/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:32:28,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:32:28,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:32:28,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:32:28,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:32:28,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:32:28,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:32:28,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:32:28,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:32:28,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:32:28,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:32:28,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:32:28,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:32:28,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:32:28,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:32:28,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:32:28,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:32:28,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:32:28,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:32:28,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:32:28,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:32:28,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:32:28,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:32:28,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:32:28,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:32:28,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:32:28,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:32:28,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:32:28,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:32:28,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:32:28,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:32:28,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:32:28,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:32:28,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:32:28,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:32:28,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:32:28,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:32:28,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:32:28,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:32:28,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:32:28,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:32:28,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:32:28,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:32:28,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:32:28,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:32:28,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:32:28,781 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:32:28,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:32:28,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:32:28,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:32:28,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:32:28,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:32:28,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:32:28,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:32:28,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:32:28,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:32:28,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:32:28,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:32:28,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:32:28,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:32:28,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:32:28,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:32:28,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:32:28,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:32:28,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:32:28,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:32:28,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:32:28,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:32:28,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:28,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:32:28,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:32:28,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:32:29,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:32:29,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:32:29,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:32:29,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:32:29,106 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:32:29,107 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 17:32:29,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa2a37e4/bfd9bff8ff794cca9227b95c52d0a086/FLAGc9e028e2c [2020-07-21 17:32:29,922 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:32:29,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 17:32:29,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa2a37e4/bfd9bff8ff794cca9227b95c52d0a086/FLAGc9e028e2c [2020-07-21 17:32:30,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa2a37e4/bfd9bff8ff794cca9227b95c52d0a086 [2020-07-21 17:32:30,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:32:30,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:32:30,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:32:30,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:32:30,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:32:30,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:32:30" (1/1) ... [2020-07-21 17:32:30,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ebb4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:30, skipping insertion in model container [2020-07-21 17:32:30,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:32:30" (1/1) ... [2020-07-21 17:32:30,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:32:30,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:32:32,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:32:32,216 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:32:34,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:32:34,236 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:32:34,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34 WrapperNode [2020-07-21 17:32:34,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:32:34,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:32:34,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:32:34,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:32:34,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... [2020-07-21 17:32:34,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:32:34,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:32:34,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:32:34,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:32:34,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:32:34,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:32:34,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:32:34,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:32:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:32:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:32:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:32:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:32:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:32:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:32:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:32:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:32:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:32:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:32:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:32:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:32:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:32:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 17:32:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:32:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:32:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:32:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:32:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:32:39,409 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:32:39,409 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:32:39,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:32:39 BoogieIcfgContainer [2020-07-21 17:32:39,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:32:39,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:32:39,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:32:39,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:32:39,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:32:30" (1/3) ... [2020-07-21 