to 25345. [2020-07-21 17:25:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25345 states. [2020-07-21 17:25:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25345 states to 25345 states and 41081 transitions. [2020-07-21 17:25:12,181 INFO L78 Accepts]: Start accepts. Automaton has 25345 states and 41081 transitions. Word has length 482 [2020-07-21 17:25:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:12,182 INFO L479 AbstractCegarLoop]: Abstraction has 25345 states and 41081 transitions. [2020-07-21 17:25:12,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 25345 states and 41081 transitions. [2020-07-21 17:25:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 17:25:12,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:12,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:12,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:12,425 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash 70098175, now seen corresponding path program 1 times [2020-07-21 17:25:12,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:12,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308094762] [2020-07-21 17:25:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:13,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:13,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:13,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:25:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:13,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:13,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308094762] [2020-07-21 17:25:13,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:13,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:13,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220309103] [2020-07-21 17:25:13,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:13,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:13,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:13,172 INFO L87 Difference]: Start difference. First operand 25345 states and 41081 transitions. Second operand 4 states. [2020-07-21 17:25:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:14,700 INFO L93 Difference]: Finished difference Result 61460 states and 100513 transitions. [2020-07-21 17:25:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:14,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-21 17:25:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:14,739 INFO L225 Difference]: With dead ends: 61460 [2020-07-21 17:25:14,739 INFO L226 Difference]: Without dead ends: 31650 [2020-07-21 17:25:14,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31650 states. [2020-07-21 17:25:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31650 to 31458. [2020-07-21 17:25:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31458 states. [2020-07-21 17:25:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31458 states to 31458 states and 51116 transitions. [2020-07-21 17:25:15,865 INFO L78 Accepts]: Start accepts. Automaton has 31458 states and 51116 transitions. Word has length 483 [2020-07-21 17:25:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:15,866 INFO L479 AbstractCegarLoop]: Abstraction has 31458 states and 51116 transitions. [2020-07-21 17:25:15,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31458 states and 51116 transitions. [2020-07-21 17:25:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 17:25:15,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:15,893 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] [2020-07-21 17:25:16,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:16,094 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash -5673666, now seen corresponding path program 1 times [2020-07-21 17:25:16,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:16,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114148780] [2020-07-21 17:25:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:16,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:16,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:16,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:17,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:17,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114148780] [2020-07-21 17:25:17,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:17,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:17,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201620924] [2020-07-21 17:25:17,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:17,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:17,009 INFO L87 Difference]: Start difference. First operand 31458 states and 51116 transitions. Second operand 3 states. [2020-07-21 17:25:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:19,174 INFO L93 Difference]: Finished difference Result 92463 states and 150327 transitions. [2020-07-21 17:25:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:19,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 17:25:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:19,238 INFO L225 Difference]: With dead ends: 92463 [2020-07-21 17:25:19,239 INFO L226 Difference]: Without dead ends: 61743 [2020-07-21 17:25:19,265 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 [2020-07-21 17:25:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61743 states. [2020-07-21 17:25:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61743 to 32265. [2020-07-21 17:25:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32265 states. [2020-07-21 17:25:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32265 states to 32265 states and 52201 transitions. [2020-07-21 17:25:20,559 INFO L78 Accepts]: Start accepts. Automaton has 32265 states and 52201 transitions. Word has length 484 [2020-07-21 17:25:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:20,560 INFO L479 AbstractCegarLoop]: Abstraction has 32265 states and 52201 transitions. [2020-07-21 17:25:20,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 32265 states and 52201 transitions. [2020-07-21 17:25:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 17:25:20,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:20,588 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] [2020-07-21 17:25:20,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:20,794 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:20,795 INFO L82 PathProgramCache]: Analyzing trace with hash -602748171, now seen corresponding path program 1 times [2020-07-21 17:25:20,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:20,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804773404] [2020-07-21 17:25:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:21,364 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:21,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2525 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:21,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:21,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804773404] [2020-07-21 17:25:21,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:21,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:21,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526248405] [2020-07-21 