/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.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:05:18,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:05:18,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:05:18,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:05:18,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:05:18,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:05:18,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:05:18,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:05:18,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:05:18,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:05:18,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:05:18,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:05:18,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:05:18,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:05:18,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:05:18,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:05:18,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:05:18,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:05:18,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:05:18,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:05:18,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:05:18,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:05:18,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:05:18,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:05:18,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 21:05:18,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 21:05:18,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 21:05:18,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 21:05:18,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 21:05:18,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 21:05:18,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:05:18,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:05:18,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:05:18,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:05:18,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:05:18,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:05:18,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:05:18,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:05:18,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:05:18,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:05:18,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:05:18,373 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 21:05:18,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:05:18,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:05:18,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:05:18,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:05:18,389 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:05:18,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:05:18,389 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:05:18,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:05:18,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:05:18,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:05:18,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:05:18,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:05:18,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:05:18,390 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:05:18,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:05:18,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:05:18,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:05:18,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:05:18,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:05:18,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:05:18,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:05:18,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:05:18,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:05:18,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:05:18,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:05:18,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:05:18,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:18,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:05:18,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:05:18,393 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 21:05:18,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:05:18,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:05:18,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:05:18,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:05:18,686 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:05:18,686 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:05:18,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0458826e5/d76f73331f9b48fe8da34a4cac1d8336/FLAG5d1551301 [2020-07-21 21:05:19,452 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:05:19,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:05:19,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0458826e5/d76f73331f9b48fe8da34a4cac1d8336/FLAG5d1551301 [2020-07-21 21:05:19,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0458826e5/d76f73331f9b48fe8da34a4cac1d8336 [2020-07-21 21:05:19,631 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:05:19,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:05:19,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:19,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:05:19,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:05:19,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:19" (1/1) ... [2020-07-21 21:05:19,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139dbffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:19, skipping insertion in model container [2020-07-21 21:05:19,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:19" (1/1) ... [2020-07-21 21:05:19,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:05:19,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:05:21,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:21,160 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:05:22,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:22,175 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:05:22,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22 WrapperNode [2020-07-21 21:05:22,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:22,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:05:22,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:05:22,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:05:22,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (1/1) ... [2020-07-21 21:05:22,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:05:22,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:05:22,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:05:22,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:05:22,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (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 21:05:22,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:05:22,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:05:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:05:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:05:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:05:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:05:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:05:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:05:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:05:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:05:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:05:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:05:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:05:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:05:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:05:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:05:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:05:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:05:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:05:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:05:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:05:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:05:25,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:05:25,663 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:05:25,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:25 BoogieIcfgContainer [2020-07-21 21:05:25,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:05:25,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:05:25,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:05:25,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:05:25,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:05:19" (1/3) ... [2020-07-21 21:05:25,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c780587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:25, skipping insertion in model container [2020-07-21 21:05:25,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:22" (2/3) ... [2020-07-21 21:05:25,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c780587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:25, skipping insertion in model container [2020-07-21 