/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:17:49,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:17:49,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:17:49,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:17:49,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:17:49,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:17:49,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:17:49,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:17:49,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:17:49,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:17:49,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:17:49,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:17:49,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:17:49,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:17:49,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:17:49,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:17:49,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:17:49,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:17:49,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:17:49,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:17:49,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:17:49,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:17:49,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:17:49,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:17:49,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:17:49,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:17:49,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:17:49,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:17:49,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:17:49,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:17:49,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:17:49,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:17:49,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:17:49,573 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:17:49,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:17:49,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:17:49,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:17:49,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:17:49,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:17:49,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:17:49,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:17:49,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:17:49,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:17:49,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:17:49,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:17:49,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:17:49,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:17:49,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:17:49,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:17:49,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:17:49,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:17:49,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:17:49,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:17:49,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:17:49,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:17:49,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:49,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:17:49,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:17:49,578 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 -> NOT_INCREMENTALLY [2020-07-21 12:17:49,869 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:17:49,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:17:49,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:17:49,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:17:49,886 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:17:49,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 12:17:49,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73fb43d9b/ae61764ed1084101b3c978d6f66d355a/FLAGb6bee488a [2020-07-21 12:17:50,638 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:17:50,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 12:17:50,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73fb43d9b/ae61764ed1084101b3c978d6f66d355a/FLAGb6bee488a [2020-07-21 12:17:50,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73fb43d9b/ae61764ed1084101b3c978d6f66d355a [2020-07-21 12:17:50,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:17:50,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:17:50,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:17:50,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:17:50,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:17:50,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:17:50" (1/1) ... [2020-07-21 12:17:50,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f50e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:50, skipping insertion in model container [2020-07-21 12:17:50,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:17:50" (1/1) ... [2020-07-21 12:17:50,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:17:50,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:17:52,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:17:52,578 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:17:53,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:17:53,697 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:17:53,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53 WrapperNode [2020-07-21 12:17:53,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:17:53,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:17:53,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:17:53,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:17:53,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... [2020-07-21 12:17:53,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:17:53,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:17:53,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:17:53,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:17:53,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:17:54,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:17:54,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:17:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:17:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:17:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:17:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:17:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 12:17:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:17:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:17:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:17:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:17:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:17:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:17:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:17:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:17:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:17:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:17:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:17:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:17:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:17:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:17:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:17:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:17:57,817 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:17:57,818 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:17:57,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:17:57 BoogieIcfgContainer [2020-07-21 12:17:57,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:17:57,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:17:57,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:17:57,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:17:57,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:17:50" (1/3) ... [2020-07-21 12:17:57,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65808c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:17:57, skipping insertion in model container [2020-07-21 12:17:57,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:53" (2/3) ... [2020-07-21 12:17:57,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65808c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:17:57, skipping