/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:07:59,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:07:59,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:07:59,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 02:07:59,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 02:07:59,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 02:07:59,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 02:07:59,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 02:07:59,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 02:07:59,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 02:07:59,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 02:07:59,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 02:07:59,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:07:59,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:07:59,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:07:59,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:07:59,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:07:59,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:07:59,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:07:59,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:07:59,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:07:59,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:07:59,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:07:59,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:07:59,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:07:59,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:07:59,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:07:59,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:07:59,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 02:07:59,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:07:59,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:07:59,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:07:59,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:07:59,799 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:07:59,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:07:59,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:07:59,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:07:59,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:07:59,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:07:59,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:07:59,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:07:59,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:07:59,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:07:59,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:07:59,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:07:59,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:07:59,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:07:59,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:07:59,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:07:59,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:07:59,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:07:59,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:07:59,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:07:59,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:07:59,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:07:59,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:07:59,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:07:59,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:07:59,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 02:08:00,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:08:00,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:08:00,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:08:00,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:08:00,112 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:08:00,114 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 02:08:00,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d222862c9/5dd068e927e14f4fb43e8a8ac859a85f/FLAG7ab22a5db [2020-07-20 02:08:00,880 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:08:00,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 02:08:00,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d222862c9/5dd068e927e14f4fb43e8a8ac859a85f/FLAG7ab22a5db [2020-07-20 02:08:01,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d222862c9/5dd068e927e14f4fb43e8a8ac859a85f [2020-07-20 02:08:01,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:08:01,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:08:01,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:08:01,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:08:01,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:08:01,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:08:01" (1/1) ... [2020-07-20 02:08:01,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5cf44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:01, skipping insertion in model container [2020-07-20 02:08:01,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:08:01" (1/1) ... [2020-07-20 02:08:01,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:08:01,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:08:02,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:08:02,870 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:08:03,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:08:03,913 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:08:03,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03 WrapperNode [2020-07-20 02:08:03,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:08:03,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:08:03,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:08:03,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:08:03,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:03,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:03,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:03,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:04,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:04,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:04,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... [2020-07-20 02:08:04,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:08:04,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:08:04,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:08:04,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:08:04,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:08:04,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:08:04,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:08:04,188 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:08:04,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:08:04,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:08:04,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 02:08:04,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 02:08:04,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 02:08:04,190 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 02:08:04,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:08:04,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:08:04,192 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 02:08:04,192 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 02:08:04,192 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 02:08:04,193 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 02:08:04,193 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 02:08:04,194 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 02:08:04,194 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 02:08:04,194 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 02:08:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 02:08:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:08:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:08:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:08:07,905 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:08:07,906 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 02:08:07,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:08:07 BoogieIcfgContainer [2020-07-20 