21:05:25,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:25" (3/3) ... [2020-07-21 21:05:25,683 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:05:25,694 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:05:25,703 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-07-21 21:05:25,716 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-07-21 21:05:25,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:05:25,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:05:25,742 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:05:25,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:05:25,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:05:25,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:05:25,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:05:25,742 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:05:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states. [2020-07-21 21:05:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:25,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:25,819 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] [2020-07-21 21:05:25,820 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:25,826 INFO L82 PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times [2020-07-21 21:05:25,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:25,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738875243] [2020-07-21 21:05:25,837 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 21:05:26,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:26,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:26,682 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 21:05:26,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:26,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738875243] [2020-07-21 21:05:26,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:26,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:26,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721896008] [2020-07-21 21:05:26,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:26,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:26,709 INFO L87 Difference]: Start difference. First operand 1016 states. Second operand 4 states. [2020-07-21 21:05:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:27,066 INFO L93 Difference]: Finished difference Result 2995 states and 5363 transitions. [2020-07-21 21:05:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:05:27,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 21:05:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:27,096 INFO L225 Difference]: With dead ends: 2995 [2020-07-21 21:05:27,097 INFO L226 Difference]: Without dead ends: 1986 [2020-07-21 21:05:27,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 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 21:05:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2020-07-21 21:05:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1885. [2020-07-21 21:05:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-07-21 21:05:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2877 transitions. [2020-07-21 21:05:27,254 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2877 transitions. Word has length 324 [2020-07-21 21:05:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:27,255 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 2877 transitions. [2020-07-21 21:05:27,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2877 transitions. [2020-07-21 21:05:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:27,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:27,265 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] [2020-07-21 21:05:27,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:27,480 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash 475893007, now seen corresponding path program 1 times [2020-07-21 21:05:27,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:27,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909300846] [2020-07-21 21:05:27,483 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 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 21:05:27,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:27,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2207 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:28,225 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 21:05:28,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:28,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909300846] [2020-07-21 21:05:28,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:28,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:28,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569895774] [2020-07-21 21:05:28,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:28,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:28,231 INFO L87 Difference]: Start difference. First operand 1885 states and 2877 transitions. Second operand 3 states. [2020-07-21 21:05:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:28,502 INFO L93 Difference]: Finished difference Result 3331 states and 5128 transitions. [2020-07-21 21:05:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:28,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:28,519 INFO L225 Difference]: With dead ends: 3331 [2020-07-21 21:05:28,520 INFO L226 Difference]: Without dead ends: 2800 [2020-07-21 21:05:28,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2020-07-21 21:05:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2795. [2020-07-21 21:05:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2795 states. [2020-07-21 21:05:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 4285 transitions. [2020-07-21 21:05:28,634 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 4285 transitions. Word has length 326 [2020-07-21 21:05:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:28,636 INFO L479 AbstractCegarLoop]: Abstraction has 2795 states and 4285 transitions. [2020-07-21 21:05:28,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 4285 transitions. [2020-07-21 21:05:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:28,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:28,646 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] [2020-07-21 21:05:28,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:28,861 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash 434708526, now seen corresponding path program 1 times [2020-07-21 21:05:28,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:28,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827489896] [2020-07-21 21:05:28,864 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 21:05:29,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2207 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:29,484 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 21:05:29,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:29,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827489896] [2020-07-21 21:05:29,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:29,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:29,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098249568] [2020-07-21 21:05:29,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:29,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:29,488 INFO L87 Difference]: Start difference. First operand 2795 states and 4285 transitions. Second operand 3 states. [2020-07-21 21:05:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:29,827 INFO L93 Difference]: Finished difference Result 5446 states and 8444 transitions. [2020-07-21 21:05:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:29,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:29,851 INFO L225 Difference]: With dead ends: 5446 [2020-07-21 21:05:29,852 INFO L226 Difference]: Without dead ends: 4661 [2020-07-21 21:05:29,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2020-07-21 21:05:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 4653. [2020-07-21 21:05:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4653 states. [2020-07-21 21:05:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions. [2020-07-21 21:05:30,147 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 326 [2020-07-21 21:05:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:30,149 INFO L479 AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions. [2020-07-21 21:05:30,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions. [2020-07-21 21:05:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:30,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:30,172 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] [2020-07-21 21:05:30,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:30,386 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times [2020-07-21 21:05:30,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:30,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249722483] [2020-07-21 21:05:30,387 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 21:05:30,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:30,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:30,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:30,993 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 21:05:30,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:30,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249722483] [2020-07-21 