17:25:21,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:21,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:21,477 INFO L87 Difference]: Start difference. First operand 32265 states and 52201 transitions. Second operand 3 states. [2020-07-21 17:25:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:23,769 INFO L93 Difference]: Finished difference Result 89731 states and 145273 transitions. [2020-07-21 17:25:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:23,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 17:25:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:23,841 INFO L225 Difference]: With dead ends: 89731 [2020-07-21 17:25:23,841 INFO L226 Difference]: Without dead ends: 57811 [2020-07-21 17:25:23,881 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 [2020-07-21 17:25:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57811 states. [2020-07-21 17:25:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57811 to 31733. [2020-07-21 17:25:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31733 states. [2020-07-21 17:25:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31733 states to 31733 states and 51409 transitions. [2020-07-21 17:25:26,626 INFO L78 Accepts]: Start accepts. Automaton has 31733 states and 51409 transitions. Word has length 484 [2020-07-21 17:25:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:26,626 INFO L479 AbstractCegarLoop]: Abstraction has 31733 states and 51409 transitions. [2020-07-21 17:25:26,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31733 states and 51409 transitions. [2020-07-21 17:25:26,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 17:25:26,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:26,657 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] [2020-07-21 17:25:26,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:26,858 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1400290867, now seen corresponding path program 1 times [2020-07-21 17:25:26,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:26,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381683736] [2020-07-21 17:25:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:27,448 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:27,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:25:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:27,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:27,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381683736] [2020-07-21 17:25:27,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:27,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:27,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66216957] [2020-07-21 17:25:27,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:27,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:27,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:27,575 INFO L87 Difference]: Start difference. First operand 31733 states and 51409 transitions. Second operand 3 states. [2020-07-21 17:25:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:30,757 INFO L93 Difference]: Finished difference Result 56951 states and 89745 transitions. [2020-07-21 17:25:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:30,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 17:25:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:30,798 INFO L225 Difference]: With dead ends: 56951 [2020-07-21 17:25:30,798 INFO L226 Difference]: Without dead ends: 44303 [2020-07-21 17:25:30,812 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 [2020-07-21 17:25:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44303 states. [2020-07-21 17:25:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44303 to 44023. [2020-07-21 17:25:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44023 states. [2020-07-21 17:25:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44023 states to 44023 states and 69769 transitions. [2020-07-21 17:25:32,665 INFO L78 Accepts]: Start accepts. Automaton has 44023 states and 69769 transitions. Word has length 485 [2020-07-21 17:25:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:32,665 INFO L479 AbstractCegarLoop]: Abstraction has 44023 states and 69769 transitions. [2020-07-21 17:25:32,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 44023 states and 69769 transitions. [2020-07-21 17:25:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 17:25:32,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:32,701 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] [2020-07-21 17:25:32,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:32,907 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash 19748387, now seen corresponding path program 1 times [2020-07-21 17:25:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:32,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079182131] [2020-07-21 17:25:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:33,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:33,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2941 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:25:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:33,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:33,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079182131] [2020-07-21 17:25:33,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:33,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:33,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807966242] [2020-07-21 17:25:33,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:33,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:33,977 INFO L87 Difference]: Start difference. First operand 44023 states and 69769 transitions. Second operand 4 states. [2020-07-21 17:25:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:37,924 INFO L93 Difference]: Finished difference Result 126749 states and 201157 transitions. [2020-07-21 17:25:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:37,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 17:25:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:38,013 INFO L225 Difference]: With dead ends: 126749 [2020-07-21 17:25:38,013 INFO L226 Difference]: Without dead ends: 84519 [2020-07-21 17:25:38,051 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 [2020-07-21 17:25:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84519 states. [2020-07-21 17:25:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84519 to 84399. [2020-07-21 17:25:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84399 states. [2020-07-21 17:25:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84399 states to 84399 states and 133276 transitions. [2020-07-21 17:25:43,811 INFO L78 Accepts]: Start accepts. Automaton has 84399 states and 133276 transitions. Word has length 485 [2020-07-21 17:25:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:43,812 INFO L479 AbstractCegarLoop]: Abstraction has 84399 states and 133276 transitions. [2020-07-21 