insertion in model container [2020-07-21 12:17:57,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:17:57" (3/3) ... [2020-07-21 12:17:57,839 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 12:17:57,853 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:17:57,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 12:17:57,882 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 12:17:57,920 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:17:57,920 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:17:57,921 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:17:57,921 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:17:57,921 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:17:57,921 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:17:57,922 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:17:57,922 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:17:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-21 12:17:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 12:17:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:58,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:17:58,009 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-21 12:17:58,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:58,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596868740] [2020-07-21 12:17:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:17:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:59,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:59,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596868740] [2020-07-21 12:17:59,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:59,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:17:59,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513885996] [2020-07-21 12:17:59,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:17:59,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:17:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:17:59,504 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-21 12:18:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:00,021 INFO L93 Difference]: Finished difference Result 4028 states and 7284 transitions. [2020-07-21 12:18:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:18:00,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 12:18:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:00,064 INFO L225 Difference]: With dead ends: 4028 [2020-07-21 12:18:00,064 INFO L226 Difference]: Without dead ends: 2704 [2020-07-21 12:18:00,079 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 [2020-07-21 12:18:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2020-07-21 12:18:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2647. [2020-07-21 12:18:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-07-21 12:18:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4323 transitions. [2020-07-21 12:18:00,320 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4323 transitions. Word has length 473 [2020-07-21 12:18:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:00,326 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4323 transitions. [2020-07-21 12:18:00,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:18:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4323 transitions. [2020-07-21 12:18:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 12:18:00,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:00,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:00,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:00,561 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash 339011516, now seen corresponding path program 1 times [2020-07-21 12:18:00,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:00,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162023814] [2020-07-21 12:18:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:01,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:01,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162023814] [2020-07-21 12:18:01,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:01,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:01,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515833774] [2020-07-21 12:18:01,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:01,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:01,385 INFO L87 Difference]: Start difference. First operand 2647 states and 4323 transitions. Second operand 3 states. [2020-07-21 12:18:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:01,692 INFO L93 Difference]: Finished difference Result 7627 states and 12403 transitions. [2020-07-21 12:18:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:01,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 12:18:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:01,721 INFO L225 Difference]: With dead ends: 7627 [2020-07-21 12:18:01,721 INFO L226 Difference]: Without dead ends: 5145 [2020-07-21 12:18:01,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2020-07-21 12:18:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 5088. [2020-07-21 12:18:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5088 states. [2020-07-21 12:18:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 8265 transitions. [2020-07-21 12:18:01,970 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 8265 transitions. Word has length 475 [2020-07-21 12:18:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:01,972 INFO L479 AbstractCegarLoop]: Abstraction has 5088 states and 8265 transitions. [2020-07-21 12:18:01,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 8265 transitions. [2020-07-21 12:18:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 12:18:01,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:01,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:02,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:02,211 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1481331460, now seen corresponding path program 1 times [2020-07-21 12:18:02,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:02,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376398264] [2020-07-21 12:18:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:02,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:02,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:02,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376398264] [2020-07-21 12:18:02,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:02,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:02,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080276233] [2020-07-21 12:18:02,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:02,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:02,888 INFO L87 Difference]: Start difference. First operand 5088 states and 8265 transitions. Second operand 3 states. [2020-07-21 12:18:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:03,236 INFO L93 Difference]: Finished difference Result 14492 states and 23381 transitions. [2020-07-21 12:18:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:03,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 12:18:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:03,283 INFO L225 Difference]: With dead ends: 14492 [2020-07-21 12:18:03,283 INFO L226 Difference]: Without dead ends: 9793 [2020-07-21 12:18:03,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9793 states. [2020-07-21 12:18:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9793 to 5140. [2020-07-21 12:18:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5140 states. [2020-07-21 12:18:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 8345 transitions. [2020-07-21 12:18:03,552 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 8345 transitions. Word has length 476 [2020-07-21 12:18:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:03,552 INFO L479 AbstractCegarLoop]: Abstraction has 5140 states and 8345 transitions. [2020-07-21 12:18:03,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 8345 transitions. [2020-07-21 12:18:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 12:18:03,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:03,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:03,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:03,793 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1284388703, now