02:08:07,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:08:07,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:08:07,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:08:07,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:08:07,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:08:01" (1/3) ... [2020-07-20 02:08:07,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db566f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:08:07, skipping insertion in model container [2020-07-20 02:08:07,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:08:03" (2/3) ... [2020-07-20 02:08:07,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db566f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:08:07, skipping insertion in model container [2020-07-20 02:08:07,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:08:07" (3/3) ... [2020-07-20 02:08:07,931 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 02:08:07,943 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:08:07,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:08:07,969 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:08:07,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:08:07,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:08:07,999 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:08:07,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:08:07,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:08:07,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:08:07,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:08:07,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:08:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-20 02:08:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 02:08:08,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:08,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:08,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:08,090 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-20 02:08:08,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:08,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406862454] [2020-07-20 02:08:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:08:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:10,637 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:08:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:08:10,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406862454] [2020-07-20 02:08:10,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:08:10,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:08:10,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600315515] [2020-07-20 02:08:10,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:08:10,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:10,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:08:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:08:10,906 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-07-20 02:08:11,694 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-07-20 02:08:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:20,947 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-07-20 02:08:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:08:20,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-20 02:08:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:20,985 INFO L225 Difference]: With dead ends: 2262 [2020-07-20 02:08:20,985 INFO L226 Difference]: Without dead ends: 1993 [2020-07-20 02:08:20,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:08:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-07-20 02:08:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-07-20 02:08:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-07-20 02:08:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-07-20 02:08:21,163 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-07-20 02:08:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:21,166 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-07-20 02:08:21,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:08:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-07-20 02:08:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 02:08:21,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:21,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:21,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:08:21,185 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-07-20 02:08:21,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:21,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941264966] [2020-07-20 02:08:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:08:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:23,263 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:08:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:08:24,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941264966] [2020-07-20 02:08:24,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:08:24,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:08:24,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813411135] [2020-07-20 02:08:24,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:08:24,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:08:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:08:24,051 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-07-20 02:08:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:38,384 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-07-20 02:08:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:08:38,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-20 02:08:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:38,409 INFO L225 Difference]: With dead ends: 5904 [2020-07-20 02:08:38,409 INFO L226 Difference]: Without dead ends: 3930 [2020-07-20 02:08:38,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:08:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-07-20 02:08:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-07-20 02:08:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-07-20 02:08:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-07-20 02:08:38,616 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-07-20 02:08:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:38,617 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-07-20 02:08:38,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:08:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-07-20 02:08:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 02:08:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:38,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:38,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 02:08:38,631 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:38,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-20 02:08:38,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:38,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27835145] [2020-07-20 02:08:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:08:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:39,875 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:08:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:08:40,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27835145] [2020-07-20 02:08:40,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:08:40,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:08:40,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682309117] [2020-07-20 02:08:40,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:08:40,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:08:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:08:40,198 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-07-20 02:08:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:56,114 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-07-20 02:08:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:08:56,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-20 02:08:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:56,152 INFO L225 Difference]: With dead ends: 11482 [2020-07-20 02:08:56,152 INFO L226 Difference]: Without dead ends: 7768 [2020-07-20 02:08:56,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:08:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-07-20 02:08:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-07-20 02:08:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-07-20 02:08:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-07-20 02:08:56,466 