17:32:39,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fd2f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:32:39, skipping insertion in model container [2020-07-21 17:32:39,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:34" (2/3) ... [2020-07-21 17:32:39,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fd2f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:32:39, skipping insertion in model container [2020-07-21 17:32:39,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:32:39" (3/3) ... [2020-07-21 17:32:39,439 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 17:32:39,451 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:32:39,469 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 17:32:39,485 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 17:32:39,517 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:32:39,518 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:32:39,518 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:32:39,518 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:32:39,518 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:32:39,518 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:32:39,518 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:32:39,519 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:32:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-21 17:32:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 17:32:39,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:39,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:39,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-21 17:32:39,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:39,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763189937] [2020-07-21 17:32:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:40,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:32:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:41,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:41,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763189937] [2020-07-21 17:32:41,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:41,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:32:41,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902499211] [2020-07-21 17:32:41,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:32:41,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:32:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:32:41,056 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-21 17:32:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:41,496 INFO L93 Difference]: Finished difference Result 4395 states and 7938 transitions. [2020-07-21 17:32:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:32:41,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 17:32:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:41,532 INFO L225 Difference]: With dead ends: 4395 [2020-07-21 17:32:41,533 INFO L226 Difference]: Without dead ends: 2918 [2020-07-21 17:32:41,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:32:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-07-21 17:32:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2875. [2020-07-21 17:32:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2020-07-21 17:32:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4738 transitions. [2020-07-21 17:32:41,741 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4738 transitions. Word has length 484 [2020-07-21 17:32:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:41,743 INFO L479 AbstractCegarLoop]: Abstraction has 2875 states and 4738 transitions. [2020-07-21 17:32:41,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:32:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4738 transitions. [2020-07-21 17:32:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 17:32:41,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:41,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:41,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:41,973 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2129727600, now seen corresponding path program 1 times [2020-07-21 17:32:41,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:41,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826420563] [2020-07-21 17:32:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:42,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 3110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:42,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:42,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:42,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826420563] [2020-07-21 17:32:42,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:42,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:42,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291130738] [2020-07-21 17:32:42,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:42,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:42,998 INFO L87 Difference]: Start difference. First operand 2875 states and 4738 transitions. Second operand 3 states. [2020-07-21 17:32:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:43,340 INFO L93 Difference]: Finished difference Result 8315 states and 13660 transitions. [2020-07-21 17:32:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:43,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 17:32:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:43,372 INFO L225 Difference]: With dead ends: 8315 [2020-07-21 17:32:43,372 INFO L226 Difference]: Without dead ends: 5669 [2020-07-21 17:32:43,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2020-07-21 17:32:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 5628. [2020-07-21 17:32:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2020-07-21 17:32:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 9249 transitions. [2020-07-21 17:32:43,647 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 9249 transitions. Word has length 486 [2020-07-21 17:32:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:43,648 INFO L479 AbstractCegarLoop]: Abstraction has 5628 states and 9249 transitions. [2020-07-21 17:32:43,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 9249 transitions. [2020-07-21 17:32:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 17:32:43,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:43,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:43,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:43,882 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1973900800, now seen corresponding path program 1 times [2020-07-21 17:32:43,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:43,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027416526] [2020-07-21 17:32:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:44,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:44,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:44,671 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 17:32:44,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:44,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027416526] [2020-07-21 17:32:44,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:44,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:44,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631056555] [2020-07-21 17:32:44,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:44,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:44,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:44,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:44,676 INFO L87 Difference]: Start difference. First operand 5628 states and 9249 transitions. Second operand 3 states. [2020-07-21 17:32:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:45,113 INFO L93 Difference]: Finished difference Result 16628 states and 27284 transitions. [2020-07-21 17:32:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:45,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 17:32:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:45,167 INFO L225 Difference]: With dead ends: 16628 [2020-07-21 17:32:45,168 INFO L226 Difference]: Without dead ends: 11031 [2020-07-21 17:32:45,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11031 states. [2020-07-21 17:32:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11031 to 5654. [2020-07-21 17:32:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5654 states. [2020-07-21 17:32:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 9287 transitions. [2020-07-21 17:32:45,516 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 9287 transitions. Word has length 487 [2020-07-21 17:32:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:45,516 INFO L479 AbstractCegarLoop]: Abstraction has 5654 states and 9287 transitions. [2020-07-21 17:32:45,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 