/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 DAGSIZE --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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:07:54,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:07:54,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:07:54,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:07:54,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:07:54,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:07:54,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:07:54,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:07:54,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:07:54,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:07:54,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:07:54,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:07:54,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:07:54,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:07:54,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:07:54,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:07:54,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:07:54,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:07:54,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:07:54,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:07:54,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:07:54,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:07:54,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:07:54,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:07:54,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 21:07:54,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 21:07:54,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 21:07:54,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 21:07:54,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 21:07:54,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 21:07:54,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:07:54,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:07:54,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:07:54,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:07:54,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:07:54,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:07:54,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:07:54,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:07:54,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:07:54,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:07:54,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:07:54,636 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 21:07:54,650 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:07:54,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:07:54,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:07:54,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:07:54,651 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:07:54,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:07:54,652 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:07:54,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:07:54,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:07:54,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:07:54,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:07:54,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:07:54,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:07:54,653 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:07:54,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:07:54,654 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:07:54,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:07:54,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:07:54,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:07:54,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:07:54,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:07:54,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:07:54,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:07:54,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:07:54,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:07:54,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:07:54,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:54,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:07:54,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:07:54,656 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 -> DAGSIZE 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 21:07:54,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:07:54,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:07:54,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:07:54,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:07:54,967 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:07:54,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 21:07:55,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401ffb0ef/c0a1e4040715447ca5a2a9e6afe38360/FLAG63f757834 [2020-07-21 21:07:55,774 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:07:55,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 21:07:55,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401ffb0ef/c0a1e4040715447ca5a2a9e6afe38360/FLAG63f757834 [2020-07-21 21:07:55,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401ffb0ef/c0a1e4040715447ca5a2a9e6afe38360 [2020-07-21 21:07:55,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:07:55,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:07:55,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:07:55,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:07:55,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:07:55,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:07:55" (1/1) ... [2020-07-21 21:07:55,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e09eb47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:55, skipping insertion in model container [2020-07-21 21:07:55,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:07:55" (1/1) ... [2020-07-21 21:07:55,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:07:56,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:07:57,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:07:57,737 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:07:59,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:07:59,087 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:07:59,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59 WrapperNode [2020-07-21 21:07:59,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:07:59,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:07:59,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:07:59,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:07:59,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (1/1) ... [2020-07-21 21:07:59,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:07:59,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:07:59,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:07:59,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:07:59,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (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 21:07:59,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:07:59,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:07:59,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:07:59,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:07:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:07:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:07:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:07:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:07:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:07:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:07:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:07:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:07:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:07:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:07:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:07:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:07:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 21:07:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:07:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:07:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:07:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:07:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:08:03,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:08:03,694 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:08:03,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:08:03 BoogieIcfgContainer [2020-07-21 21:08:03,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:08:03,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:08:03,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:08:03,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:08:03,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:07:55" (1/3) ... [2020-07-21 