17:25:43,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 84399 states and 133276 transitions. [2020-07-21 17:25:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 17:25:43,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:43,877 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] [2020-07-21 17:25:44,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:44,078 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1457658508, now seen corresponding path program 1 times [2020-07-21 17:25:44,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:44,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400181303] [2020-07-21 17:25:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:44,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:44,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:44,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:44,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400181303] [2020-07-21 17:25:44,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:44,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:44,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655517023] [2020-07-21 17:25:44,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:44,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:44,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:44,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:44,906 INFO L87 Difference]: Start difference. First operand 84399 states and 133276 transitions. Second operand 3 states. [2020-07-21 17:25:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:54,363 INFO L93 Difference]: Finished difference Result 244991 states and 386797 transitions. [2020-07-21 17:25:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:54,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 17:25:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:54,558 INFO L225 Difference]: With dead ends: 244991 [2020-07-21 17:25:54,559 INFO L226 Difference]: Without dead ends: 165427 [2020-07-21 17:25:54,634 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 [2020-07-21 17:25:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165427 states. [2020-07-21 17:26:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165427 to 165235. [2020-07-21 17:26:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165235 states. [2020-07-21 17:26:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165235 states to 165235 states and 260019 transitions. [2020-07-21 17:26:05,188 INFO L78 Accepts]: Start accepts. Automaton has 165235 states and 260019 transitions. Word has length 485 [2020-07-21 17:26:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:05,189 INFO L479 AbstractCegarLoop]: Abstraction has 165235 states and 260019 transitions. [2020-07-21 17:26:05,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 165235 states and 260019 transitions. [2020-07-21 17:26:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 17:26:05,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:05,360 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] [2020-07-21 17:26:05,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:05,561 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:05,562 INFO L82 PathProgramCache]: Analyzing trace with hash 678175951, now seen corresponding path program 1 times [2020-07-21 17:26:05,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:05,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277011644] [2020-07-21 17:26:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:06,129 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:06,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:06,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2523 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:26:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:06,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:06,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277011644] [2020-07-21 17:26:06,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:06,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:06,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310653405] [2020-07-21 17:26:06,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:06,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:06,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:06,277 INFO L87 Difference]: Start difference. First operand 165235 states and 260019 transitions. Second operand 4 states. [2020-07-21 17:26:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:24,195 INFO L93 Difference]: Finished difference Result 471275 states and 739202 transitions. [2020-07-21 17:26:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:24,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 17:26:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:24,557 INFO L225 Difference]: With dead ends: 471275 [2020-07-21 17:26:24,558 INFO L226 Difference]: Without dead ends: 319403 [2020-07-21 17:26:24,692 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 [2020-07-21 17:26:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319403 states. [2020-07-21 17:26:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319403 to 174479. [2020-07-21 17:26:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174479 states. [2020-07-21 17:26:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174479 states to 174479 states and 275777 transitions. [2020-07-21 17:26:38,820 INFO L78 Accepts]: Start accepts. Automaton has 174479 states and 275777 transitions. Word has length 485 [2020-07-21 17:26:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:38,820 INFO L479 AbstractCegarLoop]: Abstraction has 174479 states and 275777 transitions. [2020-07-21 17:26:38,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:26:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 174479 states and 275777 transitions. [2020-07-21 17:26:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 17:26:38,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:38,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:39,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:39,176 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1921735643, now seen corresponding path program 1 times [2020-07-21 17:26:39,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:39,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231657812] [2020-07-21 17:26:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:39,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2520 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:26:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:39,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231657812] [2020-07-21 17:26:39,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:39,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:39,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766491659] [2020-07-21 17:26:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:39,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:39,888 INFO L87 Difference]: Start difference. First operand 174479 states and 275777 transitions. Second operand 