/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:18:30,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:18:30,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:18:30,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:18:30,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:18:30,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:18:30,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:18:30,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:18:30,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:18:30,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:18:30,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:18:30,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:18:30,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:18:30,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:18:30,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:18:30,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:18:30,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:18:30,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:18:30,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:18:30,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:18:30,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:18:30,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:18:30,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:18:30,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:18:30,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 02:18:30,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 02:18:30,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 02:18:30,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 02:18:30,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 02:18:30,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 02:18:30,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:18:30,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:18:30,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:18:30,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:18:30,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:18:30,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:18:30,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:18:30,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:18:30,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:18:30,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:18:30,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:18:30,152 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 02:18:30,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:18:30,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:18:30,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:18:30,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:18:30,192 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:18:30,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:18:30,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:18:30,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:18:30,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:18:30,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:18:30,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:18:30,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:18:30,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:18:30,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:18:30,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:18:30,196 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:18:30,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:18:30,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:18:30,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:18:30,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:18:30,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:18:30,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:30,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:18:30,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:18:30,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:18:30,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:18:30,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:30,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:18:30,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:18:30,201 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:18:30,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:18:30,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:18:30,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:18:30,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:18:30,710 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:18:30,712 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 02:18:30,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5b1d997/a5db8292dab94bd4a4fbaa6a208ac053/FLAGc8aa15641 [2020-07-21 02:18:31,593 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:18:31,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 02:18:31,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5b1d997/a5db8292dab94bd4a4fbaa6a208ac053/FLAGc8aa15641 [2020-07-21 02:18:31,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5b1d997/a5db8292dab94bd4a4fbaa6a208ac053 [2020-07-21 02:18:31,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:18:31,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:18:31,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:31,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:18:31,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:18:31,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:31" (1/1) ... [2020-07-21 02:18:31,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:31, skipping insertion in model container [2020-07-21 02:18:31,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:31" (1/1) ... [2020-07-21 02:18:31,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:18:31,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:18:33,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:33,320 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:18:34,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:34,389 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:18:34,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34 WrapperNode [2020-07-21 02:18:34,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:34,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:18:34,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:18:34,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:18:34,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (1/1) ... [2020-07-21 02:18:34,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:18:34,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:18:34,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:18:34,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:18:34,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (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 02:18:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:18:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:18:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:18:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:18:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:18:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:18:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:18:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:18:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:18:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:18:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:18:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:18:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:18:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:18:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:18:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:18:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:18:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:18:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:18:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:18:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:18:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:18:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:18:38,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:18:38,850 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:18:38,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:38 BoogieIcfgContainer [2020-07-21 02:18:38,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:18:38,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:18:38,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:18:38,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:18:38,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:18:31" (1/3) ... [2020-07-21 02:18:38,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7480e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:38, skipping insertion in model container [2020-07-21 02:18:38,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:34" (2/3) ... [2020-07-21 02:18:38,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7480e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:38, skipping insertion in model container [2020-07-21 02:18:38,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:38" (3/3) ... [2020-07-21 02:18:38,877 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 02:18:38,888 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:18:38,901 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 02:18:38,915 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 02:18:38,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:18:38,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:18:38,950 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:18:38,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:18:38,950 