9287 transitions. [2020-07-21 17:32:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:32:45,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:45,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:45,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:45,757 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash 950635083, now seen corresponding path program 1 times [2020-07-21 17:32:45,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:45,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497336858] [2020-07-21 17:32:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:46,321 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:46,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 3113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:46,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:46,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497336858] [2020-07-21 17:32:46,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:46,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:46,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079018849] [2020-07-21 17:32:46,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:46,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:46,577 INFO L87 Difference]: Start difference. First operand 5654 states and 9287 transitions. Second operand 3 states. [2020-07-21 17:32:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:46,992 INFO L93 Difference]: Finished difference Result 16453 states and 26967 transitions. [2020-07-21 17:32:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:46,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:32:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:47,035 INFO L225 Difference]: With dead ends: 16453 [2020-07-21 17:32:47,036 INFO L226 Difference]: Without dead ends: 11111 [2020-07-21 17:32:47,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11111 states. [2020-07-21 17:32:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11111 to 11072. [2020-07-21 17:32:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11072 states. [2020-07-21 17:32:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11072 states to 11072 states and 18122 transitions. [2020-07-21 17:32:47,544 INFO L78 Accepts]: Start accepts. Automaton has 11072 states and 18122 transitions. Word has length 488 [2020-07-21 17:32:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:47,545 INFO L479 AbstractCegarLoop]: Abstraction has 11072 states and 18122 transitions. [2020-07-21 17:32:47,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 11072 states and 18122 transitions. [2020-07-21 17:32:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:32:47,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:47,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:47,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:47,795 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1602834192, now seen corresponding path program 1 times [2020-07-21 17:32:47,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:47,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679500484] [2020-07-21 17:32:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:48,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:48,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:48,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:48,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679500484] [2020-07-21 17:32:48,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:48,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:48,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315557082] [2020-07-21 17:32:48,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:48,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:48,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:48,928 INFO L87 Difference]: Start difference. First operand 11072 states and 18122 transitions. Second operand 3 states. [2020-07-21 17:32:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:49,521 INFO L93 Difference]: Finished difference Result 33080 states and 54134 transitions. [2020-07-21 17:32:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:49,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:32:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:49,578 INFO L225 Difference]: With dead ends: 33080 [2020-07-21 17:32:49,579 INFO L226 Difference]: Without dead ends: 22072 [2020-07-21 17:32:49,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22072 states. [2020-07-21 17:32:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22072 to 11148. [2020-07-21 17:32:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-07-21 17:32:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18228 transitions. [2020-07-21 17:32:50,142 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18228 transitions. Word has length 488 [2020-07-21 17:32:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:50,142 INFO L479 AbstractCegarLoop]: Abstraction has 11148 states and 18228 transitions. [2020-07-21 17:32:50,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18228 transitions. [2020-07-21 17:32:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 17:32:50,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:50,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:50,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:50,390 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1856756007, now seen corresponding path program 1 times [2020-07-21 17:32:50,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:50,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41027199] [2020-07-21 17:32:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:51,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:51,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:51,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:51,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:51,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41027199] [2020-07-21 17:32:51,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:51,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:51,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163640053] [2020-07-21 17:32:51,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:51,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:51,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:51,151 INFO L87 Difference]: Start difference. First operand 11148 states and 18228 transitions. Second operand 3 states. [2020-07-21 17:32:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:51,919 INFO L93 Difference]: Finished difference Result 33236 states and 54350 transitions. [2020-07-21 17:32:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:51,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 17:32:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:51,971 INFO L225 Difference]: With dead ends: 33236 [2020-07-21 17:32:51,971 INFO L226 Difference]: Without dead ends: 22164 [2020-07-21 17:32:51,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22164 states. [2020-07-21 17:32:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22164 to 11240. [2020-07-21 17:32:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11240 states. [2020-07-21 17:32:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11240 states to 11240 states and 18354 transitions. [2020-07-21 17:32:52,504 INFO L78 Accepts]: Start accepts. Automaton has 11240 states and 18354 transitions. Word has length 489 [2020-07-21 17:32:52,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:52,505 INFO L479 AbstractCegarLoop]: Abstraction has 11240 states and 18354 transitions. [2020-07-21 17:32:52,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 11240 states and 18354 transitions. [2020-07-21 17:32:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 17:32:52,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:52,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:52,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:52,741 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1310792764, now seen corresponding path program 1 times [2020-07-21 17:32:52,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:52,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353960542] [2020-07-21 17:32:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:53,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:32:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:53,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:53,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353960542] [2020-07-21 17:32:53,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:53,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:32:53,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637529442] [2020-07-21 