seen corresponding path program 1 times [2020-07-21 12:18:03,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:03,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714406881] [2020-07-21 12:18:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 2917 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:04,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:04,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:04,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714406881] [2020-07-21 12:18:04,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:04,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:04,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077774538] [2020-07-21 12:18:04,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:04,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:04,511 INFO L87 Difference]: Start difference. First operand 5140 states and 8345 transitions. Second operand 3 states. [2020-07-21 12:18:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:04,900 INFO L93 Difference]: Finished difference Result 15000 states and 24286 transitions. [2020-07-21 12:18:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:04,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2020-07-21 12:18:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:04,947 INFO L225 Difference]: With dead ends: 15000 [2020-07-21 12:18:04,947 INFO L226 Difference]: Without dead ends: 10091 [2020-07-21 12:18:04,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10091 states. [2020-07-21 12:18:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10091 to 10034. [2020-07-21 12:18:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10034 states. [2020-07-21 12:18:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10034 states to 10034 states and 16216 transitions. [2020-07-21 12:18:05,302 INFO L78 Accepts]: Start accepts. Automaton has 10034 states and 16216 transitions. Word has length 477 [2020-07-21 12:18:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:05,303 INFO L479 AbstractCegarLoop]: Abstraction has 10034 states and 16216 transitions. [2020-07-21 12:18:05,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10034 states and 16216 transitions. [2020-07-21 12:18:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 12:18:05,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:05,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:05,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:05,544 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:05,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1744646596, now seen corresponding path program 1 times [2020-07-21 12:18:05,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:05,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177006873] [2020-07-21 12:18:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:06,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:06,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177006873] [2020-07-21 12:18:06,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:06,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:06,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39957710] [2020-07-21 12:18:06,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:06,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:06,223 INFO L87 Difference]: Start difference. First operand 10034 states and 16216 transitions. Second operand 3 states. [2020-07-21 12:18:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:06,805 INFO L93 Difference]: Finished difference Result 28642 states and 46004 transitions. [2020-07-21 12:18:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:06,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2020-07-21 12:18:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:06,847 INFO L225 Difference]: With dead ends: 28642 [2020-07-21 12:18:06,848 INFO L226 Difference]: Without dead ends: 19345 [2020-07-21 12:18:06,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19345 states. [2020-07-21 12:18:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19345 to 10192. [2020-07-21 12:18:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10192 states. [2020-07-21 12:18:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10192 states to 10192 states and 16454 transitions. [2020-07-21 12:18:07,304 INFO L78 Accepts]: Start accepts. Automaton has 10192 states and 16454 transitions. Word has length 477 [2020-07-21 12:18:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:07,305 INFO L479 AbstractCegarLoop]: Abstraction has 10192 states and 16454 transitions. [2020-07-21 12:18:07,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 10192 states and 16454 transitions. [2020-07-21 12:18:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 12:18:07,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:07,327 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] [2020-07-21 12:18:07,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:07,542 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1622315691, now seen corresponding path program 1 times [2020-07-21 12:18:07,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:07,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100681699] [2020-07-21 12:18:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:08,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:08,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:08,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100681699] [2020-07-21 12:18:08,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:08,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:08,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551705131] [2020-07-21 12:18:08,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:08,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:08,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:08,239 INFO L87 Difference]: Start difference. First operand 10192 states and 16454 transitions. Second operand 3 states. [2020-07-21 12:18:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:08,747 INFO L93 Difference]: Finished difference Result 28856 states and 46283 transitions. [2020-07-21 12:18:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:08,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 12:18:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:08,780 INFO L225 Difference]: With dead ends: 28856 [2020-07-21 12:18:08,780 INFO L226 Difference]: Without dead ends: 19535 [2020-07-21 12:18:08,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19535 states. [2020-07-21 12:18:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19535 to 10382. [2020-07-21 12:18:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10382 states. [2020-07-21 12:18:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10382 states to 10382 states and 16696 transitions. [2020-07-21 12:18:10,050 INFO L78 Accepts]: Start accepts. Automaton has 10382 states and 16696 transitions. Word has length 478 [2020-07-21 12:18:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:10,051 INFO L479 AbstractCegarLoop]: Abstraction has 10382 states and 16696 transitions. [2020-07-21 12:18:10,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 10382 states and 16696 transitions. [2020-07-21 12:18:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 12:18:10,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:10,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:10,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:10,283 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:10,283 INFO L82 PathProgramCache]: Analyzing trace with hash -916095642, now seen corresponding path program 1 times [2020-07-21 12:18:10,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:10,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846786569] [2020-07-21 12:18:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:10,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:10,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846786569] [2020-07-21 12:18:10,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:10,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:10,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098145452] [2020-07-21 12:18:10,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:10,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:10,919 INFO L87 Difference]: Start