/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:24:14,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:24:14,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:24:14,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:24:14,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:24:14,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:24:14,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:24:14,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:24:14,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:24:14,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:24:14,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:24:14,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:24:14,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:24:14,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:24:14,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:24:14,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:24:14,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:24:14,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:24:14,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:24:14,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:24:14,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:24:14,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:24:14,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:24:14,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:24:14,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:24:14,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:24:14,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:24:14,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:24:14,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:24:14,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:24:14,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:24:14,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:24:14,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:24:14,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:24:14,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:24:14,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:24:14,798 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 [2020-07-20 18:24:14,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:24:14,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:24:14,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:24:14,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:24:14,827 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:24:14,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:24:14,832 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:24:14,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:24:14,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:24:14,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:24:14,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:24:14,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:24:14,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:24:14,834 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:24:14,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:24:14,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:24:14,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:24:14,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:24:14,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:24:14,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:24:14,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:24:14,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:24:14,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:24:14,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:24:14,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:24:14,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:24:14,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:14,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:24:14,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:24:14,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:24:15,116 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:24:15,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:24:15,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:24:15,140 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:24:15,142 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:24:15,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 18:24:15,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d85e7b9/e7816da7ec30445f9be9d8cf604cfe45/FLAGdce5b446e [2020-07-20 18:24:15,952 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:24:15,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 18:24:15,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d85e7b9/e7816da7ec30445f9be9d8cf604cfe45/FLAGdce5b446e [2020-07-20 18:24:16,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d85e7b9/e7816da7ec30445f9be9d8cf604cfe45 [2020-07-20 18:24:16,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:24:16,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:24:16,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:24:16,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:24:16,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:24:16,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:24:16" (1/1) ... [2020-07-20 18:24:16,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ab4010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:16, skipping insertion in model container [2020-07-20 18:24:16,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:24:16" (1/1) ... [2020-07-20 18:24:16,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:24:16,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:24:17,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:24:17,988 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:24:18,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:24:18,947 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:24:18,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18 WrapperNode [2020-07-20 18:24:18,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:24:18,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:24:18,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:24:18,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:24:18,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:18,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:19,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:19,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:19,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:19,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:19,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (1/1) ... [2020-07-20 18:24:19,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:24:19,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:24:19,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:24:19,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:24:19,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (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 [2020-07-20 18:24:19,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:24:19,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:24:19,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:24:19,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:24:19,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:24:19,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:24:19,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:24:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:24:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:24:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:24:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:24:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:24:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:24:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:24:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:24:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:24:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 