17:32:53,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:32:53,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:32:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:32:53,370 INFO L87 Difference]: Start difference. First operand 11240 states and 18354 transitions. Second operand 9 states. [2020-07-21 17:33:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:03,662 INFO L93 Difference]: Finished difference Result 68213 states and 110097 transitions. [2020-07-21 17:33:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:33:03,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 490 [2020-07-21 17:33:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:03,773 INFO L225 Difference]: With dead ends: 68213 [2020-07-21 17:33:03,773 INFO L226 Difference]: Without dead ends: 66249 [2020-07-21 17:33:03,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:33:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66249 states. [2020-07-21 17:33:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66249 to 23990. [2020-07-21 17:33:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23990 states. [2020-07-21 17:33:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 38708 transitions. [2020-07-21 17:33:05,927 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 38708 transitions. Word has length 490 [2020-07-21 17:33:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:05,927 INFO L479 AbstractCegarLoop]: Abstraction has 23990 states and 38708 transitions. [2020-07-21 17:33:05,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:33:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 38708 transitions. [2020-07-21 17:33:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 17:33:05,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:05,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:06,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:06,161 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash 143394572, now seen corresponding path program 1 times [2020-07-21 17:33:06,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:06,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491326776] [2020-07-21 17:33:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:06,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:06,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 3122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:06,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:06,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491326776] [2020-07-21 17:33:06,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:06,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:06,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702214285] [2020-07-21 17:33:06,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:06,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:06,877 INFO L87 Difference]: Start difference. First operand 23990 states and 38708 transitions. Second operand 3 states. [2020-07-21 17:33:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:08,060 INFO L93 Difference]: Finished difference Result 53364 states and 85671 transitions. [2020-07-21 17:33:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:08,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 17:33:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:08,116 INFO L225 Difference]: With dead ends: 53364 [2020-07-21 17:33:08,116 INFO L226 Difference]: Without dead ends: 33850 [2020-07-21 17:33:08,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2020-07-21 17:33:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 28378. [2020-07-21 17:33:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28378 states. [2020-07-21 17:33:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28378 states to 28378 states and 45980 transitions. [2020-07-21 17:33:09,509 INFO L78 Accepts]: Start accepts. Automaton has 28378 states and 45980 transitions. Word has length 490 [2020-07-21 17:33:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:09,510 INFO L479 AbstractCegarLoop]: Abstraction has 28378 states and 45980 transitions. [2020-07-21 17:33:09,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28378 states and 45980 transitions. [2020-07-21 17:33:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 17:33:09,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:09,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:09,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:09,733 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:09,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1488956710, now seen corresponding path program 1 times [2020-07-21 17:33:09,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:09,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730885327] [2020-07-21 17:33:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:10,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:10,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:10,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:10,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730885327] [2020-07-21 17:33:10,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:10,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:10,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120615020] [2020-07-21 17:33:10,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:10,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:10,729 INFO L87 Difference]: Start difference. First operand 28378 states and 45980 transitions. Second operand 3 states. [2020-07-21 17:33:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:13,200 INFO L93 Difference]: Finished difference Result 83068 states and 134439 transitions. [2020-07-21 17:33:13,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:13,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 17:33:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:13,269 INFO L225 Difference]: With dead ends: 83068 [2020-07-21 17:33:13,270 INFO L226 Difference]: Without dead ends: 55598 [2020-07-21 17:33:13,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55598 states. [2020-07-21 17:33:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55598 to 55561. [2020-07-21 17:33:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55561 states. [2020-07-21 17:33:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55561 states to 55561 states and 89713 transitions. [2020-07-21 17:33:15,390 INFO L78 Accepts]: Start accepts. Automaton has 55561 states and 89713 transitions. Word has length 490 [2020-07-21 17:33:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:15,391 INFO L479 AbstractCegarLoop]: Abstraction has 55561 states and 89713 transitions. [2020-07-21 17:33:15,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 55561 states and 89713 transitions. [2020-07-21 17:33:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 17:33:15,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:15,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:15,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:15,639 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1200166077, now seen corresponding path program 1 times [2020-07-21 17:33:15,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:15,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100132355] [2020-07-21 17:33:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:16,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:16,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:33:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:16,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:16,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100132355] [2020-07-21 17:33:16,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:16,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:33:16,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322519960] [2020-07-21 17:33:16,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:33:16,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:33:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:33:16,396 INFO L87 Difference]: Start difference. First operand 55561 states and 89713 transitions. Second operand 4 states. [2020-07-21 17:33:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:21,202 INFO L93 Difference]: Finished difference Result 160397 states and 258375 transitions. [2020-07-21 17:33:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:33:21,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-21 17:33:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:21,326 INFO L225 Difference]: With dead ends: 160397 [2020-07-21 17:33:21,327 INFO L226 Difference]: Without dead ends: 107039 [2020-07-21 17:33:21,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:33:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107039 