21:05:30,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:30,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:30,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801855378] [2020-07-21 21:05:30,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:30,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:30,996 INFO L87 Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 3 states. [2020-07-21 21:05:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:31,381 INFO L93 Difference]: Finished difference Result 13649 states and 20959 transitions. [2020-07-21 21:05:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:31,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:31,430 INFO L225 Difference]: With dead ends: 13649 [2020-07-21 21:05:31,430 INFO L226 Difference]: Without dead ends: 9125 [2020-07-21 21:05:31,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2020-07-21 21:05:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001. [2020-07-21 21:05:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9001 states. [2020-07-21 21:05:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions. [2020-07-21 21:05:31,761 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326 [2020-07-21 21:05:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:31,762 INFO L479 AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions. [2020-07-21 21:05:31,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions. [2020-07-21 21:05:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:31,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:31,784 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] [2020-07-21 21:05:31,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:32,000 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times [2020-07-21 21:05:32,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:32,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901505333] [2020-07-21 21:05:32,001 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 21:05:32,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:32,461 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 21:05:32,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:32,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901505333] [2020-07-21 21:05:32,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:32,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:32,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685800159] [2020-07-21 21:05:32,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:32,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:32,465 INFO L87 Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 3 states. [2020-07-21 21:05:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:32,925 INFO L93 Difference]: Finished difference Result 26926 states and 41282 transitions. [2020-07-21 21:05:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:32,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:32,993 INFO L225 Difference]: With dead ends: 26926 [2020-07-21 21:05:32,993 INFO L226 Difference]: Without dead ends: 17964 [2020-07-21 21:05:33,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17964 states. [2020-07-21 21:05:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17964 to 9015. [2020-07-21 21:05:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9015 states. [2020-07-21 21:05:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 13821 transitions. [2020-07-21 21:05:33,428 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 13821 transitions. Word has length 326 [2020-07-21 21:05:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:33,428 INFO L479 AbstractCegarLoop]: Abstraction has 9015 states and 13821 transitions. [2020-07-21 21:05:33,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 13821 transitions. [2020-07-21 21:05:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 21:05:33,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:33,449 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] [2020-07-21 21:05:33,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:33,663 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1384773422, now seen corresponding path program 1 times [2020-07-21 21:05:33,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:33,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028227914] [2020-07-21 21:05:33,664 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 21:05:34,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:34,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:34,172 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 21:05:34,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:34,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028227914] [2020-07-21 21:05:34,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:34,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:34,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121993685] [2020-07-21 21:05:34,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:34,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:34,181 INFO L87 Difference]: Start difference. First operand 9015 states and 13821 transitions. Second operand 3 states. [2020-07-21 21:05:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:34,612 INFO L93 Difference]: Finished difference Result 26948 states and 41312 transitions. [2020-07-21 21:05:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:34,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 21:05:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:34,654 INFO L225 Difference]: With dead ends: 26948 [2020-07-21 21:05:34,654 INFO L226 Difference]: Without dead ends: 17987 [2020-07-21 21:05:34,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 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 21:05:34,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17987 states. [2020-07-21 21:05:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17987 to 9038. [2020-07-21 21:05:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9038 states. [2020-07-21 21:05:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 13853 transitions. [2020-07-21 21:05:35,234 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 13853 transitions. Word has length 327 [2020-07-21 21:05:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:35,235 INFO L479 AbstractCegarLoop]: Abstraction has 9038 states and 13853 transitions. [2020-07-21 21:05:35,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 13853 transitions. [2020-07-21 21:05:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:05:35,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:35,253 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] [2020-07-21 21:05:35,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:35,469 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 588846425, now seen corresponding path program 1 times [2020-07-21 21:05:35,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:35,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325414750] [2020-07-21 21:05:35,472 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 21:05:35,800 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:35,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:35,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:35,935 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 21:05:35,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:35,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325414750] [2020-07-21 21:05:35,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:35,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:35,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133332032] [2020-07-21 21:05:35,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:35,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:35,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:35,938 INFO L87 Difference]: Start difference. First operand 9038 states and 13853 transitions. Second operand 4 states. [2020-07-21 21:05:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:36,366 INFO L93 Difference]: Finished difference Result 18859 states and 28858 transitions. [2020-07-21 21:05:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:36,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 21:05:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:36,396 INFO L225 Difference]: With dead ends: 18859 [2020-07-21 21:05:36,396 INFO L226 Difference]: Without dead ends: 9613 [2020-07-21 21:05:36,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 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 21:05:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9613 states. [2020-07-21 21:05:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9613 to 9489. [2020-07-21 21:05:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9489 states. [2020-07-21 21:05:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9489 states to 9489 states and 14482 transitions. [2020-07-21 21:05:37,429 INFO L78 Accepts]: Start accepts. Automaton has 9489 states and 14482 transitions. Word has length 328 [2020-07-21 21:05:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:37,429 INFO L479 AbstractCegarLoop]: Abstraction has 9489 states and 14482 transitions. [2020-07-21 21:05:37,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9489 states and 14482 transitions. [2020-07-21 