18:24:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:24:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:24:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:24:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:24:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:24:23,557 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:24:23,557 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:24:23,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:24:23 BoogieIcfgContainer [2020-07-20 18:24:23,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:24:23,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:24:23,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:24:23,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:24:23,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:24:16" (1/3) ... [2020-07-20 18:24:23,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2904bf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:24:23, skipping insertion in model container [2020-07-20 18:24:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:18" (2/3) ... [2020-07-20 18:24:23,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2904bf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:24:23, skipping insertion in model container [2020-07-20 18:24:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:24:23" (3/3) ... [2020-07-20 18:24:23,585 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 18:24:23,594 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:24:23,603 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 18:24:23,618 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 18:24:23,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:24:23,674 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:24:23,674 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:24:23,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:24:23,675 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:24:23,675 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:24:23,675 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:24:23,675 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:24:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-20 18:24:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 18:24:23,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:23,774 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] [2020-07-20 18:24:23,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-20 18:24:23,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:23,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976563924] [2020-07-20 18:24:23,793 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 [2020-07-20 18:24:24,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:24,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:24,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976563924] [2020-07-20 18:24:25,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:25,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:25,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320492222] [2020-07-20 18:24:25,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:25,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:25,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:25,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:25,024 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 4 states. [2020-07-20 18:24:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:25,480 INFO L93 Difference]: Finished difference Result 4011 states and 7259 transitions. [2020-07-20 18:24:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:24:25,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2020-07-20 18:24:25,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:25,514 INFO L225 Difference]: With dead ends: 4011 [2020-07-20 18:24:25,514 INFO L226 Difference]: Without dead ends: 2675 [2020-07-20 18:24:25,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-07-20 18:24:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2647. [2020-07-20 18:24:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-07-20 18:24:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4345 transitions. [2020-07-20 18:24:25,727 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4345 transitions. Word has length 464 [2020-07-20 18:24:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:25,728 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4345 transitions. [2020-07-20 18:24:25,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4345 transitions. [2020-07-20 18:24:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-20 18:24:25,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:25,744 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] [2020-07-20 18:24:25,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:25,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1921306330, now seen corresponding path program 1 times [2020-07-20 18:24:25,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:25,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588889292] [2020-07-20 18:24:25,962 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 [2020-07-20 18:24:26,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:26,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:26,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588889292] [2020-07-20 18:24:26,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:26,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:26,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081534868] [2020-07-20 18:24:26,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:26,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:26,858 INFO L87 Difference]: Start difference. First operand 2647 states and 4345 transitions. Second operand 3 states. [2020-07-20 18:24:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:27,180 INFO L93 Difference]: Finished difference Result 7667 states and 12552 transitions. [2020-07-20 18:24:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:27,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2020-07-20 18:24:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:27,209 INFO L225 Difference]: With dead ends: 7667 [2020-07-20 18:24:27,209 INFO L226 Difference]: Without dead ends: 5160 [2020-07-20 18:24:27,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2020-07-20 18:24:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 5129. [2020-07-20 18:24:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5129 states. [2020-07-20 18:24:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 8382 transitions. [2020-07-20 18:24:27,412 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 8382 transitions. Word has length 466 [2020-07-20 18:24:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:27,413 INFO L479 AbstractCegarLoop]: Abstraction has 5129 states and 8382 transitions. [2020-07-20 18:24:27,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 8382 transitions. [2020-07-20 18:24:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 18:24:27,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:27,428 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] [2020-07-20 18:24:27,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:27,643 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1941062663, now seen corresponding path program 1 times [2020-07-20 18:24:27,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:27,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009792790] [2020-07-20 18:24:27,646 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 [2020-07-20 18:24:28,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:28,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:28,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009792790] [2020-07-20 18:24:28,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:28,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:28,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910698549] [2020-07-20 18:24:28,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:28,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:28,354 INFO L87 Difference]: Start difference. First operand 5129 states and 8382 