difference. First operand 10382 states and 16696 transitions. Second operand 3 states. [2020-07-21 12:18:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:11,468 INFO L93 Difference]: Finished difference Result 30381 states and 48738 transitions. [2020-07-21 12:18:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:11,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 12:18:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:11,497 INFO L225 Difference]: With dead ends: 30381 [2020-07-21 12:18:11,497 INFO L226 Difference]: Without dead ends: 20373 [2020-07-21 12:18:11,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20373 states. [2020-07-21 12:18:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20373 to 20316. [2020-07-21 12:18:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20316 states. [2020-07-21 12:18:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20316 states to 20316 states and 32507 transitions. [2020-07-21 12:18:12,125 INFO L78 Accepts]: Start accepts. Automaton has 20316 states and 32507 transitions. Word has length 479 [2020-07-21 12:18:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:12,126 INFO L479 AbstractCegarLoop]: Abstraction has 20316 states and 32507 transitions. [2020-07-21 12:18:12,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 20316 states and 32507 transitions. [2020-07-21 12:18:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 12:18:12,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:12,160 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] [2020-07-21 12:18:12,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:12,376 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1111574185, now seen corresponding path program 1 times [2020-07-21 12:18:12,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:12,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294869941] [2020-07-21 12:18:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:18:12,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:13,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:13,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294869941] [2020-07-21 12:18:13,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:13,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:18:13,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282284758] [2020-07-21 12:18:13,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:18:13,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:18:13,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:18:13,236 INFO L87 Difference]: Start difference. First operand 20316 states and 32507 transitions. Second operand 4 states. [2020-07-21 12:18:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:14,951 INFO L93 Difference]: Finished difference Result 53579 states and 84878 transitions. [2020-07-21 12:18:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:18:14,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 12:18:14,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:14,992 INFO L225 Difference]: With dead ends: 53579 [2020-07-21 12:18:14,993 INFO L226 Difference]: Without dead ends: 37666 [2020-07-21 12:18:15,021 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 [2020-07-21 12:18:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37666 states. [2020-07-21 12:18:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37666 to 23004. [2020-07-21 12:18:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23004 states. [2020-07-21 12:18:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 37196 transitions. [2020-07-21 12:18:15,845 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 37196 transitions. Word has length 479 [2020-07-21 12:18:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:15,845 INFO L479 AbstractCegarLoop]: Abstraction has 23004 states and 37196 transitions. [2020-07-21 12:18:15,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:18:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 37196 transitions. [2020-07-21 12:18:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 12:18:15,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:15,870 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] [2020-07-21 12:18:16,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:16,071 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1521048497, now seen corresponding path program 1 times [2020-07-21 12:18:16,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:16,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314173837] [2020-07-21 12:18:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:16,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:16,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:16,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314173837] [2020-07-21 12:18:16,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:16,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:16,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475591060] [2020-07-21 12:18:16,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:16,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:16,821 INFO L87 Difference]: Start difference. First operand 23004 states and 37196 transitions. Second operand 3 states. [2020-07-21 12:18:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:18,371 INFO L93 Difference]: Finished difference Result 54945 states and 86965 transitions. [2020-07-21 12:18:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:18,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 12:18:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:18,417 INFO L225 Difference]: With dead ends: 54945 [2020-07-21 12:18:18,418 INFO L226 Difference]: Without dead ends: 39012 [2020-07-21 12:18:18,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39012 states. [2020-07-21 12:18:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39012 to 23451. [2020-07-21 12:18:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23451 states. [2020-07-21 12:18:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 37871 transitions. [2020-07-21 12:18:19,239 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 37871 transitions. Word has length 482 [2020-07-21 12:18:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:19,239 INFO L479 AbstractCegarLoop]: Abstraction has 23451 states and 37871 transitions. [2020-07-21 12:18:19,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 37871 transitions. [2020-07-21 12:18:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 12:18:19,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:19,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:19,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:19,465 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1865472944, now seen corresponding path program 1 times [2020-07-21 12:18:19,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:19,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551007213] [2020-07-21 12:18:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2929 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:20,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:20,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551007213] [2020-07-21 12:18:20,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:20,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:20,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562195199] [2020-07-21 12:18:20,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:20,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:20,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:20,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:20,056 INFO L87 Difference]: Start difference. First operand 23451 states and 37871 transitions. Second operand 3 states. [2020-07-21 12:18:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:21,127 INFO L93 Difference]: Finished difference Result 55674 states and 88014 transitions. [2020-07-21 12:18:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:21,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 12:18:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:21,166 INFO L225 Difference]: With dead ends: 55674 [2020-07-21 12:18:21,166 INFO L226 Difference]: Without dead ends: 39627 [2020-07-21 12:18:21,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39627 states. [2020-07-21 12:18:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39627 to 