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:18:38,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:18:38,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:18:38,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:18:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-21 02:18:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 02:18:39,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:39,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:39,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-21 02:18:39,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:39,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245466414] [2020-07-21 02:18:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:39,632 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:40,160 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 02:18:40,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:40,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245466414] [2020-07-21 02:18:40,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:40,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:40,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112074827] [2020-07-21 02:18:40,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:40,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:40,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:40,184 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-21 02:18:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:40,674 INFO L93 Difference]: Finished difference Result 4087 states and 7395 transitions. [2020-07-21 02:18:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:18:40,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 02:18:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:40,711 INFO L225 Difference]: With dead ends: 4087 [2020-07-21 02:18:40,712 INFO L226 Difference]: Without dead ends: 2727 [2020-07-21 02:18:40,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2020-07-21 02:18:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2687. [2020-07-21 02:18:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2687 states. [2020-07-21 02:18:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4394 transitions. [2020-07-21 02:18:40,911 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4394 transitions. Word has length 473 [2020-07-21 02:18:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:40,912 INFO L479 AbstractCegarLoop]: Abstraction has 2687 states and 4394 transitions. [2020-07-21 02:18:40,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4394 transitions. [2020-07-21 02:18:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 02:18:40,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:40,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:41,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:41,139 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash -379027308, now seen corresponding path program 1 times [2020-07-21 02:18:41,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:41,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796943306] [2020-07-21 02:18:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:41,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:41,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:41,838 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 02:18:41,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:41,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796943306] [2020-07-21 02:18:41,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:41,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:41,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003236409] [2020-07-21 02:18:41,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:41,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:41,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:41,843 INFO L87 Difference]: Start difference. First operand 2687 states and 4394 transitions. Second operand 3 states. [2020-07-21 02:18:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:42,143 INFO L93 Difference]: Finished difference Result 7724 states and 12580 transitions. [2020-07-21 02:18:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:42,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 02:18:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:42,172 INFO L225 Difference]: With dead ends: 7724 [2020-07-21 02:18:42,172 INFO L226 Difference]: Without dead ends: 5249 [2020-07-21 02:18:42,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2020-07-21 02:18:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 5206. [2020-07-21 02:18:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-07-21 02:18:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 8476 transitions. [2020-07-21 02:18:42,410 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 8476 transitions. Word has length 475 [2020-07-21 02:18:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:42,411 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 8476 transitions. [2020-07-21 02:18:42,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 8476 transitions. [2020-07-21 02:18:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 02:18:42,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:42,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:42,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:42,646 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:42,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2000020871, now seen corresponding path program 1 times [2020-07-21 02:18:42,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:42,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536753525] [2020-07-21 02:18:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:42,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:43,127 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 02:18:43,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:43,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536753525] [2020-07-21 02:18:43,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:43,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:43,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601504092] [2020-07-21 02:18:43,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:43,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:43,131 INFO L87 Difference]: Start difference. First operand 5206 states and 8476 transitions. Second operand 3 states. [2020-07-21 02:18:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:43,525 INFO L93 Difference]: Finished difference Result 15326 states and 24898 transitions. [2020-07-21 02:18:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:43,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 02:18:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:43,580 INFO L225 Difference]: With dead ends: 15326 [2020-07-21 02:18:43,581 INFO L226 Difference]: Without dead ends: 10202 [2020-07-21 02:18:43,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10202 states. [2020-07-21 02:18:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10202 to 5234. [2020-07-21 02:18:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2020-07-21 02:18:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8516 transitions. [2020-07-21 02:18:43,866 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8516 transitions. Word has length 476 [2020-07-21 02:18:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:43,867 INFO L479 AbstractCegarLoop]: Abstraction has 5234 states and 8516 transitions. [2020-07-21 02:18:43,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8516 transitions. [2020-07-21 02:18:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 02:18:43,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:43,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:44,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:44,100 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2134732313, now seen corresponding path program 1 times [2020-07-21 02:18:44,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:44,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327746440] [2020-07-21 02:18:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:44,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:44,611 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 02:18:44,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:44,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327746440] [2020-07-21 02:18:44,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:44,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:44,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657804657] [2020-07-21 02:18:44,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:44,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:44,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:44,614 INFO L87 Difference]: Start difference. First operand 5234 states and 8516 transitions. Second operand 4 states. [2020-07-21 02:18:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:45,022 INFO L93 Difference]: Finished difference Result 11573 states and 18955 transitions. [2020-07-21 02:18:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:45,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-21 02:18:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:45,057 INFO L225 Difference]: With dead ends: 11573 [2020-07-21 02:18:45,057 INFO L226 Difference]: Without dead ends: 6354 [2020-07-21 02:18:45,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6354 states. [2020-07-21 02:18:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6354 to 5317. [2020-07-21 02:18:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5317 states. [2020-07-21 02:18:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 8655 transitions. [2020-07-21 02:18:45,306 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 