transitions. Second operand 3 states. [2020-07-20 18:24:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:28,758 INFO L93 Difference]: Finished difference Result 15198 states and 24806 transitions. [2020-07-20 18:24:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:28,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-20 18:24:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:28,810 INFO L225 Difference]: With dead ends: 15198 [2020-07-20 18:24:28,810 INFO L226 Difference]: Without dead ends: 10137 [2020-07-20 18:24:28,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10137 states. [2020-07-20 18:24:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10137 to 5157. [2020-07-20 18:24:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5157 states. [2020-07-20 18:24:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5157 states to 5157 states and 8424 transitions. [2020-07-20 18:24:29,111 INFO L78 Accepts]: Start accepts. Automaton has 5157 states and 8424 transitions. Word has length 467 [2020-07-20 18:24:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:29,111 INFO L479 AbstractCegarLoop]: Abstraction has 5157 states and 8424 transitions. [2020-07-20 18:24:29,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5157 states and 8424 transitions. [2020-07-20 18:24:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 18:24:29,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:29,126 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] [2020-07-20 18:24:29,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:29,340 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1266341259, now seen corresponding path program 1 times [2020-07-20 18:24:29,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:29,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475845199] [2020-07-20 18:24:29,342 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 [2020-07-20 18:24:29,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:29,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:30,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:30,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475845199] [2020-07-20 18:24:30,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:30,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:30,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006815735] [2020-07-20 18:24:30,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:30,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:30,132 INFO L87 Difference]: Start difference. First operand 5157 states and 8424 transitions. Second operand 3 states. [2020-07-20 18:24:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:30,575 INFO L93 Difference]: Finished difference Result 15176 states and 24770 transitions. [2020-07-20 18:24:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:30,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 468 [2020-07-20 18:24:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:30,625 INFO L225 Difference]: With dead ends: 15176 [2020-07-20 18:24:30,625 INFO L226 Difference]: Without dead ends: 10188 [2020-07-20 18:24:30,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2020-07-20 18:24:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 10162. [2020-07-20 18:24:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10162 states. [2020-07-20 18:24:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10162 states to 10162 states and 16544 transitions. [2020-07-20 18:24:31,042 INFO L78 Accepts]: Start accepts. Automaton has 10162 states and 16544 transitions. Word has length 468 [2020-07-20 18:24:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:31,043 INFO L479 AbstractCegarLoop]: Abstraction has 10162 states and 16544 transitions. [2020-07-20 18:24:31,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10162 states and 16544 transitions. [2020-07-20 18:24:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 18:24:31,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:31,073 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] [2020-07-20 18:24:31,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:31,288 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 471737850, now seen corresponding path program 1 times [2020-07-20 18:24:31,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:31,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142066500] [2020-07-20 18:24:31,290 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 [2020-07-20 18:24:31,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:31,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:31,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142066500] [2020-07-20 18:24:31,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:31,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:31,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260077040] [2020-07-20 18:24:31,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:31,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:31,819 INFO L87 Difference]: Start difference. First operand 10162 states and 16544 transitions. Second operand 3 states. [2020-07-20 18:24:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:32,463 INFO L93 Difference]: Finished difference Result 30178 states and 49084 transitions. [2020-07-20 18:24:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:32,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 468 [2020-07-20 18:24:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:32,506 INFO L225 Difference]: With dead ends: 30178 [2020-07-20 18:24:32,507 INFO L226 Difference]: Without dead ends: 20139 [2020-07-20 18:24:32,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20139 states. [2020-07-20 18:24:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20139 to 10252. [2020-07-20 18:24:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10252 states. [2020-07-20 18:24:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10252 states to 10252 states and 16668 transitions. [2020-07-20 18:24:32,981 INFO L78 Accepts]: Start accepts. Automaton has 10252 states and 16668 transitions. Word has length 468 [2020-07-20 18:24:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:32,981 INFO L479 AbstractCegarLoop]: Abstraction has 10252 states and 16668 transitions. [2020-07-20 18:24:32,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10252 states and 16668 transitions. [2020-07-20 18:24:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 18:24:33,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:33,008 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] [2020-07-20 18:24:33,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:33,223 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1272823246, now seen corresponding path program 1 times [2020-07-20 18:24:33,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:33,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11501880] [2020-07-20 18:24:33,224 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 [2020-07-20 18:24:33,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:33,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:33,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:33,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:33,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11501880] [2020-07-20 18:24:33,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:33,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:33,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989270342] [2020-07-20 18:24:33,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:33,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:33,812 INFO L87 Difference]: Start difference. First operand 10252 states and 16668 transitions. Second operand 4 states. [2020-07-20 18:24:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:34,467 INFO L93 Difference]: Finished difference Result 22726 states and 37161 transitions. [2020-07-20 18:24:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:34,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-07-20 18:24:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:34,505 INFO