24098. [2020-07-21 12:18:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24098 states. [2020-07-21 12:18:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24098 states to 24098 states and 38811 transitions. [2020-07-21 12:18:22,170 INFO L78 Accepts]: Start accepts. Automaton has 24098 states and 38811 transitions. Word has length 483 [2020-07-21 12:18:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:22,170 INFO L479 AbstractCegarLoop]: Abstraction has 24098 states and 38811 transitions. [2020-07-21 12:18:22,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 24098 states and 38811 transitions. [2020-07-21 12:18:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 12:18:22,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:22,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:22,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:22,402 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2139647005, now seen corresponding path program 1 times [2020-07-21 12:18:22,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:22,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617380098] [2020-07-21 12:18:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2930 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:22,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:23,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:23,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617380098] [2020-07-21 12:18:23,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:23,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:23,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474785290] [2020-07-21 12:18:23,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:23,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:23,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:23,067 INFO L87 Difference]: Start difference. First operand 24098 states and 38811 transitions. Second operand 3 states. [2020-07-21 12:18:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:24,839 INFO L93 Difference]: Finished difference Result 56586 states and 89198 transitions. [2020-07-21 12:18:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:24,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 12:18:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:24,874 INFO L225 Difference]: With dead ends: 56586 [2020-07-21 12:18:24,875 INFO L226 Difference]: Without dead ends: 40481 [2020-07-21 12:18:24,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40481 states. [2020-07-21 12:18:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40481 to 24952. [2020-07-21 12:18:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24952 states. [2020-07-21 12:18:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24952 states to 24952 states and 39873 transitions. [2020-07-21 12:18:25,766 INFO L78 Accepts]: Start accepts. Automaton has 24952 states and 39873 transitions. Word has length 484 [2020-07-21 12:18:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:25,766 INFO L479 AbstractCegarLoop]: Abstraction has 24952 states and 39873 transitions. [2020-07-21 12:18:25,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24952 states and 39873 transitions. [2020-07-21 12:18:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 12:18:25,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:25,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:26,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:26,006 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:26,007 INFO L82 PathProgramCache]: Analyzing trace with hash -362148267, now seen corresponding path program 1 times [2020-07-21 12:18:26,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:26,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886770922] [2020-07-21 12:18:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2941 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:18:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:26,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:26,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886770922] [2020-07-21 12:18:26,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:26,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:18:26,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047805272] [2020-07-21 12:18:26,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:18:26,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:18:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:18:26,856 INFO L87 Difference]: Start difference. First operand 24952 states and 39873 transitions. Second operand 4 states. [2020-07-21 12:18:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:28,719 INFO L93 Difference]: Finished difference Result 73898 states and 118005 transitions. [2020-07-21 12:18:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:18:28,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 12:18:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:28,762 INFO L225 Difference]: With dead ends: 73898 [2020-07-21 12:18:28,762 INFO L226 Difference]: Without dead ends: 49111 [2020-07-21 12:18:28,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:18:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49111 states. [2020-07-21 12:18:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49111 to 49060. [2020-07-21 12:18:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49060 states. [2020-07-21 12:18:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49060 states to 49060 states and 77991 transitions. [2020-07-21 12:18:31,677 INFO L78 Accepts]: Start accepts. Automaton has 49060 states and 77991 transitions. Word has length 485 [2020-07-21 12:18:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:31,678 INFO L479 AbstractCegarLoop]: Abstraction has 49060 states and 77991 transitions. [2020-07-21 12:18:31,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:18:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 49060 states and 77991 transitions. [2020-07-21 12:18:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:18:31,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:31,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:31,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:31,915 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash -412272428, now seen corresponding path program 1 times [2020-07-21 12:18:31,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:31,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822562330] [2020-07-21 12:18:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 2944 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:32,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:32,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822562330] [2020-07-21 12:18:32,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:32,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:32,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409964867] [2020-07-21 12:18:32,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:32,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:32,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:32,561 INFO L87 Difference]: Start difference. First operand 49060 states and 77991 transitions. Second operand 3 states. [2020-07-21 12:18:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:35,856 INFO L93 Difference]: Finished difference Result 144777 states and 229911 transitions. [2020-07-21 12:18:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:35,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 12:18:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:35,950 INFO L225 Difference]: With dead ends: 144777 [2020-07-21 12:18:35,950 INFO L226 Difference]: Without dead ends: 96662 [2020-07-21 12:18:35,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96662 states. [2020-07-21 12:18:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96662 to 96608. [2020-07-21 12:18:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96608 states. [2020-07-21 12:18:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96608 states to 96608 states and 152849 transitions. [2020-07-21 12:18:41,591 INFO L78 Accepts]: Start accepts. Automaton has 96608 states and 152849 transitions. Word has length 487 [2020-07-21 12:18:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:41,591 INFO L479 AbstractCegarLoop]: Abstraction has 96608 states and 152849 transitions. [2020-07-21 