21:08:03,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1123d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:08:03, skipping insertion in model container [2020-07-21 21:08:03,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:59" (2/3) ... [2020-07-21 21:08:03,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1123d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:08:03, skipping insertion in model container [2020-07-21 21:08:03,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:08:03" (3/3) ... [2020-07-21 21:08:03,725 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 21:08:03,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:08:03,746 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 21:08:03,761 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 21:08:03,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:08:03,795 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:08:03,795 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:08:03,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:08:03,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:08:03,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:08:03,795 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:08:03,796 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:08:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-21 21:08:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 21:08:03,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:03,885 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 21:08:03,885 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-21 21:08:03,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:03,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521212270] [2020-07-21 21:08:03,902 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 21:08:04,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:04,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:08:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:05,129 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 21:08:05,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:05,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521212270] [2020-07-21 21:08:05,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:05,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:05,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638513405] [2020-07-21 21:08:05,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:05,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:05,155 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-21 21:08:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:05,722 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-21 21:08:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:08:05,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 21:08:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:05,771 INFO L225 Difference]: With dead ends: 4394 [2020-07-21 21:08:05,771 INFO L226 Difference]: Without dead ends: 2919 [2020-07-21 21:08:05,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 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 21:08:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-21 21:08:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-21 21:08:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-21 21:08:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-21 21:08:06,010 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-21 21:08:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:06,015 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-21 21:08:06,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-21 21:08:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 21:08:06,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:06,037 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 21:08:06,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:06,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-21 21:08:06,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:06,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409463301] [2020-07-21 21:08:06,254 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 21:08:06,693 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:06,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:08:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:07,122 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 21:08:07,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:07,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409463301] [2020-07-21 21:08:07,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:07,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:07,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95737334] [2020-07-21 21:08:07,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:07,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:07,128 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states. [2020-07-21 21:08:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:07,530 INFO L93 Difference]: Finished difference Result 8502 states and 14010 transitions. [2020-07-21 21:08:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:07,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 21:08:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:07,560 INFO L225 Difference]: With dead ends: 8502 [2020-07-21 21:08:07,560 INFO L226 Difference]: Without dead ends: 5655 [2020-07-21 21:08:07,568 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 21:08:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2020-07-21 21:08:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5612. [2020-07-21 21:08:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2020-07-21 21:08:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 9213 transitions. [2020-07-21 21:08:07,813 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 9213 transitions. Word has length 486 [2020-07-21 21:08:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:07,818 INFO L479 AbstractCegarLoop]: Abstraction has 5612 states and 9213 transitions. [2020-07-21 21:08:07,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 9213 transitions. [2020-07-21 21:08:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 21:08:07,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:07,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:08,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:08,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:08,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1313216099, now seen corresponding path program 1 times [2020-07-21 21:08:08,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:08,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792742899] [2020-07-21 21:08:08,059 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 21:08:08,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:08:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:08,926 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 21:08:08,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:08,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792742899] [2020-07-21 21:08:08,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:08,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:08,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212560659] [2020-07-21 21:08:08,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:08,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:08,930 INFO L87 Difference]: Start difference. First operand 5612 states and 9213 transitions. Second operand 4 states. [2020-07-21 21:08:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:09,550 INFO L93 Difference]: Finished difference Result 16660 states and 27346 transitions. [2020-07-21 21:08:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:09,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-21 21:08:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:09,604 INFO L225 Difference]: With dead ends: 16660 [2020-07-21 21:08:09,604 INFO L226 Difference]: Without dead ends: 11083 [2020-07-21 21:08:09,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 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 21:08:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11083 states. [2020-07-21 21:08:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11083 to 11051. [2020-07-21 21:08:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11051 states. [2020-07-21 21:08:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11051 states to 11051 states and 18067 transitions. [2020-07-21 21:08:10,107 INFO L78 Accepts]: Start accepts. Automaton has 11051 states and 18067 transitions. Word has length 490 [2020-07-21 21:08:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:10,108 INFO L479 AbstractCegarLoop]: Abstraction has 11051 states and 18067 transitions. [2020-07-21 21:08:10,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 11051 states and 18067 transitions. [2020-07-21 21:08:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 