4 states. [2020-07-21 17:26:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:57,423 INFO L93 Difference]: Finished difference Result 409019 states and 651854 transitions. [2020-07-21 17:26:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:57,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 17:26:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:57,704 INFO L225 Difference]: With dead ends: 409019 [2020-07-21 17:26:57,704 INFO L226 Difference]: Without dead ends: 216092 [2020-07-21 17:26:57,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216092 states. [2020-07-21 17:27:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216092 to 216065. [2020-07-21 17:27:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216065 states. [2020-07-21 17:27:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216065 states to 216065 states and 343539 transitions. [2020-07-21 17:27:14,740 INFO L78 Accepts]: Start accepts. Automaton has 216065 states and 343539 transitions. Word has length 486 [2020-07-21 17:27:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:14,741 INFO L479 AbstractCegarLoop]: Abstraction has 216065 states and 343539 transitions. [2020-07-21 17:27:14,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 216065 states and 343539 transitions. [2020-07-21 17:27:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 17:27:14,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:14,912 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] [2020-07-21 17:27:15,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:15,113 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1446272226, now seen corresponding path program 1 times [2020-07-21 17:27:15,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:15,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289801708] [2020-07-21 17:27:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:15,780 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2944 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:15,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:15,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289801708] [2020-07-21 17:27:15,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:15,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:15,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987261522] [2020-07-21 17:27:15,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:15,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:15,963 INFO L87 Difference]: Start difference. First operand 216065 states and 343539 transitions. Second operand 3 states. [2020-07-21 17:27:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:45,424 INFO L93 Difference]: Finished difference Result 616302 states and 978005 transitions. [2020-07-21 17:27:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:45,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 17:27:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:45,927 INFO L225 Difference]: With dead ends: 616302 [2020-07-21 17:27:45,927 INFO L226 Difference]: Without dead ends: 418580 [2020-07-21 17:27:46,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418580 states. [2020-07-21 17:28:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418580 to 418476. [2020-07-21 17:28:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418476 states. [2020-07-21 17:28:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418476 states to 418476 states and 662188 transitions. [2020-07-21 17:28:16,938 INFO L78 Accepts]: Start accepts. Automaton has 418476 states and 662188 transitions. Word has length 487 [2020-07-21 17:28:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:16,938 INFO L479 AbstractCegarLoop]: Abstraction has 418476 states and 662188 transitions. [2020-07-21 17:28:16,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 418476 states and 662188 transitions. [2020-07-21 17:28:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:28:17,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:17,328 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] [2020-07-21 17:28:17,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:17,528 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:17,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1753685625, now seen corresponding path program 1 times [2020-07-21 17:28:17,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:17,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506995754] [2020-07-21 17:28:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:18,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:18,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:18,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:18,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:18,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:18,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506995754] [2020-07-21 17:28:18,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:18,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:18,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289552760] [2020-07-21 17:28:18,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:18,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:18,220 INFO L87 Difference]: Start difference. First operand 418476 states and 662188 transitions. Second operand 3 states. [2020-07-21 17:29:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:14,607 INFO L93 Difference]: Finished difference Result 1151762 states and 1807629 transitions. [2020-07-21 17:29:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:14,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:29:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:15,575 INFO L225 Difference]: With dead ends: 1151762 [2020-07-21 17:29:15,576 INFO L226 Difference]: Without dead ends: 785420 [2020-07-21 17:29:15,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785420 states. [2020-07-21 17:29:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785420 to 430412. [2020-07-21 17:29:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430412 states. [2020-07-21 17:29:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430412 states to 430412 states and 679455 transitions. [2020-07-21 17:29:54,868 INFO L78 Accepts]: Start accepts. Automaton has 430412 states and 679455 transitions. Word has length 488 [2020-07-21 17:29:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:54,869 INFO L479 AbstractCegarLoop]: Abstraction has 430412 states and 679455 transitions. [2020-07-21 17:29:54,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 430412 states and 679455 transitions. [2020-07-21 17:29:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:29:55,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:55,251 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] [2020-07-21 17:29:55,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:55,452 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1653951966, now seen corresponding path program 1 times [2020-07-21 17:29:55,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:55,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911461717] [2020-07-21 