12:18:41,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 96608 states and 152849 transitions. [2020-07-21 12:18:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 12:18:41,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:41,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:41,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:41,869 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash 999482083, now seen corresponding path program 1 times [2020-07-21 12:18:41,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:41,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109255354] [2020-07-21 12:18:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:42,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:42,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109255354] [2020-07-21 12:18:42,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:42,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:42,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301362837] [2020-07-21 12:18:42,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:42,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:42,454 INFO L87 Difference]: Start difference. First operand 96608 states and 152849 transitions. Second operand 3 states. [2020-07-21 12:18:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:51,541 INFO L93 Difference]: Finished difference Result 288371 states and 455963 transitions. [2020-07-21 12:18:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:51,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 12:18:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:51,730 INFO L225 Difference]: With dead ends: 288371 [2020-07-21 12:18:51,730 INFO L226 Difference]: Without dead ends: 192273 [2020-07-21 12:18:51,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192273 states. [2020-07-21 12:18:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192273 to 96808. [2020-07-21 12:18:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96808 states. [2020-07-21 12:18:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96808 states to 96808 states and 153143 transitions. [2020-07-21 12:18:55,960 INFO L78 Accepts]: Start accepts. Automaton has 96808 states and 153143 transitions. Word has length 488 [2020-07-21 12:18:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:55,960 INFO L479 AbstractCegarLoop]: Abstraction has 96808 states and 153143 transitions. [2020-07-21 12:18:55,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 96808 states and 153143 transitions. [2020-07-21 12:18:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 12:18:56,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:56,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:56,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:56,248 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1335144281, now seen corresponding path program 1 times [2020-07-21 12:18:56,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:56,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900583208] [2020-07-21 12:18:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 2947 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:57,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:57,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900583208] [2020-07-21 12:18:57,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:57,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:57,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867473783] [2020-07-21 12:18:57,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:57,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:57,220 INFO L87 Difference]: Start difference. First operand 96808 states and 153143 transitions. Second operand 3 states. [2020-07-21 12:19:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:06,095 INFO L93 Difference]: Finished difference Result 287850 states and 455147 transitions. [2020-07-21 12:19:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:19:06,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 12:19:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:06,299 INFO L225 Difference]: With dead ends: 287850 [2020-07-21 12:19:06,299 INFO L226 Difference]: Without dead ends: 192174 [2020-07-21 12:19:06,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192174 states. [2020-07-21 12:19:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192174 to 192125. [2020-07-21 12:19:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192125 states. [2020-07-21 12:19:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192125 states to 192125 states and 302630 transitions. [2020-07-21 12:19:15,243 INFO L78 Accepts]: Start accepts. Automaton has 192125 states and 302630 transitions. Word has length 489 [2020-07-21 12:19:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:15,243 INFO L479 AbstractCegarLoop]: Abstraction has 192125 states and 302630 transitions. [2020-07-21 12:19:15,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:19:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 192125 states and 302630 transitions. [2020-07-21 12:19:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 12:19:15,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:15,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:19:15,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:15,614 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash -95512268, now seen corresponding path program 1 times [2020-07-21 12:19:15,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:15,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112503046] [2020-07-21 12:19:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:19:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:19:16,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:19:16,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112503046] [2020-07-21 12:19:16,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:19:16,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:19:16,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37722881] [2020-07-21 12:19:16,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:19:16,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:19:16,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:16,195 INFO L87 Difference]: Start difference. First operand 192125 states and 302630 transitions. Second operand 3 states. [2020-07-21 12:19:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:34,479 INFO L93 Difference]: Finished difference Result 573827 states and 903462 transitions. [2020-07-21 12:19:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:19:34,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 12:19:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:34,887 INFO L225 Difference]: With dead ends: 573827 [2020-07-21 12:19:34,887 INFO L226 Difference]: Without dead ends: 382967 [2020-07-21 12:19:35,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382967 states. [2020-07-21 12:19:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382967 to 192793. [2020-07-21 12:19:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192793 states. [2020-07-21 12:19:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192793 states to 192793 states and 303604 transitions. [2020-07-21 12:19:52,023 INFO L78 Accepts]: Start accepts. Automaton has 192793 states and 303604 transitions. Word has length 489 [2020-07-21 12:19:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:52,023 INFO L479 AbstractCegarLoop]: Abstraction has 192793 states and 303604 transitions. [2020-07-21 12:19:52,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:19:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 192793 states and 303604 transitions. [2020-07-21 12:19:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 12:19:52,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:52,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:19:52,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:52,391 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:52,392 INFO L82 PathProgramCache]: Analyzing trace with hash -993288718, now seen corresponding path program 1 times [2020-07-21 12:19:52,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:52,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543622956] [2020-07-21 