/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 DAGSIZE --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.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:16:39,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:16:39,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:16:39,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:16:39,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:16:39,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:16:39,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:16:39,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:16:39,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:16:39,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:16:39,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:16:39,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:16:39,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:16:39,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:16:39,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:16:39,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:16:39,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:16:39,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:16:39,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:16:39,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:16:39,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:16:39,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:16:39,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:16:39,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:16:39,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:16:39,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:16:39,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:16:39,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:16:39,804 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 04:16:39,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:16:39,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:16:39,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:16:39,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:16:39,847 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:16:39,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:16:39,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:16:39,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:16:39,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:16:39,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:16:39,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:16:39,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:16:39,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:16:39,849 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:16:39,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:16:39,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:16:39,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:16:39,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:16:39,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:16:39,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:16:39,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:16:39,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:16:39,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:16:39,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:16:39,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:16:39,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:16:39,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:16:39,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:16:39,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:16:39,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 04:16:40,145 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:16:40,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:16:40,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:16:40,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:16:40,165 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:16:40,165 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 04:16:40,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76214ba6e/6044f29607b94f33a4563b1729f9793b/FLAGc46a6200b [2020-07-20 04:16:41,052 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:16:41,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 04:16:41,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76214ba6e/6044f29607b94f33a4563b1729f9793b/FLAGc46a6200b [2020-07-20 04:16:41,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76214ba6e/6044f29607b94f33a4563b1729f9793b [2020-07-20 04:16:41,163 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:16:41,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:16:41,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:16:41,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:16:41,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:16:41,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:16:41" (1/1) ... [2020-07-20 04:16:41,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de7f1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:41, skipping insertion in model container [2020-07-20 04:16:41,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:16:41" (1/1) ... [2020-07-20 04:16:41,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:16:41,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:16:42,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:16:42,946 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:16:44,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:16:44,608 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:16:44,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44 WrapperNode [2020-07-20 04:16:44,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:16:44,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:16:44,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:16:44,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:16:44,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (1/1) ... [2020-07-20 04:16:44,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:16:44,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:16:44,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:16:44,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:16:44,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (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 04:16:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:16:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:16:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:16:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:16:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:16:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 04:16:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 04:16:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 04:16:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:16:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:16:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 04:16:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 04:16:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 04:16:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 04:16:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 04:16:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 04:16:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 04:16:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 04:16:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 04:16:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:16:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:16:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:16:49,337 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:16:49,337 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 04:16:49,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:16:49 BoogieIcfgContainer [2020-07-20 04:16:49,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:16:49,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:16:49,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:16:49,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:16:49,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:16:41" (1/3) ... [2020-07-20 04:16:49,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebc3f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:16:49, skipping insertion in model container [2020-07-20 04:16:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:44" (2/3) ... [2020-07-20 04:16:49,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebc3f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:16:49, skipping insertion in model container [2020-07-20 04:16:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:16:49" (3/3) ... [2020-07-20 04:16:49,359 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 04:16:49,372 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:16:49,382 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 04:16:49,400 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 04:16:49,472 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:16:49,473 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:16:49,473 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:16:49,473 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:16:49,473 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:16:49,473 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:16:49,473 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:16:49,474 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:16:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-20 04:16:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 04:16:49,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:16:49,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:16:49,579 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:16:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:16:49,586 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-20 04:16:49,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:16:49,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609733501] [2020-07-20 