8655 transitions. Word has length 477 [2020-07-21 02:18:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:45,307 INFO L479 AbstractCegarLoop]: Abstraction has 5317 states and 8655 transitions. [2020-07-21 02:18:45,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 8655 transitions. [2020-07-21 02:18:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 02:18:45,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:45,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:45,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:45,543 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1794497967, now seen corresponding path program 1 times [2020-07-21 02:18:45,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:45,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884244713] [2020-07-21 02:18:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:45,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:45,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:46,101 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 02:18:46,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:46,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884244713] [2020-07-21 02:18:46,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:46,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:46,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937034987] [2020-07-21 02:18:46,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:46,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:46,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:46,104 INFO L87 Difference]: Start difference. First operand 5317 states and 8655 transitions. Second operand 3 states. [2020-07-21 02:18:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:46,502 INFO L93 Difference]: Finished difference Result 15861 states and 25816 transitions. [2020-07-21 02:18:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:46,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 02:18:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:46,551 INFO L225 Difference]: With dead ends: 15861 [2020-07-21 02:18:46,555 INFO L226 Difference]: Without dead ends: 10575 [2020-07-21 02:18:46,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10575 states. [2020-07-21 02:18:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10575 to 5343. [2020-07-21 02:18:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5343 states. [2020-07-21 02:18:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 8693 transitions. [2020-07-21 02:18:46,837 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 8693 transitions. Word has length 480 [2020-07-21 02:18:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:46,837 INFO L479 AbstractCegarLoop]: Abstraction has 5343 states and 8693 transitions. [2020-07-21 02:18:46,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 8693 transitions. [2020-07-21 02:18:46,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 02:18:46,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:46,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:47,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:47,073 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1766089123, now seen corresponding path program 1 times [2020-07-21 02:18:47,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:47,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3601860] [2020-07-21 02:18:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:47,444 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:48,103 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 02:18:48,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:48,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3601860] [2020-07-21 02:18:48,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:48,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:48,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537153841] [2020-07-21 02:18:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:48,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:48,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:48,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:48,107 INFO L87 Difference]: Start difference. First operand 5343 states and 8693 transitions. Second operand 3 states. [2020-07-21 02:18:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:48,574 INFO L93 Difference]: Finished difference Result 15683 states and 25516 transitions. [2020-07-21 02:18:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:48,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 02:18:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:48,599 INFO L225 Difference]: With dead ends: 15683 [2020-07-21 02:18:48,599 INFO L226 Difference]: Without dead ends: 10527 [2020-07-21 02:18:48,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2020-07-21 02:18:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 10489. [2020-07-21 02:18:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10489 states. [2020-07-21 02:18:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10489 states to 10489 states and 17013 transitions. [2020-07-21 02:18:49,129 INFO L78 Accepts]: Start accepts. Automaton has 10489 states and 17013 transitions. Word has length 481 [2020-07-21 02:18:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:49,129 INFO L479 AbstractCegarLoop]: Abstraction has 10489 states and 17013 transitions. [2020-07-21 02:18:49,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10489 states and 17013 transitions. [2020-07-21 02:18:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 02:18:49,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:49,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:49,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:49,365 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash 769559699, now seen corresponding path program 1 times [2020-07-21 02:18:49,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:49,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170030859] [2020-07-21 02:18:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:49,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:49,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:49,794 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 02:18:49,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:49,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170030859] [2020-07-21 02:18:49,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:49,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:49,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228211331] [2020-07-21 02:18:49,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:49,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:49,796 INFO L87 Difference]: Start difference. First operand 10489 states and 17013 transitions. Second operand 3 states. [2020-07-21 02:18:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:50,358 INFO L93 Difference]: Finished difference Result 31329 states and 50808 transitions. [2020-07-21 02:18:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:50,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 02:18:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:50,403 INFO L225 Difference]: With dead ends: 31329 [2020-07-21 02:18:50,403 INFO L226 Difference]: Without dead ends: 20892 [2020-07-21 02:18:50,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20892 states. [2020-07-21 02:18:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20892 to 10551. [2020-07-21 02:18:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10551 states. [2020-07-21 02:18:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 17106 transitions. [2020-07-21 02:18:50,929 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 17106 transitions. Word has length 481 [2020-07-21 02:18:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:50,929 INFO L479 AbstractCegarLoop]: Abstraction has 10551 states and 17106 transitions. [2020-07-21 02:18:50,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 17106 transitions. [2020-07-21 02:18:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 02:18:50,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:50,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:51,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:51,164 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1749651431, now seen corresponding path program 1 times [2020-07-21 02:18:51,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:51,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438303235] [2020-07-21 02:18:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:51,510 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:51,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:51,637 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 02:18:51,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:51,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438303235] [2020-07-21 02:18:51,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:51,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:51,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884458940] [2020-07-21 02:18:51,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:51,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:51,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:51,640 INFO L87 Difference]: Start difference. First operand 10551 states and 17106 transitions. Second operand 3 states. [2020-07-21 02:18:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:52,229 INFO L93 Difference]: Finished difference Result 31436 states and 50954 transitions. [2020-07-21 02:18:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:52,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 02:18:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:52,266 INFO L225 Difference]: With dead ends: 31436 [2020-07-21 