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-07-20 02:08:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:56,467 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-07-20 02:08:56,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:08:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-07-20 02:08:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 02:08:56,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:56,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:56,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 02:08:56,487 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-20 02:08:56,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:56,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948296438] [2020-07-20 02:08:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:08:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:57,349 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:08:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:08:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:08:57,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948296438] [2020-07-20 02:08:57,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:08:57,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:08:57,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844904063] [2020-07-20 02:08:57,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:08:57,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:57,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:08:57,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:08:57,565 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states. [2020-07-20 02:09:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:14,206 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-07-20 02:09:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:09:14,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-20 02:09:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:14,263 INFO L225 Difference]: With dead ends: 23201 [2020-07-20 02:09:14,264 INFO L226 Difference]: Without dead ends: 15487 [2020-07-20 02:09:14,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:09:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-07-20 02:09:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-07-20 02:09:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-07-20 02:09:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-07-20 02:09:14,814 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-07-20 02:09:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:14,815 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-07-20 02:09:14,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:09:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-07-20 02:09:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 02:09:14,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:14,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:09:14,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 02:09:14,835 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:14,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-20 02:09:14,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:14,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077797330] [2020-07-20 02:09:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:09:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:09:15,947 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:09:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:09:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:09:16,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077797330] [2020-07-20 02:09:16,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:09:16,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:09:16,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756066791] [2020-07-20 02:09:16,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:09:16,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:09:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:09:16,349 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-07-20 02:09:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:33,626 INFO L93 Difference]: Finished difference Result 22716 states and 36476 transitions. [2020-07-20 02:09:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:09:33,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 02:09:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:33,659 INFO L225 Difference]: With dead ends: 22716 [2020-07-20 02:09:33,660 INFO L226 Difference]: Without dead ends: 15302 [2020-07-20 02:09:33,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:09:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2020-07-20 02:09:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15300. [2020-07-20 02:09:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15300 states. [2020-07-20 02:09:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15300 states to 15300 states and 24521 transitions. [2020-07-20 02:09:34,282 INFO L78 Accepts]: Start accepts. Automaton has 15300 states and 24521 transitions. Word has length 480 [2020-07-20 02:09:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:34,282 INFO L479 AbstractCegarLoop]: Abstraction has 15300 states and 24521 transitions. [2020-07-20 02:09:34,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:09:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15300 states and 24521 transitions. [2020-07-20 02:09:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 02:09:34,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:34,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:09:34,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 02:09:34,318 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash -342175906, now seen corresponding path program 1 times [2020-07-20 02:09:34,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:34,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131506161] [2020-07-20 02:09:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:09:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:09:35,176 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:09:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:09:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:09:35,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131506161] [2020-07-20 02:09:35,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:09:35,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:09:35,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458743784] [2020-07-20 02:09:35,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:09:35,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:09:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:09:35,528 INFO L87 Difference]: Start difference. First operand 15300 states and 24521 transitions. Second operand 4 states. [2020-07-20 02:09:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:53,723 INFO L93 Difference]: Finished difference Result 45644 states and 73118 transitions. [2020-07-20 02:09:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:09:53,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 02:09:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:53,972 INFO L225 Difference]: With dead ends: 45644 [2020-07-20 02:09:53,972 INFO L226 Difference]: Without dead ends: 30488 [2020-07-20 02:09:53,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:09:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-07-20 02:09:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15398. [2020-07-20 02:09:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-07-20 02:09:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 24672 transitions. [2020-07-20 02:09:54,640 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 24672 transitions. Word has length 480 [2020-07-20 02:09:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:54,640 INFO L479 AbstractCegarLoop]: Abstraction has 15398 states and 24672 transitions. [2020-07-20 02:09:54,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:09:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 24672 transitions. [2020-07-20 02:09:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 02:09:54,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:54,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:09:54,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 