04:16:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:16:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:16:53,426 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:16:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:16:53,813 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 04:16:53,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609733501] [2020-07-20 04:16:53,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:16:53,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:16:53,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908638311] [2020-07-20 04:16:53,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:16:53,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:16:53,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:16:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:16:53,842 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 5 states. [2020-07-20 04:17:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:12,640 INFO L93 Difference]: Finished difference Result 4059 states and 7350 transitions. [2020-07-20 04:17:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:17:12,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2020-07-20 04:17:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:12,694 INFO L225 Difference]: With dead ends: 4059 [2020-07-20 04:17:12,697 INFO L226 Difference]: Without dead ends: 2697 [2020-07-20 04:17:12,709 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 04:17:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-07-20 04:17:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2020-07-20 04:17:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-07-20 04:17:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions. [2020-07-20 04:17:12,970 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464 [2020-07-20 04:17:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:12,972 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions. [2020-07-20 04:17:12,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:17:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions. [2020-07-20 04:17:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-20 04:17:12,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:12,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:12,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 04:17:12,987 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:12,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1286826198, now seen corresponding path program 1 times [2020-07-20 04:17:12,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:12,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367472236] [2020-07-20 04:17:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:17:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:14,702 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:17:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:15,223 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 04:17:15,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367472236] [2020-07-20 04:17:15,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:15,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:17:15,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154177377] [2020-07-20 04:17:15,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:17:15,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:17:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:15,228 INFO L87 Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 4 states. [2020-07-20 04:17:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:34,673 INFO L93 Difference]: Finished difference Result 7670 states and 12560 transitions. [2020-07-20 04:17:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:17:34,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-07-20 04:17:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:34,705 INFO L225 Difference]: With dead ends: 7670 [2020-07-20 04:17:34,705 INFO L226 Difference]: Without dead ends: 5237 [2020-07-20 04:17:34,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2020-07-20 04:17:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2020-07-20 04:17:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2020-07-20 04:17:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions. [2020-07-20 04:17:34,913 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466 [2020-07-20 04:17:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:34,917 INFO L479 AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions. [2020-07-20 04:17:34,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:17:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions. [2020-07-20 04:17:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 04:17:34,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:34,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:34,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 04:17:34,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash -244647039, now seen corresponding path program 1 times [2020-07-20 04:17:34,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:34,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461291980] [2020-07-20 04:17:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:17:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:35,970 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:17:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:36,140 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 04:17:36,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461291980] [2020-07-20 04:17:36,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:36,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:17:36,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551751596] [2020-07-20 04:17:36,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:17:36,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:17:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:36,143 INFO L87 Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 4 states. [2020-07-20 04:17:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:55,100 INFO L93 Difference]: Finished difference Result 15470 states and 25323 transitions. [2020-07-20 04:17:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:17:55,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-20 04:17:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:55,151 INFO L225 Difference]: With dead ends: 15470 [2020-07-20 04:17:55,151 INFO L226 Difference]: Without dead ends: 10333 [2020-07-20 04:17:55,162 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 04:17:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10333 states. [2020-07-20 04:17:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236. [2020-07-20 04:17:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-07-20 04:17:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions. [2020-07-20 04:17:55,398 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467 [2020-07-20 04:17:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:55,399 INFO L479 AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions. [2020-07-20 04:17:55,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:17:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions. [2020-07-20 04:17:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 04:17:55,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:55,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:55,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 04:17:55,412 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash 536524677, now seen corresponding path program 1 times [2020-07-20 04:17:55,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:55,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199757478] [2020-07-20 04:17:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:17:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:56,561 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:17:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:57,068 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 04:17:57,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199757478] [2020-07-20 04:17:57,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:57,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:17:57,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730939808] [2020-07-20 04:17:57,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:17:57,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:57,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:17:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:57,073 INFO L87 Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 4 states. [2020-07-20 04:18:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:18:14,836 INFO L93 Difference]: Finished difference Result 15048 states and 24542 transitions. [2020-07-20 04:18:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:18:14,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-20 04:18:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:18:14,879 INFO L225 Difference]: With dead ends: 15048 [2020-07-20 04:18:14,880 INFO L226 Difference]: Without dead ends: 10211 [2020-07-20 04:18:14,891 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 04:18:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2020-07-20 04:18:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2020-07-20 04:18:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2020-07-20 04:18:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions. [2020-07-20 04:18:15,235 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468 [2020-07-20 04:18:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:18:15,236 INFO L479 AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions. [2020-07-20 04:18:15,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:18:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions. [2020-07-20 04:18:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 04:18:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:18:15,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:18:15,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 