02:18:52,266 INFO L226 Difference]: Without dead ends: 20998 [2020-07-21 02:18:52,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2020-07-21 02:18:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 10657. [2020-07-21 02:18:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10657 states. [2020-07-21 02:18:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10657 states to 10657 states and 17245 transitions. [2020-07-21 02:18:52,832 INFO L78 Accepts]: Start accepts. Automaton has 10657 states and 17245 transitions. Word has length 482 [2020-07-21 02:18:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:52,833 INFO L479 AbstractCegarLoop]: Abstraction has 10657 states and 17245 transitions. [2020-07-21 02:18:52,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10657 states and 17245 transitions. [2020-07-21 02:18:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 02:18:52,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:52,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:53,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:53,048 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash -719041507, now seen corresponding path program 1 times [2020-07-21 02:18:53,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:53,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205171521] [2020-07-21 02:18:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:53,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:53,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:53,588 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 02:18:53,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:53,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205171521] [2020-07-21 02:18:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:53,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:53,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89907232] [2020-07-21 02:18:53,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:53,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:53,591 INFO L87 Difference]: Start difference. First operand 10657 states and 17245 transitions. Second operand 3 states. [2020-07-21 02:18:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:54,545 INFO L93 Difference]: Finished difference Result 31029 states and 50246 transitions. [2020-07-21 02:18:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:54,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 02:18:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:54,585 INFO L225 Difference]: With dead ends: 31029 [2020-07-21 02:18:54,585 INFO L226 Difference]: Without dead ends: 20836 [2020-07-21 02:18:54,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20836 states. [2020-07-21 02:18:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20836 to 10809. [2020-07-21 02:18:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10809 states. [2020-07-21 02:18:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 17469 transitions. [2020-07-21 02:18:55,172 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 17469 transitions. Word has length 483 [2020-07-21 02:18:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:55,173 INFO L479 AbstractCegarLoop]: Abstraction has 10809 states and 17469 transitions. [2020-07-21 02:18:55,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 17469 transitions. [2020-07-21 02:18:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 02:18:55,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:55,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:55,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:55,467 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:55,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1501080077, now seen corresponding path program 1 times [2020-07-21 02:18:55,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:55,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826977507] [2020-07-21 02:18:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:55,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:55,950 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 02:18:55,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:55,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826977507] [2020-07-21 02:18:55,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:55,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:55,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077527532] [2020-07-21 02:18:55,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:55,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:55,952 INFO L87 Difference]: Start difference. First operand 10809 states and 17469 transitions. Second operand 3 states. [2020-07-21 02:18:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:56,524 INFO L93 Difference]: Finished difference Result 31286 states and 50603 transitions. [2020-07-21 02:18:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:56,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 02:18:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:56,547 INFO L225 Difference]: With dead ends: 31286 [2020-07-21 02:18:56,547 INFO L226 Difference]: Without dead ends: 21075 [2020-07-21 02:18:56,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21075 states. [2020-07-21 02:18:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21075 to 11048. [2020-07-21 02:18:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11048 states. [2020-07-21 02:18:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11048 states to 11048 states and 17781 transitions. [2020-07-21 02:18:57,545 INFO L78 Accepts]: Start accepts. Automaton has 11048 states and 17781 transitions. Word has length 484 [2020-07-21 02:18:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:57,550 INFO L479 AbstractCegarLoop]: Abstraction has 11048 states and 17781 transitions. [2020-07-21 02:18:57,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11048 states and 17781 transitions. [2020-07-21 02:18:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 02:18:57,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:57,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:57,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:57,784 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2035173401, now seen corresponding path program 1 times [2020-07-21 02:18:57,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:57,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853816118] [2020-07-21 02:18:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:58,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:58,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:58,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:58,263 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 02:18:58,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:58,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853816118] [2020-07-21 02:18:58,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:58,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:58,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767662916] [2020-07-21 02:18:58,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:58,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:58,265 INFO L87 Difference]: Start difference. First operand 11048 states and 17781 transitions. Second operand 4 states. [2020-07-21 02:18:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:59,010 INFO L93 Difference]: Finished difference Result 25706 states and 41756 transitions. [2020-07-21 02:18:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:59,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 02:18:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:59,034 INFO L225 Difference]: With dead ends: 25706 [2020-07-21 02:18:59,035 INFO L226 Difference]: Without dead ends: 13618 [2020-07-21 02:18:59,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13618 states. [2020-07-21 02:18:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13618 to 13580. [2020-07-21 02:18:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13580 states. [2020-07-21 02:18:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 21944 transitions. [2020-07-21 02:18:59,760 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 21944 transitions. Word has length 485 [2020-07-21 02:18:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:59,761 INFO L479 AbstractCegarLoop]: Abstraction has 13580 states and 21944 transitions. [2020-07-21 02:18:59,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 21944 transitions. [2020-07-21 02:18:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:18:59,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:59,772 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 02:18:59,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:59,979 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1215153266, now seen corresponding path program 1 times [2020-07-21 02:18:59,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:59,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343250969] [2020-07-21 02:18:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:00,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:00,583 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 02:19:00,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:00,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343250969] [2020-07-21 02:19:00,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:00,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:00,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679953234] [2020-07-21 02:19:00,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:00,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:00,586 INFO L87 Difference]: Start difference. First operand 13580 states and 21944 transitions. Second operand 4 states. [2020-07-21 