states. [2020-07-21 17:33:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107039 to 56902. [2020-07-21 17:33:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56902 states. [2020-07-21 17:33:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56902 states to 56902 states and 92097 transitions. [2020-07-21 17:33:24,102 INFO L78 Accepts]: Start accepts. Automaton has 56902 states and 92097 transitions. Word has length 490 [2020-07-21 17:33:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:24,103 INFO L479 AbstractCegarLoop]: Abstraction has 56902 states and 92097 transitions. [2020-07-21 17:33:24,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:33:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 56902 states and 92097 transitions. [2020-07-21 17:33:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 17:33:24,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:24,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:24,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:24,366 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -750161328, now seen corresponding path program 1 times [2020-07-21 17:33:24,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:24,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107660952] [2020-07-21 17:33:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:24,743 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:24,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:33:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:24,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:24,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107660952] [2020-07-21 17:33:24,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:24,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:33:24,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867059323] [2020-07-21 17:33:24,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:33:24,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:33:24,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:33:24,913 INFO L87 Difference]: Start difference. First operand 56902 states and 92097 transitions. Second operand 9 states. [2020-07-21 17:33:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:49,129 INFO L93 Difference]: Finished difference Result 341533 states and 555094 transitions. [2020-07-21 17:33:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:33:49,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 492 [2020-07-21 17:33:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:49,560 INFO L225 Difference]: With dead ends: 341533 [2020-07-21 17:33:49,560 INFO L226 Difference]: Without dead ends: 324255 [2020-07-21 17:33:49,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:33:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324255 states. [2020-07-21 17:33:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324255 to 118070. [2020-07-21 17:33:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118070 states. [2020-07-21 17:33:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118070 states to 118070 states and 190557 transitions. [2020-07-21 17:33:59,847 INFO L78 Accepts]: Start accepts. Automaton has 118070 states and 190557 transitions. Word has length 492 [2020-07-21 17:33:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:59,847 INFO L479 AbstractCegarLoop]: Abstraction has 118070 states and 190557 transitions. [2020-07-21 17:33:59,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:33:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 118070 states and 190557 transitions. [2020-07-21 17:33:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 17:33:59,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:59,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:34:00,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:00,111 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1920673797, now seen corresponding path program 1 times [2020-07-21 17:34:00,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:00,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511729251] [2020-07-21 17:34:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:00,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:34:00,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:34:00,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:00,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:00,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511729251] [2020-07-21 17:34:00,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:00,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:34:00,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004559332] [2020-07-21 17:34:00,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:34:00,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:34:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:00,788 INFO L87 Difference]: Start difference. First operand 118070 states and 190557 transitions. Second operand 3 states. [2020-07-21 17:34:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:11,974 INFO L93 Difference]: Finished difference Result 285558 states and 461632 transitions. [2020-07-21 17:34:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:34:11,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 17:34:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:12,218 INFO L225 Difference]: With dead ends: 285558 [2020-07-21 17:34:12,219 INFO L226 Difference]: Without dead ends: 177712 [2020-07-21 17:34:12,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:12,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177712 states. [2020-07-21 17:34:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177712 to 153558. [2020-07-21 17:34:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153558 states. [2020-07-21 17:34:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153558 states to 153558 states and 248257 transitions. [2020-07-21 17:34:24,297 INFO L78 Accepts]: Start accepts. Automaton has 153558 states and 248257 transitions. Word has length 492 [2020-07-21 17:34:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:24,298 INFO L479 AbstractCegarLoop]: Abstraction has 153558 states and 248257 transitions. [2020-07-21 17:34:24,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:34:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 153558 states and 248257 transitions. [2020-07-21 17:34:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:34:24,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:24,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:34:24,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:24,568 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 229037093, now seen corresponding path program 1 times [2020-07-21 17:34:24,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:24,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354382459] [2020-07-21 17:34:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:24,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:34:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 17:34:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:25,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:25,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354382459] [2020-07-21 17:34:25,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:25,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 17:34:25,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985938249] [2020-07-21 17:34:25,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 17:34:25,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:25,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 17:34:25,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 17:34:25,515 INFO L87 Difference]: Start difference. First operand 153558 states and 248257 transitions. Second operand 12 states. [2020-07-21 17:35:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:35:29,556 INFO L93 Difference]: Finished difference Result 787258 states and 1277282 transitions. [2020-07-21 17:35:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-21 17:35:29,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 493 [2020-07-21 17:35:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:35:30,625 INFO L225 Difference]: With dead ends: 787258 [2020-07-21 17:35:30,625 INFO L226 Difference]: Without dead ends: 691676 [2020-07-21 17:35:30,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=552, Invalid=1704, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 17:35:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691676 states. [2020-07-21 17:35:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691676 to 142114. [2020-07-21 17:35:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142114 