21:05:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:37,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:37,448 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] [2020-07-21 21:05:37,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:37,662 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1703885917, now seen corresponding path program 1 times [2020-07-21 21:05:37,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:37,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094741093] [2020-07-21 21:05:37,664 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 21:05:37,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:37,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:38,037 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 21:05:38,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:38,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094741093] [2020-07-21 21:05:38,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:38,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:38,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752312604] [2020-07-21 21:05:38,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:38,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:38,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:38,039 INFO L87 Difference]: Start difference. First operand 9489 states and 14482 transitions. Second operand 3 states. [2020-07-21 21:05:38,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:38,553 INFO L93 Difference]: Finished difference Result 27887 states and 42467 transitions. [2020-07-21 21:05:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:38,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:38,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:38,598 INFO L225 Difference]: With dead ends: 27887 [2020-07-21 21:05:38,598 INFO L226 Difference]: Without dead ends: 18697 [2020-07-21 21:05:38,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 21:05:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18697 states. [2020-07-21 21:05:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18697 to 9519. [2020-07-21 21:05:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9519 states. [2020-07-21 21:05:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9519 states to 9519 states and 14517 transitions. [2020-07-21 21:05:39,168 INFO L78 Accepts]: Start accepts. Automaton has 9519 states and 14517 transitions. Word has length 330 [2020-07-21 21:05:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:39,168 INFO L479 AbstractCegarLoop]: Abstraction has 9519 states and 14517 transitions. [2020-07-21 21:05:39,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9519 states and 14517 transitions. [2020-07-21 21:05:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:39,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:39,185 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] [2020-07-21 21:05:39,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:39,400 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1406710539, now seen corresponding path program 1 times [2020-07-21 21:05:39,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:39,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168817553] [2020-07-21 21:05:39,403 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 21:05:39,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2215 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:39,966 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 21:05:39,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:39,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168817553] [2020-07-21 21:05:39,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:39,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:39,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333395247] [2020-07-21 21:05:39,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:39,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:39,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:39,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:39,969 INFO L87 Difference]: Start difference. First operand 9519 states and 14517 transitions. Second operand 3 states. [2020-07-21 21:05:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:40,491 INFO L93 Difference]: Finished difference Result 26711 states and 40615 transitions. [2020-07-21 21:05:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:40,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:40,512 INFO L225 Difference]: With dead ends: 26711 [2020-07-21 21:05:40,512 INFO L226 Difference]: Without dead ends: 17619 [2020-07-21 21:05:40,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 21:05:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17619 states. [2020-07-21 21:05:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17619 to 17495. [2020-07-21 21:05:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17495 states. [2020-07-21 21:05:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 26518 transitions. [2020-07-21 21:05:41,050 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 26518 transitions. Word has length 330 [2020-07-21 21:05:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:41,051 INFO L479 AbstractCegarLoop]: Abstraction has 17495 states and 26518 transitions. [2020-07-21 21:05:41,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 26518 transitions. [2020-07-21 21:05:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:41,070 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] [2020-07-21 21:05:41,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:41,271 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1502657294, now seen corresponding path program 1 times [2020-07-21 21:05:41,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:41,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103871884] [2020-07-21 21:05:41,273 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 21:05:41,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:41,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:05:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:41,675 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 21:05:41,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:41,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103871884] [2020-07-21 21:05:41,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:41,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:41,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149324175] [2020-07-21 21:05:41,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:41,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:41,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:41,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:41,677 INFO L87 Difference]: Start difference. First operand 17495 states and 26518 transitions. Second operand 4 states. [2020-07-21 21:05:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:42,911 INFO L93 Difference]: Finished difference Result 49814 states and 75279 transitions. [2020-07-21 21:05:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:42,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 21:05:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:42,949 INFO L225 Difference]: With dead ends: 49814 [2020-07-21 21:05:42,949 INFO L226 Difference]: Without dead ends: 33140 [2020-07-21 21:05:42,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 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 21:05:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33140 states. [2020-07-21 21:05:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33140 to 17767. [2020-07-21 21:05:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17767 states. [2020-07-21 21:05:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17767 states to 17767 states and 26948 transitions. [2020-07-21 21:05:43,783 INFO L78 Accepts]: Start accepts. Automaton has 17767 states and 26948 transitions. Word has length 330 [2020-07-21 21:05:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:43,783 INFO L479 AbstractCegarLoop]: Abstraction has 17767 states and 26948 transitions. [2020-07-21 21:05:43,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 17767 states and 26948 transitions. [2020-07-21 21:05:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:43,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:43,801 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] [2020-07-21 21:05:44,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:44,002 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2005785361, now seen corresponding path program 1 times [2020-07-21 21:05:44,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:44,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959061559] [2020-07-21 21:05:44,004 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 21:05:44,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:44,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:05:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:44,477 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 21:05:44,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:44,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959061559] [2020-07-21 21:05:44,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:44,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:05:44,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715682886] [2020-07-21 