17:29:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:56,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:56,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:57,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:57,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911461717] [2020-07-21 17:29:57,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:57,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:57,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713485468] [2020-07-21 17:29:57,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:57,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:57,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:57,028 INFO L87 Difference]: Start difference. First operand 430412 states and 679455 transitions. Second operand 3 states. [2020-07-21 17:30:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:52,611 INFO L93 Difference]: Finished difference Result 1164384 states and 1823545 transitions. [2020-07-21 17:30:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:30:52,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:30:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:53,799 INFO L225 Difference]: With dead ends: 1164384 [2020-07-21 17:30:53,799 INFO L226 Difference]: Without dead ends: 792034 [2020-07-21 17:30:54,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792034 states. [2020-07-21 17:31:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792034 to 440980. [2020-07-21 17:31:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440980 states. [2020-07-21 17:31:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440980 states to 440980 states and 692903 transitions. [2020-07-21 17:31:38,054 INFO L78 Accepts]: Start accepts. Automaton has 440980 states and 692903 transitions. Word has length 488 [2020-07-21 17:31:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:38,054 INFO L479 AbstractCegarLoop]: Abstraction has 440980 states and 692903 transitions. [2020-07-21 17:31:38,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:31:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 440980 states and 692903 transitions. [2020-07-21 17:31:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 17:31:38,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:38,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:31:38,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:38,701 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash -240582041, now seen corresponding path program 1 times [2020-07-21 17:31:38,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:38,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150202549] [2020-07-21 17:31:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:39,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:31:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2947 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:31:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:31:39,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:39,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150202549] [2020-07-21 17:31:39,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:39,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:31:39,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51055499] [2020-07-21 17:31:39,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:31:39,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:31:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:39,574 INFO L87 Difference]: Start difference. First operand 440980 states and 692903 transitions. Second operand 3 states. [2020-07-21 17:32:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:40,838 INFO L93 Difference]: Finished difference Result 1278147 states and 2003632 transitions. [2020-07-21 17:32:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:40,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 17:32:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:42,016 INFO L225 Difference]: With dead ends: 1278147 [2020-07-21 17:32:42,016 INFO L226 Difference]: Without dead ends: 867548 [2020-07-21 17:32:42,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867548 states. [2020-07-21 17:34:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867548 to 867460. [2020-07-21 17:34:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867460 states. [2020-07-21 17:34:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867460 states to 867460 states and 1355960 transitions. [2020-07-21 17:34:03,852 INFO L78 Accepts]: Start accepts. Automaton has 867460 states and 1355960 transitions. Word has length 489 [2020-07-21 17:34:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:03,852 INFO L479 AbstractCegarLoop]: Abstraction has 867460 states and 1355960 transitions. [2020-07-21 17:34:03,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:34:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 867460 states and 1355960 transitions. [2020-07-21 17:34:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 17:34:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:16,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:34:17,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:17,140 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1864427173, now seen corresponding path program 1 times [2020-07-21 17:34:17,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:17,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659166192] [2020-07-21 17:34:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:17,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:34:17,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:34:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:17,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:17,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659166192] [2020-07-21 17:34:17,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:17,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:34:17,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025632369] [2020-07-21 17:34:17,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:34:17,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:17,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:34:17,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:34:17,884 INFO L87 Difference]: Start difference. First operand 867460 states and 1355960 transitions. Second operand 4 states. [2020-07-21 17:35:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:35:27,999 INFO L93 Difference]: Finished difference Result 1215135 states and 1894464 transitions. [2020-07-21 17:35:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:35:27,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-21 17:35:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:35:29,532 INFO L225 Difference]: With dead ends: 1215135 [2020-07-21 17:35:29,532 INFO L226 Difference]: Without dead ends: 867109 [2020-07-21 17:35:29,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:35:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867109 states.