21:08:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:10,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:10,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:10,357 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -884254619, now seen corresponding path program 1 times [2020-07-21 21:08:10,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:10,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015856461] [2020-07-21 21:08:10,359 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 21:08:10,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:10,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:08:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:08:11,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:11,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015856461] [2020-07-21 21:08:11,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:11,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:08:11,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118756810] [2020-07-21 21:08:11,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:08:11,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:08:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:08:11,027 INFO L87 Difference]: Start difference. First operand 11051 states and 18067 transitions. Second operand 3 states. [2020-07-21 21:08:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:11,637 INFO L93 Difference]: Finished difference Result 33014 states and 53974 transitions. [2020-07-21 21:08:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:08:11,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 21:08:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:11,728 INFO L225 Difference]: With dead ends: 33014 [2020-07-21 21:08:11,728 INFO L226 Difference]: Without dead ends: 22029 [2020-07-21 21:08:11,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 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 21:08:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22029 states. [2020-07-21 21:08:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22029 to 11114. [2020-07-21 21:08:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11114 states. [2020-07-21 21:08:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 18151 transitions. [2020-07-21 21:08:13,182 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 18151 transitions. Word has length 493 [2020-07-21 21:08:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:13,182 INFO L479 AbstractCegarLoop]: Abstraction has 11114 states and 18151 transitions. [2020-07-21 21:08:13,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:08:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 18151 transitions. [2020-07-21 21:08:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 21:08:13,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:13,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:13,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:13,428 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2025404466, now seen corresponding path program 1 times [2020-07-21 21:08:13,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:13,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358969793] [2020-07-21 21:08:13,430 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 21:08:13,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:08:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:08:14,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:14,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358969793] [2020-07-21 21:08:14,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:14,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:08:14,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560146201] [2020-07-21 21:08:14,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:08:14,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:08:14,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:08:14,046 INFO L87 Difference]: Start difference. First operand 11114 states and 18151 transitions. Second operand 3 states. [2020-07-21 21:08:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:14,551 INFO L93 Difference]: Finished difference Result 21586 states and 34804 transitions. [2020-07-21 21:08:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:08:14,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 21:08:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:14,589 INFO L225 Difference]: With dead ends: 21586 [2020-07-21 21:08:14,589 INFO L226 Difference]: Without dead ends: 14870 [2020-07-21 21:08:14,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 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 21:08:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14870 states. [2020-07-21 21:08:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14870 to 12668. [2020-07-21 21:08:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12668 states. [2020-07-21 21:08:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12668 states to 12668 states and 20737 transitions. [2020-07-21 21:08:15,081 INFO L78 Accepts]: Start accepts. Automaton has 12668 states and 20737 transitions. Word has length 494 [2020-07-21 21:08:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:15,082 INFO L479 AbstractCegarLoop]: Abstraction has 12668 states and 20737 transitions. [2020-07-21 21:08:15,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:08:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 12668 states and 20737 transitions. [2020-07-21 21:08:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 21:08:15,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:15,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:15,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:15,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:15,323 INFO L82 PathProgramCache]: Analyzing trace with hash 972117723, now seen corresponding path program 1 times [2020-07-21 21:08:15,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:15,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821055075] [2020-07-21 21:08:15,324 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 21:08:15,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:08:15,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:15,956 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 21:08:15,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:15,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821055075] [2020-07-21 21:08:15,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:15,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:15,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744079713] [2020-07-21 21:08:15,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:15,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:15,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:15,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:15,961 INFO L87 Difference]: Start difference. First operand 12668 states and 20737 transitions. Second operand 4 states. [2020-07-21 21:08:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:16,908 INFO L93 Difference]: Finished difference Result 36552 states and 59649 transitions. [2020-07-21 21:08:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:16,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 21:08:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:16,984 INFO L225 Difference]: With dead ends: 36552 [2020-07-21 21:08:16,985 INFO L226 Difference]: Without dead ends: 25147 [2020-07-21 21:08:17,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:08:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25147 states. [2020-07-21 21:08:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25147 to 13958. [2020-07-21 21:08:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13958 states. [2020-07-21 21:08:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13958 states to 13958 states and 23075 transitions. [2020-07-21 21:08:17,898 INFO L78 Accepts]: Start accepts. Automaton has 13958 states and 23075 transitions. Word has length 496 [2020-07-21 21:08:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:17,898 INFO L479 AbstractCegarLoop]: Abstraction has 13958 states and 23075 transitions. [2020-07-21 21:08:17,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 13958 states and 23075 transitions. [2020-07-21 21:08:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 21:08:17,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:17,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:18,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:18,139 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1412904318, now seen corresponding path program 1 times [2020-07-21 21:08:18,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:18,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171965557] [2020-07-21 21:08:18,140 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 21:08:18,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:18,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:08:18,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:18,731 