02:09:54,674 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1081253375, now seen corresponding path program 1 times [2020-07-20 02:09:54,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:54,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113179426] [2020-07-20 02:09:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:09:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:09:55,557 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:09:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:09:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:09:55,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113179426] [2020-07-20 02:09:55,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:09:55,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:09:55,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127762294] [2020-07-20 02:09:55,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:09:55,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:09:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:09:55,776 INFO L87 Difference]: Start difference. First operand 15398 states and 24672 transitions. Second operand 4 states. [2020-07-20 02:10:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:14,933 INFO L93 Difference]: Finished difference Result 45779 states and 73299 transitions. [2020-07-20 02:10:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:10:14,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-20 02:10:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:14,982 INFO L225 Difference]: With dead ends: 45779 [2020-07-20 02:10:14,982 INFO L226 Difference]: Without dead ends: 30605 [2020-07-20 02:10:15,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:10:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-07-20 02:10:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15515. [2020-07-20 02:10:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2020-07-20 02:10:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 24818 transitions. [2020-07-20 02:10:15,707 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 24818 transitions. Word has length 481 [2020-07-20 02:10:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:15,708 INFO L479 AbstractCegarLoop]: Abstraction has 15515 states and 24818 transitions. [2020-07-20 02:10:15,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:10:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 24818 transitions. [2020-07-20 02:10:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 02:10:15,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:15,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:15,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 02:10:15,728 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1552601612, now seen corresponding path program 1 times [2020-07-20 02:10:15,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:15,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862251426] [2020-07-20 02:10:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:10:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:10:16,923 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:10:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:10:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:10:17,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862251426] [2020-07-20 02:10:17,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:10:17,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:10:17,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6071761] [2020-07-20 02:10:17,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:10:17,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:10:17,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:10:17,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:10:17,268 INFO L87 Difference]: Start difference. First operand 15515 states and 24818 transitions. Second operand 4 states. [2020-07-20 02:10:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:36,426 INFO L93 Difference]: Finished difference Result 44734 states and 71393 transitions. [2020-07-20 02:10:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:10:36,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-20 02:10:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:36,460 INFO L225 Difference]: With dead ends: 44734 [2020-07-20 02:10:36,460 INFO L226 Difference]: Without dead ends: 30188 [2020-07-20 02:10:36,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:10:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30188 states. [2020-07-20 02:10:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30188 to 30186. [2020-07-20 02:10:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2020-07-20 02:10:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 48059 transitions. [2020-07-20 02:10:38,564 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 48059 transitions. Word has length 482 [2020-07-20 02:10:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:38,565 INFO L479 AbstractCegarLoop]: Abstraction has 30186 states and 48059 transitions. [2020-07-20 02:10:38,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:10:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 48059 transitions. [2020-07-20 02:10:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 02:10:38,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:38,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:38,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 02:10:38,592 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104209, now seen corresponding path program 1 times [2020-07-20 02:10:38,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:38,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630884107] [2020-07-20 02:10:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:10:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:10:40,226 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:10:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:10:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:10:40,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630884107] [2020-07-20 02:10:40,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:10:40,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:10:40,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633654715] [2020-07-20 02:10:40,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:10:40,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:10:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:10:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:10:40,469 INFO L87 Difference]: Start difference. First operand 30186 states and 48059 transitions. Second operand 5 states. [2020-07-20 02:10:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:56,477 INFO L93 Difference]: Finished difference Result 67902 states and 108914 transitions. [2020-07-20 02:10:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:10:56,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 482 [2020-07-20 02:10:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:56,516 INFO L225 Difference]: With dead ends: 67902 [2020-07-20 02:10:56,517 INFO L226 Difference]: Without dead ends: 34534 [2020-07-20 02:10:56,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:10:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34534 states. [2020-07-20 02:10:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34534 to 34532. [2020-07-20 02:10:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34532 states. [2020-07-20 02:10:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34532 states to 34532 states and 55222 transitions. [2020-07-20 02:10:58,080 INFO L78 Accepts]: Start accepts. Automaton has 34532 states and 55222 transitions. Word has length 482 [2020-07-20 02:10:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:58,081 INFO L479 AbstractCegarLoop]: Abstraction has 34532 states and 55222 transitions. [2020-07-20 02:10:58,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:10:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 34532 states and 55222 transitions. [2020-07-20 02:10:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 02:10:58,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:58,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:58,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 