02:19:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:01,758 INFO L93 Difference]: Finished difference Result 40021 states and 64712 transitions. [2020-07-21 02:19:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:01,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 02:19:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:01,784 INFO L225 Difference]: With dead ends: 40021 [2020-07-21 02:19:01,785 INFO L226 Difference]: Without dead ends: 26677 [2020-07-21 02:19:01,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 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 02:19:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2020-07-21 02:19:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26560. [2020-07-21 02:19:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26560 states. [2020-07-21 02:19:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26560 states to 26560 states and 42772 transitions. [2020-07-21 02:19:02,808 INFO L78 Accepts]: Start accepts. Automaton has 26560 states and 42772 transitions. Word has length 487 [2020-07-21 02:19:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:02,808 INFO L479 AbstractCegarLoop]: Abstraction has 26560 states and 42772 transitions. [2020-07-21 02:19:02,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26560 states and 42772 transitions. [2020-07-21 02:19:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 02:19:02,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:02,838 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 02:19:03,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:03,053 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:03,054 INFO L82 PathProgramCache]: Analyzing trace with hash 368568658, now seen corresponding path program 1 times [2020-07-21 02:19:03,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:03,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501061230] [2020-07-21 02:19:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:03,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:03,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:19:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:03,700 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 02:19:03,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:03,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501061230] [2020-07-21 02:19:03,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:03,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:03,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232754597] [2020-07-21 02:19:03,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:03,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:03,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:03,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:03,703 INFO L87 Difference]: Start difference. First operand 26560 states and 42772 transitions. Second operand 4 states. [2020-07-21 02:19:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:06,959 INFO L93 Difference]: Finished difference Result 72086 states and 115924 transitions. [2020-07-21 02:19:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:06,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 02:19:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:07,031 INFO L225 Difference]: With dead ends: 72086 [2020-07-21 02:19:07,031 INFO L226 Difference]: Without dead ends: 50157 [2020-07-21 02:19:07,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 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 02:19:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50157 states. [2020-07-21 02:19:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50157 to 30369. [2020-07-21 02:19:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30369 states. [2020-07-21 02:19:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30369 states to 30369 states and 49193 transitions. [2020-07-21 02:19:08,460 INFO L78 Accepts]: Start accepts. Automaton has 30369 states and 49193 transitions. Word has length 488 [2020-07-21 02:19:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:08,460 INFO L479 AbstractCegarLoop]: Abstraction has 30369 states and 49193 transitions. [2020-07-21 02:19:08,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 30369 states and 49193 transitions. [2020-07-21 02:19:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 02:19:08,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:08,502 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 02:19:08,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:08,716 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1769495683, now seen corresponding path program 1 times [2020-07-21 02:19:08,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:08,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399740941] [2020-07-21 02:19:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:09,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:09,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:09,467 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 02:19:09,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:09,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399740941] [2020-07-21 02:19:09,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:09,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:09,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396405725] [2020-07-21 02:19:09,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:09,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:09,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:09,469 INFO L87 Difference]: Start difference. First operand 30369 states and 49193 transitions. Second operand 3 states. [2020-07-21 02:19:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:11,886 INFO L93 Difference]: Finished difference Result 83442 states and 135466 transitions. [2020-07-21 02:19:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:11,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 02:19:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:11,968 INFO L225 Difference]: With dead ends: 83442 [2020-07-21 02:19:11,968 INFO L226 Difference]: Without dead ends: 58118 [2020-07-21 02:19:12,005 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 02:19:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58118 states. [2020-07-21 02:19:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58118 to 58078. [2020-07-21 02:19:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58078 states. [2020-07-21 02:19:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58078 states to 58078 states and 93943 transitions. [2020-07-21 02:19:15,828 INFO L78 Accepts]: Start accepts. Automaton has 58078 states and 93943 transitions. Word has length 489 [2020-07-21 02:19:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:15,828 INFO L479 AbstractCegarLoop]: Abstraction has 58078 states and 93943 transitions. [2020-07-21 02:19:15,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 58078 states and 93943 transitions. [2020-07-21 02:19:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 02:19:15,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:15,873 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] [2020-07-21 02:19:16,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:16,074 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1053028354, now seen corresponding path program 1 times [2020-07-21 02:19:16,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:16,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380863401] [2020-07-21 02:19:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:16,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:16,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:16,551 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 02:19:16,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:16,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380863401] [2020-07-21 02:19:16,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:16,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:16,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485216352] [2020-07-21 02:19:16,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:16,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:16,552 INFO L87 Difference]: Start difference. First operand 58078 states and 93943 transitions. Second operand 4 states. [2020-07-21 02:19:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:20,506 INFO L93 Difference]: Finished difference Result 139234 states and 227718 transitions. [2020-07-21 02:19:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:20,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 02:19:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:20,574 INFO L225 Difference]: With dead ends: 139234 [2020-07-21 02:19:20,575 INFO L226 Difference]: Without dead ends: 71702 [2020-07-21 02:19:20,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 02:19:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71702 states. [2020-07-21 02:19:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71702 to 71196. [2020-07-21 02:19:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71196 states. [2020-07-21 02:19:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71196 states to 71196 states and 116057 transitions. [2020-07-21 02:19:25,547 INFO L78 Accepts]: Start accepts. Automaton has 71196 states and 116057 transitions. Word has length 491 [2020-07-21 02:19:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:25,547 INFO L479 AbstractCegarLoop]: Abstraction has 71196 states and 116057 transitions. [2020-07-21 02:19:25,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 71196 states and 116057 transitions. [2020-07-21 02:19:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 02:19:25,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:25,603 