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 21:08:18,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:18,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171965557] [2020-07-21 21:08:18,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:18,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:18,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009167246] [2020-07-21 21:08:18,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:18,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:18,733 INFO L87 Difference]: Start difference. First operand 13958 states and 23075 transitions. Second operand 4 states. [2020-07-21 21:08:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:20,241 INFO L93 Difference]: Finished difference Result 40887 states and 67580 transitions. [2020-07-21 21:08:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:20,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 21:08:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:20,304 INFO L225 Difference]: With dead ends: 40887 [2020-07-21 21:08:20,305 INFO L226 Difference]: Without dead ends: 27070 [2020-07-21 21:08:20,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:08:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27070 states. [2020-07-21 21:08:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27070 to 27049. [2020-07-21 21:08:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27049 states. [2020-07-21 21:08:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27049 states to 27049 states and 44490 transitions. [2020-07-21 21:08:22,066 INFO L78 Accepts]: Start accepts. Automaton has 27049 states and 44490 transitions. Word has length 496 [2020-07-21 21:08:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:22,066 INFO L479 AbstractCegarLoop]: Abstraction has 27049 states and 44490 transitions. [2020-07-21 21:08:22,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 27049 states and 44490 transitions. [2020-07-21 21:08:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 21:08:22,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:22,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:22,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:22,299 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash -614996934, now seen corresponding path program 1 times [2020-07-21 21:08:22,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439485430] [2020-07-21 21:08:22,302 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 21:08:22,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:22,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:22,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:08:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:22,858 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 21:08:22,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:22,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439485430] [2020-07-21 21:08:22,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:22,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:22,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030380660] [2020-07-21 21:08:22,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:22,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:22,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:22,861 INFO L87 Difference]: Start difference. First operand 27049 states and 44490 transitions. Second operand 4 states. [2020-07-21 21:08:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:24,260 INFO L93 Difference]: Finished difference Result 75079 states and 122743 transitions. [2020-07-21 21:08:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:24,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 21:08:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:24,355 INFO L225 Difference]: With dead ends: 75079 [2020-07-21 21:08:24,355 INFO L226 Difference]: Without dead ends: 52415 [2020-07-21 21:08:24,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 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 21:08:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52415 states. [2020-07-21 21:08:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52415 to 31493. [2020-07-21 21:08:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31493 states. [2020-07-21 21:08:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31493 states to 31493 states and 52377 transitions. [2020-07-21 21:08:25,719 INFO L78 Accepts]: Start accepts. Automaton has 31493 states and 52377 transitions. Word has length 498 [2020-07-21 21:08:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:25,720 INFO L479 AbstractCegarLoop]: Abstraction has 31493 states and 52377 transitions. [2020-07-21 21:08:25,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 31493 states and 52377 transitions. [2020-07-21 21:08:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:08:25,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:25,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:25,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:25,949 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 616924603, now seen corresponding path program 1 times [2020-07-21 21:08:25,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:25,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138930186] [2020-07-21 21:08:25,951 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 21:08:26,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:08:26,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 3140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:08:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:26,919 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 21:08:26,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:26,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138930186] [2020-07-21 21:08:26,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:26,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:08:26,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424589064] [2020-07-21 21:08:26,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:08:26,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:08:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:08:26,926 INFO L87 Difference]: Start difference. First operand 31493 states and 52377 transitions. Second operand 9 states. [2020-07-21 21:08:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:43,575 INFO L93 Difference]: Finished difference Result 187666 states and 304423 transitions. [2020-07-21 21:08:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:08:43,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 499 [2020-07-21 21:08:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:43,850 INFO L225 Difference]: With dead ends: 187666 [2020-07-21 21:08:43,851 INFO L226 Difference]: Without dead ends: 182186 [2020-07-21 21:08:43,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:08:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182186 states. [2020-07-21 21:08:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182186 to 61028. [2020-07-21 21:08:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61028 states. [2020-07-21 21:08:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61028 states to 61028 states and 99535 transitions. [2020-07-21 21:08:48,693 INFO L78 Accepts]: Start accepts. Automaton has 61028 states and 99535 transitions. Word has length 499 [2020-07-21 21:08:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:48,694 INFO L479 AbstractCegarLoop]: Abstraction has 61028 states and 99535 transitions. [2020-07-21 21:08:48,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:08:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 61028 states and 99535 transitions. [2020-07-21 21:08:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:08:48,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:48,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:48,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:48,959 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1461998632, now seen corresponding path program 1 times [2020-07-21 21:08:48,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:48,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606975529] [2020-07-21 21:08:48,962 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 21:08:49,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:08:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 3136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:08:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:50,484 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 21:08:50,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:50,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606975529] [2020-07-21 21:08:50,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:50,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:08:50,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568941695] [2020-07-21 