12:19:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:19:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:19:53,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:19:53,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543622956] [2020-07-21 12:19:53,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:19:53,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:19:53,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47398848] [2020-07-21 12:19:53,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:19:53,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:53,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:19:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:53,044 INFO L87 Difference]: Start difference. First operand 192793 states and 303604 transitions. Second operand 3 states. [2020-07-21 12:20:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:13,956 INFO L93 Difference]: Finished difference Result 574572 states and 904383 transitions. [2020-07-21 12:20:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:13,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 12:20:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:14,382 INFO L225 Difference]: With dead ends: 574572 [2020-07-21 12:20:14,382 INFO L226 Difference]: Without dead ends: 383763 [2020-07-21 12:20:14,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383763 states. [2020-07-21 12:20:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383763 to 193589. [2020-07-21 12:20:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193589 states. [2020-07-21 12:20:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193589 states to 193589 states and 304616 transitions. [2020-07-21 12:20:33,009 INFO L78 Accepts]: Start accepts. Automaton has 193589 states and 304616 transitions. Word has length 490 [2020-07-21 12:20:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:33,009 INFO L479 AbstractCegarLoop]: Abstraction has 193589 states and 304616 transitions. [2020-07-21 12:20:33,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 193589 states and 304616 transitions. [2020-07-21 12:20:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 12:20:33,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:33,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:20:33,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:33,374 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1720653378, now seen corresponding path program 1 times [2020-07-21 12:20:33,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:33,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380820046] [2020-07-21 12:20:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:20:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:34,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:34,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380820046] [2020-07-21 12:20:34,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:34,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:34,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299415820] [2020-07-21 12:20:34,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:34,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:34,064 INFO L87 Difference]: Start difference. First operand 193589 states and 304616 transitions. Second operand 3 states. [2020-07-21 12:20:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:56,783 INFO L93 Difference]: Finished difference Result 569913 states and 896437 transitions. [2020-07-21 12:20:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:56,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 12:20:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:57,225 INFO L225 Difference]: With dead ends: 569913 [2020-07-21 12:20:57,225 INFO L226 Difference]: Without dead ends: 382976 [2020-07-21 12:20:57,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382976 states. [2020-07-21 12:21:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382976 to 382929. [2020-07-21 12:21:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382929 states. [2020-07-21 12:21:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382929 states to 382929 states and 600149 transitions. [2020-07-21 12:21:25,649 INFO L78 Accepts]: Start accepts. Automaton has 382929 states and 600149 transitions. Word has length 491 [2020-07-21 12:21:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:25,650 INFO L479 AbstractCegarLoop]: Abstraction has 382929 states and 600149 transitions. [2020-07-21 12:21:25,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 382929 states and 600149 transitions. [2020-07-21 12:21:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 12:21:26,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:26,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:26,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:26,229 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash 216716609, now seen corresponding path program 1 times [2020-07-21 12:21:26,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:26,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222489523] [2020-07-21 12:21:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:21:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:26,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:26,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222489523] [2020-07-21 12:21:26,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:26,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:26,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786602404] [2020-07-21 12:21:26,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:26,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:26,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:26,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:26,839 INFO L87 Difference]: Start difference. First operand 382929 states and 600149 transitions. Second operand 4 states. [2020-07-21 12:22:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:17,624 INFO L93 Difference]: Finished difference Result 1043158 states and 1625859 transitions. [2020-07-21 12:22:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:22:17,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 12:22:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:18,554 INFO L225 Difference]: With dead ends: 1043158 [2020-07-21 12:22:18,554 INFO L226 Difference]: Without dead ends: 732306 [2020-07-21 12:22:18,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:22:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732306 states. [2020-07-21 12:22:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732306 to 451903. [2020-07-21 12:22:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451903 states. [2020-07-21 12:22:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451903 states to 451903 states and 715336 transitions. [2020-07-21 12:22:53,598 INFO L78 Accepts]: Start accepts. Automaton has 451903 states and 715336 transitions. Word has length 491 [2020-07-21 12:22:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:53,599 INFO L479 AbstractCegarLoop]: Abstraction has 451903 states and 715336 transitions. [2020-07-21 12:22:53,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:22:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 451903 states and 715336 transitions. [2020-07-21 12:22:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 12:22:54,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:54,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:54,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:54,301 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1952989886, now seen corresponding path program 1 times [2020-07-21 12:22:54,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:54,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128644227] [2020-07-21 12:22:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:54,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:54,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128644227] [2020-07-21 12:22:54,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:54,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:54,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047864794] [2020-07-21 12:22:54,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:54,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:54,905 INFO L87 Difference]: Start difference. First operand 451903 states and 715336 transitions. Second operand 3 states. [2020-07-21 