L225 Difference]: With dead ends: 22726 [2020-07-20 18:24:34,505 INFO L226 Difference]: Without dead ends: 12493 [2020-07-20 18:24:34,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2020-07-20 18:24:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 10480. [2020-07-20 18:24:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10480 states. [2020-07-20 18:24:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 17026 transitions. [2020-07-20 18:24:34,978 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 17026 transitions. Word has length 469 [2020-07-20 18:24:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:34,979 INFO L479 AbstractCegarLoop]: Abstraction has 10480 states and 17026 transitions. [2020-07-20 18:24:34,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 17026 transitions. [2020-07-20 18:24:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 18:24:35,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:35,004 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] [2020-07-20 18:24:35,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:35,220 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash -215519356, now seen corresponding path program 1 times [2020-07-20 18:24:35,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:35,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772615380] [2020-07-20 18:24:35,222 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 [2020-07-20 18:24:35,548 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:35,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:35,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772615380] [2020-07-20 18:24:35,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:35,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:35,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144741056] [2020-07-20 18:24:35,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:35,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:35,777 INFO L87 Difference]: Start difference. First operand 10480 states and 17026 transitions. Second operand 3 states. [2020-07-20 18:24:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:36,198 INFO L93 Difference]: Finished difference Result 31267 states and 50794 transitions. [2020-07-20 18:24:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:36,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-20 18:24:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:36,247 INFO L225 Difference]: With dead ends: 31267 [2020-07-20 18:24:36,248 INFO L226 Difference]: Without dead ends: 20815 [2020-07-20 18:24:36,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20815 states. [2020-07-20 18:24:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20815 to 10510. [2020-07-20 18:24:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10510 states. [2020-07-20 18:24:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10510 states to 10510 states and 17069 transitions. [2020-07-20 18:24:36,808 INFO L78 Accepts]: Start accepts. Automaton has 10510 states and 17069 transitions. Word has length 472 [2020-07-20 18:24:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:36,809 INFO L479 AbstractCegarLoop]: Abstraction has 10510 states and 17069 transitions. [2020-07-20 18:24:36,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10510 states and 17069 transitions. [2020-07-20 18:24:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 18:24:37,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:37,398 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] [2020-07-20 18:24:37,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:37,599 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1593069581, now seen corresponding path program 1 times [2020-07-20 18:24:37,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:37,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635120787] [2020-07-20 18:24:37,601 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 [2020-07-20 18:24:37,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:37,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:38,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:38,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635120787] [2020-07-20 18:24:38,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:38,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:38,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131953571] [2020-07-20 18:24:38,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:38,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:38,088 INFO L87 Difference]: Start difference. First operand 10510 states and 17069 transitions. Second operand 3 states. [2020-07-20 18:24:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:38,818 INFO L93 Difference]: Finished difference Result 30404 states and 49395 transitions. [2020-07-20 18:24:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:38,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-20 18:24:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:38,930 INFO L225 Difference]: With dead ends: 30404 [2020-07-20 18:24:38,930 INFO L226 Difference]: Without dead ends: 20546 [2020-07-20 18:24:38,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20546 states. [2020-07-20 18:24:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20546 to 20522. [2020-07-20 18:24:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20522 states. [2020-07-20 18:24:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20522 states to 20522 states and 33230 transitions. [2020-07-20 18:24:39,541 INFO L78 Accepts]: Start accepts. Automaton has 20522 states and 33230 transitions. Word has length 473 [2020-07-20 18:24:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:39,541 INFO L479 AbstractCegarLoop]: Abstraction has 20522 states and 33230 transitions. [2020-07-20 18:24:39,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 20522 states and 33230 transitions. [2020-07-20 18:24:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 18:24:39,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:39,575 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] [2020-07-20 18:24:39,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:39,790 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash 531009232, now seen corresponding path program 1 times [2020-07-20 18:24:39,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:39,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767929666] [2020-07-20 18:24:39,793 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 [2020-07-20 18:24:40,115 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:40,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:40,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:24:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:40,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:40,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767929666] [2020-07-20 18:24:40,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:40,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:40,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49929908] [2020-07-20 18:24:40,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:40,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:40,274 INFO L87 Difference]: Start difference. First operand 20522 states and 33230 transitions. Second operand 4 states. [2020-07-20 18:24:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:41,923 INFO L93 Difference]: Finished difference Result 58526 states and 94437 transitions. [2020-07-20 18:24:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:41,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 18:24:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:41,994 INFO L225 Difference]: With dead ends: 58526 [2020-07-20 18:24:41,994 INFO L226 Difference]: Without dead ends: 40457 [2020-07-20 18:24:42,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40457 states. [2020-07-20 18:24:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40457 to 22820. [2020-07-20 18:24:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22820 states. [2020-07-20 