21:08:50,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:08:50,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:08:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:08:50,486 INFO L87 Difference]: Start difference. First operand 61028 states and 99535 transitions. Second operand 5 states. [2020-07-21 21:08:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:57,411 INFO L93 Difference]: Finished difference Result 124202 states and 201831 transitions. [2020-07-21 21:08:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:08:57,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-07-21 21:08:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:57,558 INFO L225 Difference]: With dead ends: 124202 [2020-07-21 21:08:57,558 INFO L226 Difference]: Without dead ends: 104499 [2020-07-21 21:08:57,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:08:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104499 states. [2020-07-21 21:09:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104499 to 104497. [2020-07-21 21:09:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104497 states. [2020-07-21 21:09:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104497 states to 104497 states and 168704 transitions. [2020-07-21 21:09:02,448 INFO L78 Accepts]: Start accepts. Automaton has 104497 states and 168704 transitions. Word has length 499 [2020-07-21 21:09:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:02,452 INFO L479 AbstractCegarLoop]: Abstraction has 104497 states and 168704 transitions. [2020-07-21 21:09:02,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:09:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 104497 states and 168704 transitions. [2020-07-21 21:09:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:09:02,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:02,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:09:02,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:02,733 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:02,734 INFO L82 PathProgramCache]: Analyzing trace with hash -399999507, now seen corresponding path program 1 times [2020-07-21 21:09:02,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:02,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855522238] [2020-07-21 21:09:02,735 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 21:09:05,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:05,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:05,239 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 21:09:05,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:05,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855522238] [2020-07-21 21:09:05,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:05,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:05,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271530059] [2020-07-21 21:09:05,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:05,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:05,242 INFO L87 Difference]: Start difference. First operand 104497 states and 168704 transitions. Second operand 3 states. [2020-07-21 21:09:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:14,213 INFO L93 Difference]: Finished difference Result 301803 states and 485466 transitions. [2020-07-21 21:09:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:14,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 21:09:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:14,465 INFO L225 Difference]: With dead ends: 301803 [2020-07-21 21:09:14,466 INFO L226 Difference]: Without dead ends: 203588 [2020-07-21 21:09:14,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203588 states. [2020-07-21 21:09:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203588 to 203512. [2020-07-21 21:09:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203512 states. [2020-07-21 21:09:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203512 states to 203512 states and 326888 transitions. [2020-07-21 21:09:27,306 INFO L78 Accepts]: Start accepts. Automaton has 203512 states and 326888 transitions. Word has length 499 [2020-07-21 21:09:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:27,307 INFO L479 AbstractCegarLoop]: Abstraction has 203512 states and 326888 transitions. [2020-07-21 21:09:27,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 203512 states and 326888 transitions. [2020-07-21 21:09:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 21:09:27,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:27,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:09:27,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:27,628 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 480595565, now seen corresponding path program 1 times [2020-07-21 21:09:27,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:27,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492747323] [2020-07-21 21:09:27,630 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 21:09:28,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:09:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:28,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:09:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:09:28,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:28,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492747323] [2020-07-21 21:09:28,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:28,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:09:28,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901024583] [2020-07-21 21:09:28,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:09:28,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:09:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:09:28,630 INFO L87 Difference]: Start difference. First operand 203512 states and 326888 transitions. Second operand 4 states. [2020-07-21 21:09:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:50,372 INFO L93 Difference]: Finished difference Result 580634 states and 929089 transitions. [2020-07-21 21:09:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:09:50,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-21 21:09:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:50,894 INFO L225 Difference]: With dead ends: 580634 [2020-07-21 21:09:50,895 INFO L226 Difference]: Without dead ends: 390750 [2020-07-21 21:09:51,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 498 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 21:09:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390750 states. [2020-07-21 21:10:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390750 to 214368. [2020-07-21 21:10:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214368 states. [2020-07-21 21:10:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214368 states to 214368 states and 345758 transitions. [2020-07-21 21:10:09,134 INFO L78 Accepts]: Start accepts. Automaton has 214368 states and 345758 transitions. Word has length 501 [2020-07-21 21:10:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:09,134 INFO L479 AbstractCegarLoop]: Abstraction has 214368 states and 345758 transitions. [2020-07-21 21:10:09,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:10:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 214368 states and 345758 transitions. [2020-07-21 21:10:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 21:10:09,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:09,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:10:09,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:09,481 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:09,482 INFO L82 PathProgramCache]: Analyzing trace with hash -716563829, now seen corresponding path program 1 times [2020-07-21 21:10:09,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:09,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086000272] [2020-07-21 21:10:09,483 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 21:10:09,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:10:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:10:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:10,515 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 21:10:10,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:10,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086000272] [2020-07-21 21:10:10,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:10,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:10:10,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132488326] [2020-07-21 21:10:10,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:10:10,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:10:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:10:10,521 INFO L87 Difference]: Start difference. First operand 214368 states and 345758 transitions. Second operand 9 states. [2020-07-21 21:12:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:12:39,613 INFO L93 Difference]: Finished difference Result 1900614 states and 