21:05:44,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:05:44,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:44,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:05:44,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:05:44,479 INFO L87 Difference]: Start difference. First operand 17767 states and 26948 transitions. Second operand 9 states. [2020-07-21 21:05:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:55,655 INFO L93 Difference]: Finished difference Result 114203 states and 177150 transitions. [2020-07-21 21:05:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:05:55,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 330 [2020-07-21 21:05:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:55,798 INFO L225 Difference]: With dead ends: 114203 [2020-07-21 21:05:55,798 INFO L226 Difference]: Without dead ends: 109821 [2020-07-21 21:05:55,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:05:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109821 states. [2020-07-21 21:05:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109821 to 48215. [2020-07-21 21:05:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48215 states. [2020-07-21 21:05:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48215 states to 48215 states and 73655 transitions. [2020-07-21 21:05:59,630 INFO L78 Accepts]: Start accepts. Automaton has 48215 states and 73655 transitions. Word has length 330 [2020-07-21 21:05:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:59,630 INFO L479 AbstractCegarLoop]: Abstraction has 48215 states and 73655 transitions. [2020-07-21 21:05:59,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:05:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 48215 states and 73655 transitions. [2020-07-21 21:05:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:59,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:59,659 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] [2020-07-21 21:05:59,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:59,860 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1559994321, now seen corresponding path program 1 times [2020-07-21 21:05:59,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:59,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933967603] [2020-07-21 21:05:59,863 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 21:06:00,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:00,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:00,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:06:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:00,685 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 21:06:00,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:00,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933967603] [2020-07-21 21:06:00,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:00,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:06:00,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461743524] [2020-07-21 21:06:00,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:06:00,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:06:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:06:00,689 INFO L87 Difference]: Start difference. First operand 48215 states and 73655 transitions. Second operand 8 states. [2020-07-21 21:06:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:06,305 INFO L93 Difference]: Finished difference Result 78126 states and 120335 transitions. [2020-07-21 21:06:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:06:06,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2020-07-21 21:06:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:06,370 INFO L225 Difference]: With dead ends: 78126 [2020-07-21 21:06:06,370 INFO L226 Difference]: Without dead ends: 52188 [2020-07-21 21:06:06,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 21:06:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52188 states. [2020-07-21 21:06:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52188 to 24369. [2020-07-21 21:06:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24369 states. [2020-07-21 21:06:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24369 states to 24369 states and 36642 transitions. [2020-07-21 21:06:07,903 INFO L78 Accepts]: Start accepts. Automaton has 24369 states and 36642 transitions. Word has length 330 [2020-07-21 21:06:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:07,904 INFO L479 AbstractCegarLoop]: Abstraction has 24369 states and 36642 transitions. [2020-07-21 21:06:07,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:06:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 24369 states and 36642 transitions. [2020-07-21 21:06:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:06:07,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:07,926 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] [2020-07-21 21:06:08,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:08,134 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:08,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1117202544, now seen corresponding path program 1 times [2020-07-21 21:06:08,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:08,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934739543] [2020-07-21 21:06:08,136 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 21:06:08,596 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:08,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:08,675 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 21:06:08,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:08,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934739543] [2020-07-21 21:06:08,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:08,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:08,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769270727] [2020-07-21 21:06:08,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:08,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:08,677 INFO L87 Difference]: Start difference. First operand 24369 states and 36642 transitions. Second operand 3 states. [2020-07-21 21:06:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:10,863 INFO L93 Difference]: Finished difference Result 54409 states and 81961 transitions. [2020-07-21 21:06:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:10,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:06:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:10,900 INFO L225 Difference]: With dead ends: 54409 [2020-07-21 21:06:10,900 INFO L226 Difference]: Without dead ends: 32627 [2020-07-21 21:06:10,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 21:06:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32627 states. [2020-07-21 21:06:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32627 to 27535. [2020-07-21 21:06:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27535 states. [2020-07-21 21:06:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27535 states to 27535 states and 41637 transitions. [2020-07-21 21:06:12,486 INFO L78 Accepts]: Start accepts. Automaton has 27535 states and 41637 transitions. Word has length 330 [2020-07-21 21:06:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:12,486 INFO L479 AbstractCegarLoop]: Abstraction has 27535 states and 41637 transitions. [2020-07-21 21:06:12,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 27535 states and 41637 transitions. [2020-07-21 21:06:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:06:12,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:12,507 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] [2020-07-21 21:06:12,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:12,722 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:12,723 INFO L82 PathProgramCache]: Analyzing trace with hash 488749142, now seen corresponding path program 1 times [2020-07-21 21:06:12,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:12,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000254266] [2020-07-21 21:06:12,724 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 21:06:13,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:13,276 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 21:06:13,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:13,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000254266] [2020-07-21 21:06:13,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:13,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:13,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563336724] [2020-07-21 21:06:13,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:13,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:13,278 INFO L87 Difference]: Start difference. First operand 27535 states and 41637 transitions. Second operand 3 states. [2020-07-21 21:06:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:15,728 INFO L93 Difference]: Finished difference Result 67678 states and 102921 transitions. [2020-07-21 21:06:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:15,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:06:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:15,773 INFO L225 Difference]: With dead ends: 67678 [2020-07-21 21:06:15,773 INFO L226 