12:23:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:45,550 INFO L93 Difference]: Finished difference Result 1080460 states and 1684421 transitions. [2020-07-21 12:23:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:45,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 12:23:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:46,542 INFO L225 Difference]: With dead ends: 1080460 [2020-07-21 12:23:46,543 INFO L226 Difference]: Without dead ends: 765670 [2020-07-21 12:23:46,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765670 states. [2020-07-21 12:24:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765670 to 465760. [2020-07-21 12:24:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465760 states. [2020-07-21 12:24:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465760 states to 465760 states and 735796 transitions. [2020-07-21 12:24:26,803 INFO L78 Accepts]: Start accepts. Automaton has 465760 states and 735796 transitions. Word has length 494 [2020-07-21 12:24:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:26,803 INFO L479 AbstractCegarLoop]: Abstraction has 465760 states and 735796 transitions. [2020-07-21 12:24:26,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:24:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 465760 states and 735796 transitions. [2020-07-21 12:24:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 12:24:27,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:27,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:27,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:27,552 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1669022976, now seen corresponding path program 1 times [2020-07-21 12:24:27,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:27,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074673924] [2020-07-21 12:24:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:28,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:28,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:28,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074673924] [2020-07-21 12:24:28,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:28,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:28,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458278049] [2020-07-21 12:24:28,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:28,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:28,999 INFO L87 Difference]: Start difference. First operand 465760 states and 735796 transitions. Second operand 3 states. [2020-07-21 12:25:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:21,382 INFO L93 Difference]: Finished difference Result 1104671 states and 1719110 transitions. [2020-07-21 12:25:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:25:21,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 12:25:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:22,456 INFO L225 Difference]: With dead ends: 1104671 [2020-07-21 12:25:22,456 INFO L226 Difference]: Without dead ends: 783309 [2020-07-21 12:25:23,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783309 states. [2020-07-21 12:26:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783309 to 485817. [2020-07-21 12:26:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485817 states. [2020-07-21 12:26:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485817 states to 485817 states and 764192 transitions. [2020-07-21 12:26:04,732 INFO L78 Accepts]: Start accepts. Automaton has 485817 states and 764192 transitions. Word has length 495 [2020-07-21 12:26:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:04,732 INFO L479 AbstractCegarLoop]: Abstraction has 485817 states and 764192 transitions. [2020-07-21 12:26:04,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 485817 states and 764192 transitions. [2020-07-21 12:26:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 12:26:05,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:05,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:05,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:05,455 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1983402354, now seen corresponding path program 1 times [2020-07-21 12:26:05,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:05,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928839636] [2020-07-21 12:26:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:05,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2960 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:06,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:06,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928839636] [2020-07-21 12:26:06,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:06,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:06,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756853140] [2020-07-21 12:26:06,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:06,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:06,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:06,969 INFO L87 Difference]: Start difference. First operand 485817 states and 764192 transitions. Second operand 3 states. [2020-07-21 12:27:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:03,435 INFO L93 Difference]: Finished difference Result 1136325 states and 1760992 transitions. [2020-07-21 12:27:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:03,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 12:27:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:04,598 INFO L225 Difference]: With dead ends: 1136325 [2020-07-21 12:27:04,598 INFO L226 Difference]: Without dead ends: 814048 [2020-07-21 12:27:04,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814048 states. [2020-07-21 12:27:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814048 to 516556. [2020-07-21 12:27:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516556 states. [2020-07-21 12:27:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516556 states to 516556 states and 803821 transitions. [2020-07-21 12:27:51,744 INFO L78 Accepts]: Start accepts. Automaton has 516556 states and 803821 transitions. Word has length 496 [2020-07-21 12:27:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:51,744 INFO L479 AbstractCegarLoop]: Abstraction has 516556 states and 803821 transitions. [2020-07-21 12:27:51,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 516556 states and 803821 transitions. [2020-07-21 12:27:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 12:27:52,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:52,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:52,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:52,500 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1501263731, now seen corresponding path program 1 times [2020-07-21 12:27:52,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:52,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816823999] [2020-07-21 12:27:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2961 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:27:52,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:27:53,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:53,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816823999] [2020-07-21 12:27:53,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:53,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:27:53,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824321870] [2020-07-21 12:27:53,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:27:53,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:27:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:27:53,093 INFO L87 Difference]: Start difference. First operand 516556 states and 803821 transitions. Second operand 4 states. [2020-07-21 12:28:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:53,208 INFO L93 Difference]: Finished difference Result 1037379 states and 1594343 transitions. [2020-07-21 12:28:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:28:53,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-21 12:28:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:54,318 INFO L225 Difference]: With dead ends: 1037379 [2020-07-21 12:28:54,319 INFO L226 Difference]: Without dead ends: 817607 [2020-07-21 12:28:54,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:28:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817607 states.