18:24:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22820 states to 22820 states and 37323 transitions. [2020-07-20 18:24:43,060 INFO L78 Accepts]: Start accepts. Automaton has 22820 states and 37323 transitions. Word has length 473 [2020-07-20 18:24:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:43,060 INFO L479 AbstractCegarLoop]: Abstraction has 22820 states and 37323 transitions. [2020-07-20 18:24:43,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 22820 states and 37323 transitions. [2020-07-20 18:24:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 18:24:43,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:43,079 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] [2020-07-20 18:24:43,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:43,289 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1005142096, now seen corresponding path program 1 times [2020-07-20 18:24:43,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:43,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827194756] [2020-07-20 18:24:43,291 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 [2020-07-20 18:24:43,776 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:43,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:43,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827194756] [2020-07-20 18:24:43,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:43,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:43,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409777077] [2020-07-20 18:24:43,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:43,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:43,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:43,886 INFO L87 Difference]: Start difference. First operand 22820 states and 37323 transitions. Second operand 3 states. [2020-07-20 18:24:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:45,704 INFO L93 Difference]: Finished difference Result 68362 states and 111807 transitions. [2020-07-20 18:24:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:45,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-20 18:24:45,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:45,776 INFO L225 Difference]: With dead ends: 68362 [2020-07-20 18:24:45,777 INFO L226 Difference]: Without dead ends: 45579 [2020-07-20 18:24:45,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2020-07-20 18:24:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 22871. [2020-07-20 18:24:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22871 states. [2020-07-20 18:24:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22871 states to 22871 states and 37394 transitions. [2020-07-20 18:24:46,929 INFO L78 Accepts]: Start accepts. Automaton has 22871 states and 37394 transitions. Word has length 473 [2020-07-20 18:24:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:46,930 INFO L479 AbstractCegarLoop]: Abstraction has 22871 states and 37394 transitions. [2020-07-20 18:24:46,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 22871 states and 37394 transitions. [2020-07-20 18:24:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 18:24:46,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:46,949 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] [2020-07-20 18:24:47,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:47,163 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1054617598, now seen corresponding path program 1 times [2020-07-20 18:24:47,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:47,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693056086] [2020-07-20 18:24:47,165 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 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 [2020-07-20 18:24:47,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:47,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:47,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:47,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693056086] [2020-07-20 18:24:47,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:47,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:47,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842467349] [2020-07-20 18:24:47,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:47,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:47,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:47,783 INFO L87 Difference]: Start difference. First operand 22871 states and 37394 transitions. Second operand 3 states. [2020-07-20 18:24:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:49,278 INFO L93 Difference]: Finished difference Result 68191 states and 111494 transitions. [2020-07-20 18:24:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:49,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-20 18:24:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:49,334 INFO L225 Difference]: With dead ends: 68191 [2020-07-20 18:24:49,334 INFO L226 Difference]: Without dead ends: 45346 [2020-07-20 18:24:49,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45346 states. [2020-07-20 18:24:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45346 to 22951. [2020-07-20 18:24:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22951 states. [2020-07-20 18:24:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 37506 transitions. [2020-07-20 18:24:50,324 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 37506 transitions. Word has length 474 [2020-07-20 18:24:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:50,324 INFO L479 AbstractCegarLoop]: Abstraction has 22951 states and 37506 transitions. [2020-07-20 18:24:50,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 37506 transitions. [2020-07-20 18:24:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 18:24:50,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:50,355 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] [2020-07-20 18:24:50,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:50,570 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2034723068, now seen corresponding path program 1 times [2020-07-20 18:24:50,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:50,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476095224] [2020-07-20 18:24:50,572 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 [2020-07-20 18:24:51,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:51,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:51,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:51,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476095224] [2020-07-20 18:24:51,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:51,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:51,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147142495] [2020-07-20 18:24:51,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:51,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:51,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:51,304 INFO L87 Difference]: Start difference. First operand 22951 states and 37506 transitions. Second operand 4 states. [2020-07-20 18:24:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:52,604 INFO L93 Difference]: Finished difference Result 55497 states and 91574 transitions. [2020-07-20 18:24:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:52,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-07-20 18:24:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:52,638 INFO L225 Difference]: With dead ends: 55497 [2020-07-20 18:24:52,638 INFO L226 Difference]: Without dead ends: 28725 [2020-07-20 18:24:52,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28725 states. [2020-07-20 18:24:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28725 to 28698. [2020-07-20 18:24:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28698 states. [2020-07-20 18:24:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28698 states to 28698 states and 47062 transitions. [2020-07-20 18:24:54,677 INFO L78 Accepts]: Start accepts. Automaton has 28698 states and 47062 transitions. Word has length 475 [2020-07-20 18:24:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:54,677 