states. [2020-07-21 17:35:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142114 states to 142114 states and 229101 transitions. [2020-07-21 17:35:53,635 INFO L78 Accepts]: Start accepts. Automaton has 142114 states and 229101 transitions. Word has length 493 [2020-07-21 17:35:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:35:53,636 INFO L479 AbstractCegarLoop]: Abstraction has 142114 states and 229101 transitions. [2020-07-21 17:35:53,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 17:35:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 142114 states and 229101 transitions. [2020-07-21 17:35:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:35:53,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:35:53,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:35:53,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:53,891 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:35:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:35:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash -398942939, now seen corresponding path program 1 times [2020-07-21 17:35:53,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:35:53,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450365483] [2020-07-21 17:35:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:54,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:35:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:35:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:35:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:35:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:35:54,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:35:54,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450365483] [2020-07-21 17:35:54,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:35:54,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:35:54,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998752297] [2020-07-21 17:35:54,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:35:54,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:35:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:35:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:35:54,906 INFO L87 Difference]: Start difference. First operand 142114 states and 229101 transitions. Second operand 5 states. [2020-07-21 17:36:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:21,098 INFO L93 Difference]: Finished difference Result 357406 states and 578716 transitions. [2020-07-21 17:36:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:36:21,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-21 17:36:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:21,565 INFO L225 Difference]: With dead ends: 357406 [2020-07-21 17:36:21,565 INFO L226 Difference]: Without dead ends: 271560 [2020-07-21 17:36:21,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 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 17:36:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271560 states. [2020-07-21 17:36:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271560 to 271558. [2020-07-21 17:36:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271558 states. [2020-07-21 17:36:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271558 states to 271558 states and 436697 transitions. [2020-07-21 17:36:51,402 INFO L78 Accepts]: Start accepts. Automaton has 271558 states and 436697 transitions. Word has length 493 [2020-07-21 17:36:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:51,403 INFO L479 AbstractCegarLoop]: Abstraction has 271558 states and 436697 transitions. [2020-07-21 17:36:51,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:36:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 271558 states and 436697 transitions. [2020-07-21 17:36:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:36:51,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:51,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:51,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:51,728 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1385254560, now seen corresponding path program 1 times [2020-07-21 17:36:51,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:51,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745497407] [2020-07-21 17:36:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:52,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:52,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:52,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 3132 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:36:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:53,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:53,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745497407] [2020-07-21 17:36:53,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:53,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:36:53,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133584317] [2020-07-21 17:36:53,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:36:53,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:53,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:36:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:36:53,025 INFO L87 Difference]: Start difference. First operand 271558 states and 436697 transitions. Second operand 8 states. [2020-07-21 17:37:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:37:31,348 INFO L93 Difference]: Finished difference Result 441827 states and 711883 transitions. [2020-07-21 17:37:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:37:31,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 493 [2020-07-21 17:37:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:37:31,763 INFO L225 Difference]: With dead ends: 441827 [2020-07-21 17:37:31,763 INFO L226 Difference]: Without dead ends: 296365 [2020-07-21 17:37:31,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 17:37:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296365 states. [2020-07-21 17:37:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296365 to 132350. [2020-07-21 17:37:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132350 states. [2020-07-21 17:37:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132350 states to 132350 states and 210353 transitions. [2020-07-21 17:37:46,961 INFO L78 Accepts]: Start accepts. Automaton has 132350 states and 210353 transitions. Word has length 493 [2020-07-21 17:37:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:37:46,962 INFO L479 AbstractCegarLoop]: Abstraction has 132350 states and 210353 transitions. [2020-07-21 17:37:46,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:37:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 132350 states and 210353 transitions. [2020-07-21 17:37:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:37:47,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:37:47,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:37:47,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:47,216 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:37:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:37:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 757274528, now seen corresponding path program 1 times [2020-07-21 17:37:47,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:37:47,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842627786] [2020-07-21 17:37:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:48,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:37:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:37:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:37:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:37:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:37:48,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:37:48,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842627786] [2020-07-21 17:37:48,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:37:48,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:37:48,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436503876] [2020-07-21 17:37:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:37:48,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:37:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:37:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:37:48,444 INFO L87 Difference]: Start difference. First operand 132350 states and 210353 transitions. Second operand 4 states. [2020-07-21 17:38:21,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:21,390 INFO L93 Difference]: Finished difference Result 392336 states and 623269 transitions. [2020-07-21 17:38:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:38:21,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 17:38:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:21,730 