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 02:19:25,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:25,803 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:25,804 INFO L82 PathProgramCache]: Analyzing trace with hash -854579077, now seen corresponding path program 1 times [2020-07-21 02:19:25,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:25,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918586504] [2020-07-21 02:19:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:26,202 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:26,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:26,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:26,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918586504] [2020-07-21 02:19:26,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:26,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:26,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375747613] [2020-07-21 02:19:26,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:26,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:26,425 INFO L87 Difference]: Start difference. First operand 71196 states and 116057 transitions. Second operand 3 states. [2020-07-21 02:19:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:32,078 INFO L93 Difference]: Finished difference Result 192564 states and 312890 transitions. [2020-07-21 02:19:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:32,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 02:19:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:32,218 INFO L225 Difference]: With dead ends: 192564 [2020-07-21 02:19:32,218 INFO L226 Difference]: Without dead ends: 133847 [2020-07-21 02:19:32,269 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 02:19:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133847 states. [2020-07-21 02:19:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133847 to 133448. [2020-07-21 02:19:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133448 states. [2020-07-21 02:19:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133448 states to 133448 states and 216408 transitions. [2020-07-21 02:19:40,355 INFO L78 Accepts]: Start accepts. Automaton has 133448 states and 216408 transitions. Word has length 492 [2020-07-21 02:19:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:40,356 INFO L479 AbstractCegarLoop]: Abstraction has 133448 states and 216408 transitions. [2020-07-21 02:19:40,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 133448 states and 216408 transitions. [2020-07-21 02:19:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 02:19:40,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:40,463 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 02:19:40,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:40,664 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 437217195, now seen corresponding path program 1 times [2020-07-21 02:19:40,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:40,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164148498] [2020-07-21 02:19:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:41,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:41,124 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 02:19:41,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:41,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164148498] [2020-07-21 02:19:41,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:41,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:41,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423825302] [2020-07-21 02:19:41,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:41,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:41,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:41,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:41,126 INFO L87 Difference]: Start difference. First operand 133448 states and 216408 transitions. Second operand 3 states. [2020-07-21 02:19:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:50,859 INFO L93 Difference]: Finished difference Result 254240 states and 410649 transitions. [2020-07-21 02:19:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:50,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 02:19:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:51,057 INFO L225 Difference]: With dead ends: 254240 [2020-07-21 02:19:51,057 INFO L226 Difference]: Without dead ends: 187322 [2020-07-21 02:19:51,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187322 states. [2020-07-21 02:20:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187322 to 130926. [2020-07-21 02:20:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130926 states. [2020-07-21 02:20:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130926 states to 130926 states and 212299 transitions. [2020-07-21 02:20:01,154 INFO L78 Accepts]: Start accepts. Automaton has 130926 states and 212299 transitions. Word has length 493 [2020-07-21 02:20:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:01,154 INFO L479 AbstractCegarLoop]: Abstraction has 130926 states and 212299 transitions. [2020-07-21 02:20:01,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 130926 states and 212299 transitions. [2020-07-21 02:20:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 02:20:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:01,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:01,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:01,457 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2025033674, now seen corresponding path program 1 times [2020-07-21 02:20:01,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:01,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37951505] [2020-07-21 02:20:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:01,804 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:01,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:01,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:01,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:01,917 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 02:20:01,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:01,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37951505] [2020-07-21 02:20:01,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:01,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:01,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404720105] [2020-07-21 02:20:01,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:01,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:01,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:01,919 INFO L87 Difference]: Start difference. First operand 130926 states and 212299 transitions. Second operand 4 states. [2020-07-21 02:20:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:11,662 INFO L93 Difference]: Finished difference Result 316221 states and 516056 transitions. [2020-07-21 02:20:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:11,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-21 02:20:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:11,848 INFO L225 Difference]: With dead ends: 316221 [2020-07-21 02:20:11,848 INFO L226 Difference]: Without dead ends: 172666 [2020-07-21 02:20:11,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 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 02:20:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172666 states. [2020-07-21 02:20:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172666 to 172267. [2020-07-21 02:20:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172267 states. [2020-07-21 02:20:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172267 states to 172267 states and 280505 transitions. [2020-07-21 02:20:24,773 INFO L78 Accepts]: Start accepts. Automaton has 172267 states and 280505 transitions. Word has length 494 [2020-07-21 02:20:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:24,773 INFO L479 AbstractCegarLoop]: Abstraction has 172267 states and 280505 transitions. [2020-07-21 02:20:24,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 172267 states and 280505 transitions. [2020-07-21 02:20:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:20:25,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:25,310 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 02:20:25,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:25,511 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:25,512 INFO L82 PathProgramCache]: Analyzing trace with hash 277638833, now seen corresponding path program 1 times [2020-07-21 02:20:25,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:25,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647918560] [2020-07-21 02:20:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:25,859 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:25,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:25,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647918560] [2020-07-21 02:20:25,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:25,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:25,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758120099] [2020-07-21 02:20:25,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:25,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:25,962 INFO L87 Difference]: Start difference. First operand 172267 states and 280505 transitions. Second operand 3 states. [2020-07-21 02:20:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:44,740 INFO L93 Difference]: Finished difference Result 493204 states and 802681 transitions. [2020-07-21 02:20:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:44,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:20:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:45,102 INFO L225 Difference]: With dead ends: 493204 [2020-07-21 02:20:45,102 INFO L226 Difference]: Without dead ends: 323358 [2020-07-21 02:20:45,208 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 02:20:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323358 states. [2020-07-21 02:20:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323358 to 170774. [2020-07-21 02:20:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170774 states. [2020-07-21 02:20:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170774 states to 170774 states and 277781 transitions. [2020-07-21 02:20:56,036 INFO L78 Accepts]: Start accepts. Automaton has 170774 states and 277781 transitions. Word has length 495 [2020-07-21 02:20:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:56,036 INFO L479 AbstractCegarLoop]: Abstraction has 170774 states and 277781 transitions. [2020-07-21 02:20:56,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 170774 states and 277781 transitions. [2020-07-21 02:20:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:20:56,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:56,181 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 02:20:56,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:56,393 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash -70443877, now seen corresponding path program 1 times [2020-07-21 02:20:56,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:56,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880977773] [2020-07-21 02:20:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:56,719 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:56,822 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 02:20:56,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:56,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880977773] [2020-07-21 02:20:56,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:56,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:56,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110857042] [2020-07-21 02:20:56,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:56,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:56,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:56,824 INFO L87 Difference]: Start difference. First operand 170774 states and 277781 transitions. Second operand 3 states. [2020-07-21 02:21:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:16,104 INFO L93 Difference]: Finished difference Result 483546 states and 784822 transitions. [2020-07-21 02:21:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:16,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:21:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:16,424 INFO L225 Difference]: With dead ends: 483546 [2020-07-21 02:21:16,424 INFO L226 Difference]: Without dead ends: 314139 [2020-07-21 02:21:16,536 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 02:21:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314139 states. [2020-07-21 02:21:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314139 to 170692. [2020-07-21 02:21:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170692 states. [2020-07-21 02:21:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170692 states to 170692 states and 277635 transitions. [2020-07-21 02:21:27,584 INFO L78 Accepts]: Start accepts. Automaton has 170692 states and 277635 transitions. Word has length 495 [2020-07-21 02:21:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:27,584 INFO L479 AbstractCegarLoop]: Abstraction has 170692 states and 277635 transitions. [2020-07-21 02:21:27,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 170692 states and 277635 transitions. [2020-07-21 02:21:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:21:27,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:27,738 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 02:21:27,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:27,939 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash 580706254, now seen corresponding path program 1 times [2020-07-21 02:21:27,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:27,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53445239] [2020-07-21 02:21:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:28,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:28,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:28,387 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 02:21:28,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:28,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53445239] [2020-07-21 02:21:28,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:28,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:28,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764272494] [2020-07-21 02:21:28,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:28,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:28,389 INFO L87 Difference]: Start difference. First operand 170692 states and 277635 transitions. Second operand 3 states. [2020-07-21 02:21:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:46,818 INFO L93 Difference]: Finished difference Result 443632 states and 716045 transitions. [2020-07-21 02:21:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:46,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:21:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:47,148 INFO L225 Difference]: With dead ends: 443632 [2020-07-21 02:21:47,148 INFO L226 Difference]: Without dead ends: 306643 [2020-07-21 02:21:47,247 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 02:21:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306643 states. [2020-07-21 02:22:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306643 to 176182. [2020-07-21 02:22:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176182 states. [2020-07-21 02:22:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176182 states to 176182 states and 285757 transitions. [2020-07-21 02:22:03,549 INFO L78 Accepts]: Start accepts. Automaton has 176182 states and 285757 transitions. Word has length 495 [2020-07-21 02:22:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:03,549 INFO L479 AbstractCegarLoop]: Abstraction has 176182 states and 285757 transitions. [2020-07-21 02:22:03,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 176182 states and 285757 transitions. [2020-07-21 02:22:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:22:03,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:03,698 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 02:22:03,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:03,899 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:03,900 INFO L82 PathProgramCache]: Analyzing trace with hash -89157083, now seen corresponding path program 1 times [2020-07-21 02:22:03,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:03,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155607924] [2020-07-21 02:22:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:04,301 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:22:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:04,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:22:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:04,677 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 02:22:04,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:04,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155607924] [2020-07-21 02:22:04,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:04,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:22:04,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534698361] [2020-07-21 02:22:04,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:22:04,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:22:04,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:04,681 INFO L87 Difference]: Start difference. First operand 176182 states and 285757 transitions. Second operand 3 states. [2020-07-21 02:22:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:25,606 INFO L93 Difference]: Finished difference Result 474619 states and 767209 transitions. [2020-07-21 02:22:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:22:25,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 02:22:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:25,979 INFO L225 Difference]: With dead ends: 474619 [2020-07-21 02:22:25,979 INFO L226 Difference]: Without dead ends: 336658 [2020-07-21 02:22:26,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 02:22:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336658 states. [2020-07-21 02:22:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336658 to 336607. [2020-07-21 02:22:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336607 states. [2020-07-21 02:22:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336607 states to 336607 states and 543701 transitions. [2020-07-21 02:22:51,684 INFO L78 Accepts]: Start accepts. Automaton has 336607 states and 543701 transitions. Word has length 496 [2020-07-21 02:22:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:51,685 INFO L479 AbstractCegarLoop]: Abstraction has 336607 states and 543701 transitions. [2020-07-21 02:22:51,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 336607 states and 543701 transitions. [2020-07-21 02:22:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:22:52,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:52,020 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 02:22:52,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:52,234 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:52,234 INFO L82 PathProgramCache]: Analyzing trace with hash -253808264, now seen corresponding path program 1 times [2020-07-21 02:22:52,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:52,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295444423] [2020-07-21 