INFO L479 AbstractCegarLoop]: Abstraction has 28698 states and 47062 transitions. [2020-07-20 18:24:54,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28698 states and 47062 transitions. [2020-07-20 18:24:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 18:24:54,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:54,700 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] [2020-07-20 18:24:54,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:54,901 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:54,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1978876042, now seen corresponding path program 1 times [2020-07-20 18:24:54,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:54,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575922325] [2020-07-20 18:24:54,903 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 [2020-07-20 18:24:55,429 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:55,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:55,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575922325] [2020-07-20 18:24:55,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:55,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:55,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961407765] [2020-07-20 18:24:55,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:55,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:55,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:55,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:55,569 INFO L87 Difference]: Start difference. First operand 28698 states and 47062 transitions. Second operand 3 states. [2020-07-20 18:24:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:57,571 INFO L93 Difference]: Finished difference Result 83633 states and 137107 transitions. [2020-07-20 18:24:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:57,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-20 18:24:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:57,634 INFO L225 Difference]: With dead ends: 83633 [2020-07-20 18:24:57,634 INFO L226 Difference]: Without dead ends: 55500 [2020-07-20 18:24:57,662 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 [2020-07-20 18:24:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55500 states. [2020-07-20 18:24:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55500 to 29449. [2020-07-20 18:24:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29449 states. [2020-07-20 18:24:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29449 states to 29449 states and 48093 transitions. [2020-07-20 18:24:59,216 INFO L78 Accepts]: Start accepts. Automaton has 29449 states and 48093 transitions. Word has length 476 [2020-07-20 18:24:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:59,216 INFO L479 AbstractCegarLoop]: Abstraction has 29449 states and 48093 transitions. [2020-07-20 18:24:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 29449 states and 48093 transitions. [2020-07-20 18:24:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 18:24:59,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:59,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:59,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:59,455 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:59,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1306792617, now seen corresponding path program 1 times [2020-07-20 18:24:59,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:59,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547049456] [2020-07-20 18:24:59,459 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 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 [2020-07-20 18:24:59,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:59,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 18:24:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:00,026 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:00,090 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:00,123 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:00,332 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:00,403 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 18:25:00,404 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 18:25:00,407 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 18:25:01,188 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:01,244 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:02,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:02,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547049456] [2020-07-20 18:25:02,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:02,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-20 18:25:02,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225874496] [2020-07-20 18:25:02,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 18:25:02,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:02,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 18:25:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-20 18:25:02,410 INFO L87 Difference]: Start difference. First operand 29449 states and 48093 transitions. Second operand 15 states. [2020-07-20 18:25:02,653 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-07-20 18:25:14,703 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 18:25:15,769 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-07-20 18:25:15,997 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-07-20 18:25:17,056 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-07-20 18:25:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:22,507 INFO L93 Difference]: Finished difference Result 80585 states and 127434 transitions. [2020-07-20 18:25:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 18:25:22,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 478 [2020-07-20 18:25:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:22,575 INFO L225 Difference]: With dead ends: 80585 [2020-07-20 18:25:22,575 INFO L226 Difference]: Without dead ends: 68364 [2020-07-20 18:25:22,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 451 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2020-07-20 18:25:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68364 states. [2020-07-20 18:25:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68364 to 55041. [2020-07-20 18:25:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55041 states. [2020-07-20 18:25:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55041 states to 55041 states and 87043 transitions. [2020-07-20 18:25:25,569 INFO L78 Accepts]: Start accepts. Automaton has 55041 states and 87043 transitions. Word has length 478 [2020-07-20 18:25:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:25,570 INFO L479 AbstractCegarLoop]: Abstraction has 55041 states and 87043 transitions. [2020-07-20 18:25:25,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 18:25:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 55041 states and 87043 transitions. [2020-07-20 18:25:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 18:25:25,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:25,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:25:25,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:25,818 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash 187671384, now seen corresponding path program 1 times [2020-07-20 18:25:25,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:25,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348584543] [2020-07-20 18:25:25,820 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 [2020-07-20 18:25:26,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:25:26,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:25:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:26,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:26,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348584543] [2020-07-20 18:25:26,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:26,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:25:26,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707175427] [2020-07-20 