Difference]: Without dead ends: 43162 [2020-07-21 21:06:15,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 21:06:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43162 states. [2020-07-21 21:06:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43162 to 36947. [2020-07-21 21:06:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36947 states. [2020-07-21 21:06:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36947 states to 36947 states and 56547 transitions. [2020-07-21 21:06:17,802 INFO L78 Accepts]: Start accepts. Automaton has 36947 states and 56547 transitions. Word has length 332 [2020-07-21 21:06:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:17,803 INFO L479 AbstractCegarLoop]: Abstraction has 36947 states and 56547 transitions. [2020-07-21 21:06:17,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 36947 states and 56547 transitions. [2020-07-21 21:06:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:06:17,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:17,823 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] [2020-07-21 21:06:18,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:18,032 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash -921502141, now seen corresponding path program 1 times [2020-07-21 21:06:18,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:18,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153792298] [2020-07-21 21:06:18,037 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 21:06:18,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:18,598 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 21:06:18,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:18,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153792298] [2020-07-21 21:06:18,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:18,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:18,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34981190] [2020-07-21 21:06:18,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:18,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:18,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:18,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:18,600 INFO L87 Difference]: Start difference. First operand 36947 states and 56547 transitions. Second operand 3 states. [2020-07-21 21:06:23,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:23,404 INFO L93 Difference]: Finished difference Result 108623 states and 165941 transitions. [2020-07-21 21:06:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:23,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:06:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:23,503 INFO L225 Difference]: With dead ends: 108623 [2020-07-21 21:06:23,503 INFO L226 Difference]: Without dead ends: 72795 [2020-07-21 21:06:23,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 21:06:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72795 states. [2020-07-21 21:06:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72795 to 37073. [2020-07-21 21:06:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37073 states. [2020-07-21 21:06:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37073 states to 37073 states and 56711 transitions. [2020-07-21 21:06:26,016 INFO L78 Accepts]: Start accepts. Automaton has 37073 states and 56711 transitions. Word has length 332 [2020-07-21 21:06:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:26,016 INFO L479 AbstractCegarLoop]: Abstraction has 37073 states and 56711 transitions. [2020-07-21 21:06:26,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 37073 states and 56711 transitions. [2020-07-21 21:06:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 21:06:26,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:26,034 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] [2020-07-21 21:06:26,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:26,235 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1129468009, now seen corresponding path program 1 times [2020-07-21 21:06:26,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:26,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115312883] [2020-07-21 21:06:26,238 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 21:06:26,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:26,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:26,633 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 21:06:26,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:26,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115312883] [2020-07-21 21:06:26,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:26,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:26,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656429593] [2020-07-21 21:06:26,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:26,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:26,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:26,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:26,638 INFO L87 Difference]: Start difference. First operand 37073 states and 56711 transitions. Second operand 3 states. [2020-07-21 21:06:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:30,891 INFO L93 Difference]: Finished difference Result 108647 states and 165925 transitions. [2020-07-21 21:06:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:30,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 21:06:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:30,994 INFO L225 Difference]: With dead ends: 108647 [2020-07-21 21:06:30,994 INFO L226 Difference]: Without dead ends: 72789 [2020-07-21 21:06:31,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 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 21:06:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72789 states. [2020-07-21 21:06:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72789 to 37215. [2020-07-21 21:06:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37215 states. [2020-07-21 21:06:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37215 states to 37215 states and 56880 transitions. [2020-07-21 21:06:33,662 INFO L78 Accepts]: Start accepts. Automaton has 37215 states and 56880 transitions. Word has length 333 [2020-07-21 21:06:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:33,662 INFO L479 AbstractCegarLoop]: Abstraction has 37215 states and 56880 transitions. [2020-07-21 21:06:33,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 37215 states and 56880 transitions. [2020-07-21 21:06:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 21:06:33,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:33,678 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] [2020-07-21 21:06:33,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:33,886 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash -271563843, now seen corresponding path program 1 times [2020-07-21 21:06:33,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:33,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437361538] [2020-07-21 21:06:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:34,350 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:34,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:34,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:06:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:06:35,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:35,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437361538] [2020-07-21 21:06:35,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:35,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:06:35,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519710820] [2020-07-21 21:06:35,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:06:35,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:06:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:06:35,690 INFO L87 Difference]: Start difference. First operand 37215 states and 56880 transitions. Second operand 5 states. [2020-07-21 21:06:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:41,209 INFO L93 Difference]: Finished difference Result 91493 states and 141469 transitions. [2020-07-21 21:06:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:06:41,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-21 21:06:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:41,303 INFO L225 Difference]: With dead ends: 91493 [2020-07-21 21:06:41,303 INFO L226 Difference]: Without dead ends: 70363 [2020-07-21 21:06:41,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 329 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 21:06:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70363 states. [2020-07-21 21:06:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70363 to 70269. [2020-07-21 21:06:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70269 states. [2020-07-21 21:06:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70269 states to 70269 states and 107470 transitions. [2020-07-21 21:06:46,123 INFO L78 Accepts]: Start accepts. Automaton has 70269 states and 107470 transitions. Word has length 333 [2020-07-21 21:06:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:46,124 INFO L479 AbstractCegarLoop]: Abstraction has 70269 states and 107470 transitions. [2020-07-21 21:06:46,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:06:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 