02:22:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:52,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:52,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:22:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:52,678 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 02:22:52,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:52,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295444423] [2020-07-21 02:22:52,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:52,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:22:52,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144687014] [2020-07-21 02:22:52,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:22:52,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:22:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:52,680 INFO L87 Difference]: Start difference. First operand 336607 states and 543701 transitions. Second operand 3 states. [2020-07-21 02:23:38,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:38,305 INFO L93 Difference]: Finished difference Result 876281 states and 1404253 transitions. [2020-07-21 02:23:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:38,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 02:23:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:39,092 INFO L225 Difference]: With dead ends: 876281 [2020-07-21 02:23:39,092 INFO L226 Difference]: Without dead ends: 602372 [2020-07-21 02:23:39,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 02:23:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602372 states. [2020-07-21 02:24:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602372 to 351403. [2020-07-21 02:24:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351403 states. [2020-07-21 02:24:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351403 states to 351403 states and 564793 transitions. [2020-07-21 02:24:10,622 INFO L78 Accepts]: Start accepts. Automaton has 351403 states and 564793 transitions. Word has length 496 [2020-07-21 02:24:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:10,622 INFO L479 AbstractCegarLoop]: Abstraction has 351403 states and 564793 transitions. [2020-07-21 02:24:10,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 351403 states and 564793 transitions. [2020-07-21 02:24:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 02:24:10,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:10,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:11,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:11,196 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1486454398, now seen corresponding path program 1 times [2020-07-21 02:24:11,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:11,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640509956] [2020-07-21 02:24:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:11,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:11,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:11,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:11,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:11,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:11,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640509956] [2020-07-21 02:24:11,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:11,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:11,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631022949] [2020-07-21 02:24:11,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:11,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:11,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:11,660 INFO L87 Difference]: Start difference. First operand 351403 states and 564793 transitions. Second operand 3 states. [2020-07-21 02:25:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:00,586 INFO L93 Difference]: Finished difference Result 917375 states and 1464371 transitions. [2020-07-21 02:25:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:00,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 02:25:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:01,383 INFO L225 Difference]: With dead ends: 917375 [2020-07-21 02:25:01,383 INFO L226 Difference]: Without dead ends: 638592 [2020-07-21 02:25:01,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 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 02:25:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638592 states. [2020-07-21 02:25:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638592 to 380451. [2020-07-21 02:25:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380451 states. [2020-07-21 02:25:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380451 states to 380451 states and 603045 transitions. [2020-07-21 02:25:37,961 INFO L78 Accepts]: Start accepts. Automaton has 380451 states and 603045 transitions. Word has length 497 [2020-07-21 02:25:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:37,961 INFO L479 AbstractCegarLoop]: Abstraction has 380451 states and 603045 transitions. [2020-07-21 02:25:37,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:25:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 380451 states and 603045 transitions. [2020-07-21 02:25:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:25:38,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:38,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:38,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:38,537 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1877354371, now seen corresponding path program 1 times [2020-07-21 02:25:38,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:38,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506365986] [2020-07-21 02:25:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:38,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:38,979 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 02:25:38,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:38,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506365986] [2020-07-21 02:25:38,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:38,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:38,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508910268] [2020-07-21 02:25:38,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:38,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:38,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:38,980 INFO L87 Difference]: Start difference. First operand 380451 states and 603045 transitions. Second operand 3 states. [2020-07-21 02:26:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:36,435 INFO L93 Difference]: Finished difference Result 1013887 states and 1607909 transitions. [2020-07-21 02:26:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:26:36,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 02:26:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:37,645 INFO L225 Difference]: With dead ends: 1013887 [2020-07-21 02:26:37,646 INFO L226 Difference]: Without dead ends: 717820 [2020-07-21 02:26:37,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 02:26:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717820 states. [2020-07-21 02:27:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717820 to 717806. [2020-07-21 02:27:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717806 states. [2020-07-21 02:27:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717806 states to 717806 states and 1134819 transitions. [2020-07-21 02:27:42,411 INFO L78 Accepts]: Start accepts. Automaton has 717806 states and 1134819 transitions. Word has length 498 [2020-07-21 02:27:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:42,412 INFO L479 AbstractCegarLoop]: Abstraction has 717806 states and 1134819 transitions. [2020-07-21 02:27:42,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 717806 states and 1134819 transitions. [2020-07-21 02:27:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:27:43,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:43,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:43,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:43,370 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1780725120, now seen corresponding path program 1 times [2020-07-21 02:27:43,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:43,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955724242] [2020-07-21 02:27:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:43,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:43,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:27:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:43,894 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 02:27:43,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:43,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955724242] [2020-07-21 02:27:43,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:43,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:43,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791743151] [2020-07-21 02:27:43,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:43,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:43,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:43,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:43,897 INFO L87 Difference]: Start difference. First operand 717806 states and 1134819 transitions. Second operand 4 states. [2020-07-21 02:29:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:26,839 INFO L93 Difference]: Finished difference Result 1883900 states and 2974305 transitions. [2020-07-21 02:29:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:26,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 02:29:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:28,840 INFO L225 Difference]: With dead ends: 1883900 [2020-07-21 02:29:28,840 INFO L226 Difference]: Without dead ends: 1299807 [2020-07-21 02:29:30,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299807 states.