02:10:58,123 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:58,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1612954702, now seen corresponding path program 1 times [2020-07-20 02:10:58,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:58,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707007153] [2020-07-20 02:10:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:10:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:10:59,252 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:10:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:10:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:10:59,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707007153] [2020-07-20 02:10:59,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:10:59,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:10:59,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552190559] [2020-07-20 02:10:59,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:10:59,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:10:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:10:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:10:59,662 INFO L87 Difference]: Start difference. First operand 34532 states and 55222 transitions. Second operand 4 states. [2020-07-20 02:11:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:21,571 INFO L93 Difference]: Finished difference Result 101493 states and 162313 transitions. [2020-07-20 02:11:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:11:21,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 02:11:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:21,642 INFO L225 Difference]: With dead ends: 101493 [2020-07-20 02:11:21,642 INFO L226 Difference]: Without dead ends: 67981 [2020-07-20 02:11:21,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:11:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67981 states. [2020-07-20 02:11:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67981 to 67979. [2020-07-20 02:11:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67979 states. [2020-07-20 02:11:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 108295 transitions. [2020-07-20 02:11:26,108 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 108295 transitions. Word has length 484 [2020-07-20 02:11:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:26,109 INFO L479 AbstractCegarLoop]: Abstraction has 67979 states and 108295 transitions. [2020-07-20 02:11:26,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:11:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 108295 transitions. [2020-07-20 02:11:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 02:11:26,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:26,180 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] [2020-07-20 02:11:26,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 02:11:26,180 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2030409168, now seen corresponding path program 1 times [2020-07-20 02:11:26,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:26,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616267371] [2020-07-20 02:11:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:11:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:11:27,077 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:11:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:11:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:11:27,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616267371] [2020-07-20 02:11:27,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:11:27,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:11:27,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306713019] [2020-07-20 02:11:27,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:11:27,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:27,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:11:27,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:11:27,218 INFO L87 Difference]: Start difference. First operand 67979 states and 108295 transitions. Second operand 4 states. [2020-07-20 02:11:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:43,480 INFO L93 Difference]: Finished difference Result 199189 states and 316915 transitions. [2020-07-20 02:11:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:11:43,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 02:11:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:43,622 INFO L225 Difference]: With dead ends: 199189 [2020-07-20 02:11:43,622 INFO L226 Difference]: Without dead ends: 133603 [2020-07-20 02:11:43,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:11:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133603 states. [2020-07-20 02:11:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133603 to 68369. [2020-07-20 02:11:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68369 states. [2020-07-20 02:11:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68369 states to 68369 states and 108871 transitions. [2020-07-20 02:11:47,432 INFO L78 Accepts]: Start accepts. Automaton has 68369 states and 108871 transitions. Word has length 485 [2020-07-20 02:11:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:47,432 INFO L479 AbstractCegarLoop]: Abstraction has 68369 states and 108871 transitions. [2020-07-20 02:11:47,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:11:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 68369 states and 108871 transitions. [2020-07-20 02:11:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 02:11:47,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:47,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:11:47,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 02:11:47,484 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1971007991, now seen corresponding path program 1 times [2020-07-20 02:11:47,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:47,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128411202] [2020-07-20 02:11:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:11:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:11:48,599 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:11:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:11:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:11:49,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128411202] [2020-07-20 02:11:49,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:11:49,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:11:49,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64905661] [2020-07-20 02:11:49,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:11:49,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:49,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:11:49,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:11:49,216 INFO L87 Difference]: Start difference. First operand 68369 states and 108871 transitions. Second operand 4 states. [2020-07-20 02:12:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:12:16,048 INFO L93 Difference]: Finished difference Result 200055 states and 318313 transitions. [2020-07-20 02:12:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:12:16,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-20 02:12:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:12:16,203 INFO L225 Difference]: With dead ends: 200055 [2020-07-20 02:12:16,203 INFO L226 Difference]: Without dead ends: 134536 [2020-07-20 02:12:16,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:12:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134536 states. [2020-07-20 02:12:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134536 to 134534. [2020-07-20 02:12:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134534 states. [2020-07-20 02:12:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134534 states to 134534 states and 213380 transitions. [2020-07-20 02:12:24,779 INFO L78 Accepts]: Start accepts. Automaton has 134534 states and 213380 transitions. Word has length 486 [2020-07-20 02:12:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:12:24,779 INFO L479 AbstractCegarLoop]: Abstraction has 134534 states and 213380 transitions. [2020-07-20 02:12:24,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:12:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 