70269 states and 107470 transitions. [2020-07-21 21:06:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 21:06:46,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:46,152 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] [2020-07-21 21:06:46,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:46,352 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1184289703, now seen corresponding path program 1 times [2020-07-21 21:06:46,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:46,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983423419] [2020-07-21 21:06:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:46,812 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:06:46,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:46,898 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 21:06:46,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:46,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983423419] [2020-07-21 21:06:46,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:46,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:46,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364456871] [2020-07-21 21:06:46,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:46,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:46,900 INFO L87 Difference]: Start difference. First operand 70269 states and 107470 transitions. Second operand 3 states. [2020-07-21 21:06:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:56,707 INFO L93 Difference]: Finished difference Result 173106 states and 268322 transitions. [2020-07-21 21:06:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:56,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 21:06:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:56,860 INFO L225 Difference]: With dead ends: 173106 [2020-07-21 21:06:56,861 INFO L226 Difference]: Without dead ends: 131860 [2020-07-21 21:06:56,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 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 21:06:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131860 states. [2020-07-21 21:07:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131860 to 131858. [2020-07-21 21:07:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131858 states. [2020-07-21 21:07:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131858 states to 131858 states and 202139 transitions. [2020-07-21 21:07:08,556 INFO L78 Accepts]: Start accepts. Automaton has 131858 states and 202139 transitions. Word has length 333 [2020-07-21 21:07:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:08,556 INFO L479 AbstractCegarLoop]: Abstraction has 131858 states and 202139 transitions. [2020-07-21 21:07:08,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:07:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 131858 states and 202139 transitions. [2020-07-21 21:07:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 21:07:08,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:08,604 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] [2020-07-21 21:07:08,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:08,805 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash 72101730, now seen corresponding path program 1 times [2020-07-21 21:07:08,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:08,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260083470] [2020-07-21 21:07:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:09,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:07:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:09,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:07:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:09,380 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 21:07:09,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:09,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260083470] [2020-07-21 21:07:09,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:09,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:09,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483831657] [2020-07-21 21:07:09,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:09,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:09,383 INFO L87 Difference]: Start difference. First operand 131858 states and 202139 transitions. Second operand 4 states. [2020-07-21 21:07:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:30,279 INFO L93 Difference]: Finished difference Result 389216 states and 596915 transitions. [2020-07-21 21:07:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:07:30,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 21:07:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:30,692 INFO L225 Difference]: With dead ends: 389216 [2020-07-21 21:07:30,692 INFO L226 Difference]: Without dead ends: 257643 [2020-07-21 21:07:30,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 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 21:07:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257643 states. [2020-07-21 21:07:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257643 to 257519. [2020-07-21 21:07:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257519 states. [2020-07-21 21:07:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257519 states to 257519 states and 393273 transitions. [2020-07-21 21:07:54,328 INFO L78 Accepts]: Start accepts. Automaton has 257519 states and 393273 transitions. Word has length 333 [2020-07-21 21:07:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:54,328 INFO L479 AbstractCegarLoop]: Abstraction has 257519 states and 393273 transitions. [2020-07-21 21:07:54,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:07:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 257519 states and 393273 transitions. [2020-07-21 21:07:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:07:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:54,442 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] [2020-07-21 21:07:54,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:54,642 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1862331282, now seen corresponding path program 1 times [2020-07-21 21:07:54,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:54,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903720821] [2020-07-21 21:07:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:54,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:54,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:07:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:55,059 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 21:07:55,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:55,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903720821] [2020-07-21 21:07:55,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:55,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:07:55,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558675028] [2020-07-21 21:07:55,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:07:55,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:07:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:07:55,061 INFO L87 Difference]: Start difference. First operand 257519 states and 393273 transitions. Second operand 3 states. [2020-07-21 21:08:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:41,574 INFO L93 Difference]: Finished difference Result 771844 states and 1178639 transitions. [2020-07-21 21:08:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:08:41,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 21:08:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:42,614 INFO L225 Difference]: With dead ends: 771844 [2020-07-21 21:08:42,615 INFO L226 Difference]: Without dead ends: 514665 [2020-07-21 21:08:42,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 21:08:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514665 states. [2020-07-21 21:09:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514665 to 257629. [2020-07-21 21:09:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257629 states. [2020-07-21 21:09:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257629 states to 257629 states and 393416 transitions. [2020-07-21 21:09:05,104 INFO L78 Accepts]: Start accepts. Automaton has 257629 states and 393416 transitions. Word has length 335 [2020-07-21 21:09:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:05,104 INFO L479 AbstractCegarLoop]: Abstraction has 257629 states and 393416 transitions. [2020-07-21 21:09:05,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 257629 states and 393416 transitions. [2020-07-21 21:09:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:09:05,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:05,221 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] [2020-07-21 21:09:09,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:09,685 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash -243097289, now seen corresponding path program 1 times [2020-07-21 21:09:09,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:09,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820455648] [2020-07-21 21:09:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:10,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:10,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:09:10,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:10,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820455648] [2020-07-21 