18:25:26,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:25:26,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:25:26,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:25:26,832 INFO L87 Difference]: Start difference. First operand 55041 states and 87043 transitions. Second operand 4 states. [2020-07-20 18:25:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:33,632 INFO L93 Difference]: Finished difference Result 158804 states and 250908 transitions. [2020-07-20 18:25:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:25:33,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-20 18:25:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:33,737 INFO L225 Difference]: With dead ends: 158804 [2020-07-20 18:25:33,738 INFO L226 Difference]: Without dead ends: 105507 [2020-07-20 18:25:33,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:25:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105507 states. [2020-07-20 18:25:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105507 to 105134. [2020-07-20 18:25:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105134 states. [2020-07-20 18:25:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105134 states to 105134 states and 165267 transitions. [2020-07-20 18:25:39,607 INFO L78 Accepts]: Start accepts. Automaton has 105134 states and 165267 transitions. Word has length 478 [2020-07-20 18:25:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:39,608 INFO L479 AbstractCegarLoop]: Abstraction has 105134 states and 165267 transitions. [2020-07-20 18:25:39,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:25:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 105134 states and 165267 transitions. [2020-07-20 18:25:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 18:25:39,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:39,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:25:39,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:39,888 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1115798282, now seen corresponding path program 1 times [2020-07-20 18:25:39,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:39,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251343137] [2020-07-20 18:25:39,890 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 [2020-07-20 18:25:40,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:25:40,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:25:40,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:40,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:40,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251343137] [2020-07-20 18:25:40,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:40,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:25:40,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226743563] [2020-07-20 18:25:40,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:25:40,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:25:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:25:40,343 INFO L87 Difference]: Start difference. First operand 105134 states and 165267 transitions. Second operand 4 states. [2020-07-20 18:25:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:52,520 INFO L93 Difference]: Finished difference Result 289666 states and 452803 transitions. [2020-07-20 18:25:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:25:52,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-20 18:25:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:52,726 INFO L225 Difference]: With dead ends: 289666 [2020-07-20 18:25:52,726 INFO L226 Difference]: Without dead ends: 198059 [2020-07-20 18:25:52,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:25:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198059 states. [2020-07-20 18:26:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198059 to 113038. [2020-07-20 18:26:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113038 states. [2020-07-20 18:26:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113038 states to 113038 states and 179226 transitions. [2020-07-20 18:26:02,890 INFO L78 Accepts]: Start accepts. Automaton has 113038 states and 179226 transitions. Word has length 479 [2020-07-20 18:26:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:26:02,890 INFO L479 AbstractCegarLoop]: Abstraction has 113038 states and 179226 transitions. [2020-07-20 18:26:02,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:26:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 113038 states and 179226 transitions. [2020-07-20 18:26:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 18:26:02,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:26:02,976 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] [2020-07-20 18:26:03,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:26:03,177 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:26:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:26:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 549230204, now seen corresponding path program 1 times [2020-07-20 18:26:03,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:26:03,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885248111] [2020-07-20 18:26:03,179 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 [2020-07-20 18:26:03,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:26:03,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:26:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 2775 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:26:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:26:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:26:03,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:26:03,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885248111] [2020-07-20 18:26:03,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:26:03,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:26:03,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248007111] [2020-07-20 18:26:03,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:26:03,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:26:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:26:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:26:03,983 INFO L87 Difference]: Start difference. First operand 113038 states and 179226 transitions. Second operand 3 states. [2020-07-20 18:26:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:26:19,063 INFO L93 Difference]: Finished difference Result 324970 states and 515202 transitions. [2020-07-20 18:26:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:26:19,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-20 18:26:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:26:19,347 INFO L225 Difference]: With dead ends: 324970 [2020-07-20 18:26:19,347 INFO L226 Difference]: Without dead ends: 218843 [2020-07-20 18:26:19,441 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 [2020-07-20 18:26:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218843 states. [2020-07-20 18:26:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218843 to 218778. [2020-07-20 18:26:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218778 states. [2020-07-20 18:26:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218778 states to 218778 states and 345809 transitions. [2020-07-20 18:26:36,488 INFO L78 Accepts]: Start accepts. Automaton has 218778 states and 345809 transitions. Word has length 480 [2020-07-20 18:26:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:26:36,488 INFO L479 AbstractCegarLoop]: Abstraction has 218778 states and 345809 transitions. [2020-07-20 18:26:36,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:26:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 218778 states and 345809 transitions. [2020-07-20 18:26:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 18:26:37,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:26:37,084 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] [2020-07-20 18:26:37,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:26:37,298 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:26:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:26:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1415420023, now