134534 states and 213380 transitions. [2020-07-20 02:12:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 02:12:24,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:12:24,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:12:24,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 02:12:24,894 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:12:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:12:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash -917079770, now seen corresponding path program 1 times [2020-07-20 02:12:24,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:12:24,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767602690] [2020-07-20 02:12:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:12:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:12:26,345 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:12:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:12:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:12:26,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767602690] [2020-07-20 02:12:26,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:12:26,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:12:26,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471873830] [2020-07-20 02:12:26,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:12:26,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:12:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:12:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:12:26,500 INFO L87 Difference]: Start difference. First operand 134534 states and 213380 transitions. Second operand 5 states. [2020-07-20 02:12:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:12:52,893 INFO L93 Difference]: Finished difference Result 312717 states and 499578 transitions. [2020-07-20 02:12:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:12:52,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-07-20 02:12:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:12:53,083 INFO L225 Difference]: With dead ends: 312717 [2020-07-20 02:12:53,083 INFO L226 Difference]: Without dead ends: 159955 [2020-07-20 02:12:53,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:12:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159955 states. [2020-07-20 02:13:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159955 to 159953. [2020-07-20 02:13:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159953 states. [2020-07-20 02:13:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159953 states to 159953 states and 254900 transitions. [2020-07-20 02:13:04,532 INFO L78 Accepts]: Start accepts. Automaton has 159953 states and 254900 transitions. Word has length 486 [2020-07-20 02:13:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:13:04,532 INFO L479 AbstractCegarLoop]: Abstraction has 159953 states and 254900 transitions. [2020-07-20 02:13:04,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:13:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 159953 states and 254900 transitions. [2020-07-20 02:13:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 02:13:04,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:04,666 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] [2020-07-20 02:13:04,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 02:13:04,667 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-20 02:13:04,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:04,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493868733] [2020-07-20 02:13:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:13:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:05,833 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:13:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:13:06,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493868733] [2020-07-20 02:13:06,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:13:06,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:13:06,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001850748] [2020-07-20 02:13:06,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:13:06,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:13:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:13:06,175 INFO L87 Difference]: Start difference. First operand 159953 states and 254900 transitions. Second operand 4 states. [2020-07-20 02:13:06,989 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2020-07-20 02:13:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:13:34,302 INFO L93 Difference]: Finished difference Result 332173 states and 515718 transitions. [2020-07-20 02:13:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:13:34,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 02:13:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:13:34,595 INFO L225 Difference]: With dead ends: 332173 [2020-07-20 02:13:34,595 INFO L226 Difference]: Without dead ends: 243475 [2020-07-20 02:13:34,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:13:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243475 states. [2020-07-20 02:13:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243475 to 243473. [2020-07-20 02:13:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243473 states. [2020-07-20 02:13:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243473 states to 243473 states and 379388 transitions. [2020-07-20 02:13:53,341 INFO L78 Accepts]: Start accepts. Automaton has 243473 states and 379388 transitions. Word has length 488 [2020-07-20 02:13:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:13:53,341 INFO L479 AbstractCegarLoop]: Abstraction has 243473 states and 379388 transitions. [2020-07-20 02:13:53,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:13:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 243473 states and 379388 transitions. [2020-07-20 02:13:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 02:13:53,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:53,560 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] [2020-07-20 02:13:53,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 02:13:53,560 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1358520816, now seen corresponding path program 1 times [2020-07-20 02:13:53,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:53,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074746507] [2020-07-20 02:13:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:13:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:55,594 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:13:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:13:59,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074746507] [2020-07-20 02:13:59,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:13:59,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-20 02:13:59,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504102117] [2020-07-20 02:13:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 02:13:59,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:59,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 02:13:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:13:59,113 INFO L87 Difference]: Start difference. First operand 243473 states and 379388 transitions. Second operand 18 states. [2020-07-20 02:14:00,268 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification that was a NOOP. DAG size: 425 [2020-07-20 02:14:13,224 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-07-20 02:14:19,674 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-07-20 02:15:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:03,016 INFO L93 Difference]: Finished difference Result 538745 states and 845384 transitions. [2020-07-20 02:15:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 02:15:03,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 488 [2020-07-20 02:15:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:03,656 INFO L225 Difference]: With dead ends: 538745 [2020-07-20 02:15:03,656 INFO L226 Difference]: Without dead ends: 508919 [2020-07-20 02:15:03,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=764, Invalid=1992, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 02:15:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508919 states. [2020-07-20 02:15:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508919 