INFO L225 Difference]: With dead ends: 392336 [2020-07-21 17:38:21,730 INFO L226 Difference]: Without dead ends: 261068 [2020-07-21 17:38:21,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:38:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261068 states. [2020-07-21 17:38:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261068 to 260618. [2020-07-21 17:38:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260618 states. [2020-07-21 17:38:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260618 states to 260618 states and 412835 transitions. [2020-07-21 17:38:49,974 INFO L78 Accepts]: Start accepts. Automaton has 260618 states and 412835 transitions. Word has length 493 [2020-07-21 17:38:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:38:49,974 INFO L479 AbstractCegarLoop]: Abstraction has 260618 states and 412835 transitions. [2020-07-21 17:38:49,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:38:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 260618 states and 412835 transitions. [2020-07-21 17:38:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 17:38:50,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:38:50,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:38:50,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:50,292 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:38:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:38:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2059201792, now seen corresponding path program 1 times [2020-07-21 17:38:50,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:38:50,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241627870] [2020-07-21 17:38:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:51,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:38:51,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:38:51,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:38:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:38:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:38:51,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:38:51,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241627870] [2020-07-21 17:38:51,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:38:51,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:38:51,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351003280] [2020-07-21 17:38:51,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:38:51,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:38:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:38:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:38:51,336 INFO L87 Difference]: Start difference. First operand 260618 states and 412835 transitions. Second operand 3 states. [2020-07-21 17:39:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:39:50,939 INFO L93 Difference]: Finished difference Result 769481 states and 1216189 transitions. [2020-07-21 17:39:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:39:50,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 17:39:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:39:51,678 INFO L225 Difference]: With dead ends: 769481 [2020-07-21 17:39:51,678 INFO L226 Difference]: Without dead ends: 515064 [2020-07-21 17:39:51,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:39:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515064 states. [2020-07-21 17:40:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515064 to 261562. [2020-07-21 17:40:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261562 states. [2020-07-21 17:40:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261562 states to 261562 states and 414230 transitions. [2020-07-21 17:40:30,781 INFO L78 Accepts]: Start accepts. Automaton has 261562 states and 414230 transitions. Word has length 495 [2020-07-21 17:40:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:30,782 INFO L479 AbstractCegarLoop]: Abstraction has 261562 states and 414230 transitions. [2020-07-21 17:40:30,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:40:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 261562 states and 414230 transitions. [2020-07-21 17:40:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 17:40:30,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:30,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:40:31,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:31,096 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1326148684, now seen corresponding path program 1 times [2020-07-21 17:40:31,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:31,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193151898] [2020-07-21 17:40:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:31,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:40:31,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 3131 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:40:31,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:31,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:31,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193151898] [2020-07-21 17:40:31,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:31,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:40:31,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619109554] [2020-07-21 17:40:31,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:40:31,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:40:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:40:31,859 INFO L87 Difference]: Start difference. First operand 261562 states and 414230 transitions. Second operand 3 states. [2020-07-21 17:41:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:41:33,672 INFO L93 Difference]: Finished difference Result 771651 states and 1221235 transitions. [2020-07-21 17:41:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:41:33,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 17:41:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:41:34,464 INFO L225 Difference]: With dead ends: 771651 [2020-07-21 17:41:34,465 INFO L226 Difference]: Without dead ends: 513981 [2020-07-21 17:41:34,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:41:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513981 states. [2020-07-21 17:42:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513981 to 513603. [2020-07-21 17:42:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513603 states. [2020-07-21 17:42:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513603 states to 513603 states and 810909 transitions. [2020-07-21 17:42:47,209 INFO L78 Accepts]: Start accepts. Automaton has 513603 states and 810909 transitions. Word has length 495 [2020-07-21 17:42:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:42:47,209 INFO L479 AbstractCegarLoop]: Abstraction has 513603 states and 810909 transitions. [2020-07-21 17:42:47,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:42:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 513603 states and 810909 transitions. [2020-07-21 17:42:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:42:47,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:42:47,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:42:47,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:42:47,669 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:42:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:42:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1584697987, now seen corresponding path program 1 times [2020-07-21 17:42:47,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:42:47,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905214645] [2020-07-21 17:42:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:42:48,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:42:48,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:42:48,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 3133 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:42:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:42:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:42:48,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:42:48,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905214645] [2020-07-21 17:42:48,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:42:48,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:42:48,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075733759] [2020-07-21 17:42:48,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:42:48,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:42:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:42:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:42:48,339 INFO L87 Difference]: Start difference. First operand 513603 states and 810909 transitions. Second operand 3 states.