seen corresponding path program 1 times [2020-07-20 18:26:37,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:26:37,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46459588] [2020-07-20 18:26:37,300 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 [2020-07-20 18:26:37,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:26:37,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:26:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:26:37,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:26:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:26:38,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:26:38,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46459588] [2020-07-20 18:26:38,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:26:38,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:26:38,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110919095] [2020-07-20 18:26:38,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:26:38,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:26:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:26:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:26:38,003 INFO L87 Difference]: Start difference. First operand 218778 states and 345809 transitions. Second operand 3 states. [2020-07-20 18:27:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:27:07,583 INFO L93 Difference]: Finished difference Result 638440 states and 1007745 transitions. [2020-07-20 18:27:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:27:07,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-20 18:27:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:27:08,063 INFO L225 Difference]: With dead ends: 638440 [2020-07-20 18:27:08,064 INFO L226 Difference]: Without dead ends: 429905 [2020-07-20 18:27:08,213 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 [2020-07-20 18:27:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429905 states. [2020-07-20 18:27:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429905 to 429617. [2020-07-20 18:27:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429617 states. [2020-07-20 18:27:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429617 states to 429617 states and 676029 transitions. [2020-07-20 18:27:47,508 INFO L78 Accepts]: Start accepts. Automaton has 429617 states and 676029 transitions. Word has length 482 [2020-07-20 18:27:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:27:47,508 INFO L479 AbstractCegarLoop]: Abstraction has 429617 states and 676029 transitions. [2020-07-20 18:27:47,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:27:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 429617 states and 676029 transitions. [2020-07-20 18:27:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:27:47,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:27:47,870 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] [2020-07-20 18:27:48,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:27:48,071 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:27:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:27:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash -841597765, now seen corresponding path program 1 times [2020-07-20 18:27:48,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:27:48,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639009459] [2020-07-20 18:27:48,073 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 [2020-07-20 18:27:48,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:27:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:27:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:27:48,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:27:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:27:48,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:27:48,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639009459] [2020-07-20 18:27:48,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:27:48,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:27:48,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241903281] [2020-07-20 18:27:48,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:27:48,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:27:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:27:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:27:48,527 INFO L87 Difference]: Start difference. First operand 429617 states and 676029 transitions. Second operand 4 states. [2020-07-20 18:28:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:55,524 INFO L93 Difference]: Finished difference Result 1175107 states and 1833357 transitions. [2020-07-20 18:28:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:28:55,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-20 18:28:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:56,483 INFO L225 Difference]: With dead ends: 1175107 [2020-07-20 18:28:56,484 INFO L226 Difference]: Without dead ends: 813766 [2020-07-20 18:28:56,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:28:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813766 states. [2020-07-20 18:29:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813766 to 480067. [2020-07-20 18:29:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480067 states. [2020-07-20 18:29:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480067 states to 480067 states and 763693 transitions. [2020-07-20 18:29:42,616 INFO L78 Accepts]: Start accepts. Automaton has 480067 states and 763693 transitions. Word has length 483 [2020-07-20 18:29:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:42,617 INFO L479 AbstractCegarLoop]: Abstraction has 480067 states and 763693 transitions. [2020-07-20 18:29:42,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:29:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 480067 states and 763693 transitions. [2020-07-20 18:29:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 18:29:43,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:43,056 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] [2020-07-20 18:29:43,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:43,257 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1957419239, now seen corresponding path program 1 times [2020-07-20 18:29:43,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:43,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634943349] [2020-07-20 18:29:43,258 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 [2020-07-20 18:29:43,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:29:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 18:29:43,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:45,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:45,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634943349] [2020-07-20 18:29:45,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:45,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 18:29:45,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251523683] [2020-07-20 18:29:45,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 18:29:45,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 18:29:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 18:29:45,267 INFO L87 Difference]: Start difference. First operand 480067 states and 763693 transitions. Second operand 14 states. [2020-07-20 18:34:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:08,799 INFO L93 Difference]: Finished difference Result 2476179 states and 3891259 transitions. [2020-07-20 18:34:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-20 18:34:08,800 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 484 [2020-07-20 18:34:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:12,985 INFO L225 Difference]: With dead ends: 2476179 [2020-07-20 18:34:12,986 INFO L226 Difference]: Without dead ends: 2334822 [2020-07-20 18:34:13,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1145, Invalid=4257, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 18:34:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334822 states.