to 326929. [2020-07-20 02:15:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326929 states. [2020-07-20 02:15:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326929 states to 326929 states and 509404 transitions. [2020-07-20 02:15:38,653 INFO L78 Accepts]: Start accepts. Automaton has 326929 states and 509404 transitions. Word has length 488 [2020-07-20 02:15:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:38,654 INFO L479 AbstractCegarLoop]: Abstraction has 326929 states and 509404 transitions. [2020-07-20 02:15:38,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 02:15:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 326929 states and 509404 transitions. [2020-07-20 02:15:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 02:15:38,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:38,881 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] [2020-07-20 02:15:38,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 02:15:38,881 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -763957802, now seen corresponding path program 1 times [2020-07-20 02:15:38,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:38,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641518270] [2020-07-20 02:15:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:15:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:40,642 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:15:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:41,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641518270] [2020-07-20 02:15:41,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:41,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 02:15:41,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884538997] [2020-07-20 02:15:41,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:15:41,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:15:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:15:41,404 INFO L87 Difference]: Start difference. First operand 326929 states and 509404 transitions. Second operand 14 states. [2020-07-20 02:15:42,520 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 02:16:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:32,614 INFO L93 Difference]: Finished difference Result 432433 states and 671584 transitions. [2020-07-20 02:16:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:16:32,615 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-20 02:16:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:33,031 INFO L225 Difference]: With dead ends: 432433 [2020-07-20 02:16:33,031 INFO L226 Difference]: Without dead ends: 361487 [2020-07-20 02:16:38,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 02:16:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361487 states. [2020-07-20 02:16:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361487 to 255985. [2020-07-20 02:16:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255985 states. [2020-07-20 02:17:00,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255985 states to 255985 states and 397388 transitions. [2020-07-20 02:17:00,001 INFO L78 Accepts]: Start accepts. Automaton has 255985 states and 397388 transitions. Word has length 488 [2020-07-20 02:17:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:00,002 INFO L479 AbstractCegarLoop]: Abstraction has 255985 states and 397388 transitions. [2020-07-20 02:17:00,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:17:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 255985 states and 397388 transitions. [2020-07-20 02:17:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 02:17:00,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:00,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:00,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 02:17:00,221 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-20 02:17:00,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:00,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025913439] [2020-07-20 02:17:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:17:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:02,869 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:17:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:03,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025913439] [2020-07-20 02:17:03,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:03,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 02:17:03,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38368190] [2020-07-20 02:17:03,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:17:03,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:17:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:17:03,225 INFO L87 Difference]: Start difference. First operand 255985 states and 397388 transitions. Second operand 14 states. [2020-07-20 02:17:03,564 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 02:17:04,737 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 02:17:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:54,156 INFO L93 Difference]: Finished difference Result 375009 states and 584160 transitions. [2020-07-20 02:17:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:17:54,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-20 02:17:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:54,556 INFO L225 Difference]: With dead ends: 375009 [2020-07-20 02:17:54,556 INFO L226 Difference]: Without dead ends: 346767 [2020-07-20 02:17:54,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 02:17:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346767 states. [2020-07-20 02:18:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346767 to 266561. [2020-07-20 02:18:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266561 states. [2020-07-20 02:18:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266561 states to 266561 states and 412444 transitions. [2020-07-20 02:18:20,577 INFO L78 Accepts]: Start accepts. Automaton has 266561 states and 412444 transitions. Word has length 488 [2020-07-20 02:18:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:20,578 INFO L479 AbstractCegarLoop]: Abstraction has 266561 states and 412444 transitions. [2020-07-20 02:18:20,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:18:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 266561 states and 412444 transitions. [2020-07-20 02:18:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 02:18:20,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:20,803 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] [2020-07-20 02:18:20,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 02:18:20,804 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-20 02:18:20,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:20,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691477211] [2020-07-20 02:18:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4afa1e27 [2020-07-20 02:18:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:22,245 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 02:18:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:18:22,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691477211] [2020-07-20 02:18:22,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:22,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:18:22,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001838116] [2020-07-20 02:18:22,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:18:22,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:18:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:18:22,507 INFO L87 Difference]: Start difference. First operand 266561 states and 412444 transitions. Second operand 5 states. [2020-07-20 02:19:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:25,695 INFO L93 Difference]: Finished difference Result 782363 states and 1209659 transitions. [2020-07-20 02:19:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:19:25,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-07-20 02:19:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:26,330 INFO L225 Difference]: With dead ends: 782363 [2020-07-20 02:19:26,331 INFO L226 Difference]: Without dead ends: 520004 [2020-07-20 02:19:26,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:19:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520004 states.