21:09:10,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:10,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:10,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601681801] [2020-07-21 21:09:10,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:10,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:10,288 INFO L87 Difference]: Start difference. First operand 257629 states and 393416 transitions. Second operand 3 states. [2020-07-21 21:09:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:55,149 INFO L93 Difference]: Finished difference Result 760412 states and 1160844 transitions. [2020-07-21 21:09:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:55,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 21:09:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:55,910 INFO L225 Difference]: With dead ends: 760412 [2020-07-21 21:09:55,911 INFO L226 Difference]: Without dead ends: 503998 [2020-07-21 21:09:56,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 21:09:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503998 states. [2020-07-21 21:10:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503998 to 503874. [2020-07-21 21:10:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503874 states. [2020-07-21 21:10:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503874 states to 503874 states and 765628 transitions. [2020-07-21 21:10:51,809 INFO L78 Accepts]: Start accepts. Automaton has 503874 states and 765628 transitions. Word has length 335 [2020-07-21 21:10:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:51,810 INFO L479 AbstractCegarLoop]: Abstraction has 503874 states and 765628 transitions. [2020-07-21 21:10:51,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:10:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 503874 states and 765628 transitions. [2020-07-21 21:10:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:10:52,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:52,064 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] [2020-07-21 21:10:52,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:52,265 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1668311991, now seen corresponding path program 1 times [2020-07-21 21:10:52,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:52,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939246170] [2020-07-21 21:10:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:52,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:10:52,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:10:52,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:52,673 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 21:10:52,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:52,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939246170] [2020-07-21 21:10:52,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:52,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:10:52,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341645445] [2020-07-21 21:10:52,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:10:52,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:52,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:10:52,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:52,676 INFO L87 Difference]: Start difference. First operand 503874 states and 765628 transitions. Second operand 3 states. [2020-07-21 21:12:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:12:33,324 INFO L93 Difference]: Finished difference Result 1510315 states and 2294791 transitions. [2020-07-21 21:12:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:12:33,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 21:12:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:12:35,349 INFO L225 Difference]: With dead ends: 1510315 [2020-07-21 21:12:35,350 INFO L226 Difference]: Without dead ends: 1007155 [2020-07-21 21:12:35,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 21:12:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007155 states. [2020-07-21 21:13:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007155 to 504127. [2020-07-21 21:13:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504127 states. [2020-07-21 21:13:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504127 states to 504127 states and 765980 transitions. [2020-07-21 21:13:34,549 INFO L78 Accepts]: Start accepts. Automaton has 504127 states and 765980 transitions. Word has length 336 [2020-07-21 21:13:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:34,550 INFO L479 AbstractCegarLoop]: Abstraction has 504127 states and 765980 transitions. [2020-07-21 21:13:34,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 504127 states and 765980 transitions. [2020-07-21 21:13:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 21:13:34,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:34,762 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] [2020-07-21 21:13:34,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:34,963 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1664504132, now seen corresponding path program 1 times [2020-07-21 21:13:34,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:34,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405570545] [2020-07-21 21:13:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:35,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:35,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:35,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:13:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:35,377 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 21:13:35,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405570545] [2020-07-21 21:13:35,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:35,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:35,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474550556] [2020-07-21 21:13:35,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:35,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:35,379 INFO L87 Difference]: Start difference. First operand 504127 states and 765980 transitions. Second operand 4 states. [2020-07-21 21:14:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:32,651 INFO L93 Difference]: Finished difference Result 1019347 states and 1547783 transitions. [2020-07-21 21:14:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:14:32,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 21:14:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:33,792 INFO L225 Difference]: With dead ends: 1019347 [2020-07-21 21:14:33,793 INFO L226 Difference]: Without dead ends: 510479 [2020-07-21 21:14:34,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 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 21:14:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510479 states. [2020-07-21 21:15:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510479 to 510355. [2020-07-21 21:15:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510355 states. [2020-07-21 21:15:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510355 states to 510355 states and 771329 transitions. [2020-07-21 21:15:32,521 INFO L78 Accepts]: Start accepts. Automaton has 510355 states and 771329 transitions. Word has length 337 [2020-07-21 21:15:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:32,521 INFO L479 AbstractCegarLoop]: Abstraction has 510355 states and 771329 transitions. [2020-07-21 21:15:32,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:15:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 510355 states and 771329 transitions. [2020-07-21 21:15:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 21:15:32,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:32,750 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] [2020-07-21 21:15:32,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:32,951 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1150867013, now seen corresponding path program 1 times [2020-07-21 21:15:32,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:32,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300225180] [2020-07-21 21:15:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:33,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:15:33,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2247 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:15:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:33,671 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 21:15:33,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:33,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300225180] [2020-07-21 21:15:33,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:33,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:15:33,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730575934] [2020-07-21 21:15:33,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:15:33,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:33,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:15:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:15:33,673 INFO L87 Difference]: Start difference. First operand 510355 states and 771329 transitions. Second operand 8 states.