3062841 transitions. [2020-07-21 21:12:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:12:39,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 501 [2020-07-21 21:12:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:12:42,597 INFO L225 Difference]: With dead ends: 1900614 [2020-07-21 21:12:42,598 INFO L226 Difference]: Without dead ends: 1835718 [2020-07-21 21:12:42,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:12:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835718 states. [2020-07-21 21:13:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835718 to 561473. [2020-07-21 21:13:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561473 states. [2020-07-21 21:13:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561473 states to 561473 states and 899975 transitions. [2020-07-21 21:13:55,002 INFO L78 Accepts]: Start accepts. Automaton has 561473 states and 899975 transitions. Word has length 501 [2020-07-21 21:13:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:55,003 INFO L479 AbstractCegarLoop]: Abstraction has 561473 states and 899975 transitions. [2020-07-21 21:13:55,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:13:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 561473 states and 899975 transitions. [2020-07-21 21:13:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 21:13:55,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:55,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:55,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:55,522 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1365603539, now seen corresponding path program 1 times [2020-07-21 21:13:55,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:55,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937944618] [2020-07-21 21:13:55,525 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 21:13:56,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:56,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 3145 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:13:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:57,337 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 21:13:57,657 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 21:13:57,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:57,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937944618] [2020-07-21 21:13:57,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:57,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:13:57,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747805336] [2020-07-21 21:13:57,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:13:57,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:57,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:13:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:13:57,659 INFO L87 Difference]: Start difference. First operand 561473 states and 899975 transitions. Second operand 8 states. [2020-07-21 21:15:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:15:13,974 INFO L93 Difference]: Finished difference Result 994456 states and 1598646 transitions. [2020-07-21 21:15:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:15:13,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 501 [2020-07-21 21:15:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:15:15,021 INFO L225 Difference]: With dead ends: 994456 [2020-07-21 21:15:15,021 INFO L226 Difference]: Without dead ends: 690575 [2020-07-21 21:15:15,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 21:15:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690575 states. [2020-07-21 21:15:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690575 to 272788. [2020-07-21 21:15:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272788 states. [2020-07-21 21:15:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272788 states to 272788 states and 433778 transitions. [2020-07-21 21:15:52,898 INFO L78 Accepts]: Start accepts. Automaton has 272788 states and 433778 transitions. Word has length 501 [2020-07-21 21:15:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:52,899 INFO L479 AbstractCegarLoop]: Abstraction has 272788 states and 433778 transitions. [2020-07-21 21:15:52,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:15:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 272788 states and 433778 transitions. [2020-07-21 21:15:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 21:15:53,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:53,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:15:53,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:53,277 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash 737623507, now seen corresponding path program 1 times [2020-07-21 21:15:53,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:53,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789390460] [2020-07-21 21:15:53,279 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 21:15:53,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:15:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:15:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:54,473 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 21:15:54,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:54,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789390460] [2020-07-21 21:15:54,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:54,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:15:54,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430432417] [2020-07-21 21:15:54,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:15:54,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:15:54,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:15:54,476 INFO L87 Difference]: Start difference. First operand 272788 states and 433778 transitions. Second operand 3 states. [2020-07-21 21:16:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:16:46,885 INFO L93 Difference]: Finished difference Result 783737 states and 1241129 transitions. [2020-07-21 21:16:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:16:46,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 21:16:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:16:47,539 INFO L225 Difference]: With dead ends: 783737 [2020-07-21 21:16:47,540 INFO L226 Difference]: Without dead ends: 527564 [2020-07-21 21:16:47,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:16:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527564 states. [2020-07-21 21:17:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527564 to 527268. [2020-07-21 21:17:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527268 states. [2020-07-21 21:17:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527268 states to 527268 states and 833947 transitions. [2020-07-21 21:17:42,680 INFO L78 Accepts]: Start accepts. Automaton has 527268 states and 833947 transitions. Word has length 501 [2020-07-21 21:17:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:17:42,680 INFO L479 AbstractCegarLoop]: Abstraction has 527268 states and 833947 transitions. [2020-07-21 21:17:42,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:17:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 527268 states and 833947 transitions. [2020-07-21 21:17:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 21:17:42,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:17:42,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:17:43,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:17:43,181 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:17:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:17:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2127980334, now seen corresponding path program 1 times [2020-07-21 21:17:43,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:17:43,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205554730] [2020-07-21 21:17:43,186 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 21:17:43,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:17:43,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:17:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 3153 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:17:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:17:43,953 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 21:17:43,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:17:43,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205554730] [2020-07-21 21:17:43,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:17:43,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:17:43,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491926211] [2020-07-21 21:17:43,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:17:43,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:17:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:17:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:17:43,955 INFO L87 Difference]: Start difference. First operand 527268 states and 833947 transitions. Second operand 9 states.