04:18:15,258 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:18:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:18:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1157993354, now seen corresponding path program 1 times [2020-07-20 04:18:15,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:18:15,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680766013] [2020-07-20 04:18:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:18:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:16,212 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:18:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:16,369 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 04:18:16,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680766013] [2020-07-20 04:18:16,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:18:16,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:18:16,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659341207] [2020-07-20 04:18:16,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:18:16,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:18:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:16,372 INFO L87 Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 4 states. [2020-07-20 04:18:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:18:34,623 INFO L93 Difference]: Finished difference Result 30239 states and 49226 transitions. [2020-07-20 04:18:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:18:34,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-20 04:18:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:18:34,665 INFO L225 Difference]: With dead ends: 30239 [2020-07-20 04:18:34,665 INFO L226 Difference]: Without dead ends: 20218 [2020-07-20 04:18:34,685 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 04:18:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2020-07-20 04:18:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 10263. [2020-07-20 04:18:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2020-07-20 04:18:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16708 transitions. [2020-07-20 04:18:35,119 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16708 transitions. Word has length 468 [2020-07-20 04:18:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:18:35,119 INFO L479 AbstractCegarLoop]: Abstraction has 10263 states and 16708 transitions. [2020-07-20 04:18:35,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:18:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16708 transitions. [2020-07-20 04:18:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 04:18:35,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:18:35,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:18:35,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 04:18:35,151 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:18:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:18:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 284183058, now seen corresponding path program 1 times [2020-07-20 04:18:35,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:18:35,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065101583] [2020-07-20 04:18:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:18:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:36,204 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:18:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:36,416 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 04:18:36,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065101583] [2020-07-20 04:18:36,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:18:36,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:18:36,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237089101] [2020-07-20 04:18:36,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:18:36,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:18:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:36,425 INFO L87 Difference]: Start difference. First operand 10263 states and 16708 transitions. Second operand 4 states. [2020-07-20 04:18:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:18:54,657 INFO L93 Difference]: Finished difference Result 30374 states and 49407 transitions. [2020-07-20 04:18:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:18:54,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-07-20 04:18:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:18:54,699 INFO L225 Difference]: With dead ends: 30374 [2020-07-20 04:18:54,700 INFO L226 Difference]: Without dead ends: 20335 [2020-07-20 04:18:54,719 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 04:18:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2020-07-20 04:18:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380. [2020-07-20 04:18:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2020-07-20 04:18:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions. [2020-07-20 04:18:55,160 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469 [2020-07-20 04:18:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:18:55,161 INFO L479 AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions. [2020-07-20 04:18:55,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:18:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions. [2020-07-20 04:18:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 04:18:55,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:18:55,193 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] [2020-07-20 04:18:55,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 04:18:55,193 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:18:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:18:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2073063424, now seen corresponding path program 1 times [2020-07-20 04:18:55,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:18:55,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7822607] [2020-07-20 04:18:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:18:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:56,350 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:18:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:56,595 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 04:18:56,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7822607] [2020-07-20 04:18:56,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:18:56,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:18:56,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366363038] [2020-07-20 04:18:56,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:18:56,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:56,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:18:56,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:56,598 INFO L87 Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 4 states. [2020-07-20 04:19:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:16,033 INFO L93 Difference]: Finished difference Result 29456 states and 47707 transitions. [2020-07-20 04:19:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:19:16,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-20 04:19:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:16,064 INFO L225 Difference]: With dead ends: 29456 [2020-07-20 04:19:16,064 INFO L226 Difference]: Without dead ends: 20045 [2020-07-20 04:19:16,080 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 04:19:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-07-20 04:19:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2020-07-20 04:19:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-07-20 04:19:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions. [2020-07-20 04:19:16,769 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470 [2020-07-20 04:19:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:19:16,770 INFO L479 AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions. [2020-07-20 04:19:16,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:19:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions. [2020-07-20 04:19:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 04:19:16,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:19:16,798 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] [2020-07-20 04:19:16,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 04:19:16,798 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:19:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:19:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1777003357, now seen corresponding path program 1 times [2020-07-20 04:19:16,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:19:16,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663160991] [2020-07-20 04:19:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:19:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:18,670 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:19:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:18,813 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 04:19:18,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663160991] [2020-07-20 04:19:18,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:19:18,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:19:18,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884594570] [2020-07-20 04:19:18,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:19:18,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:19:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:19:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:19:18,816 INFO L87 Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 5 states. [2020-07-20 04:19:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:34,082 INFO L93 Difference]: Finished difference Result 47599 states and 77546 transitions. [2020-07-20 04:19:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:19:34,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 470 [2020-07-20 04:19:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:34,116 INFO L225 Difference]: With dead ends: 47599 [2020-07-20 04:19:34,116 INFO L226 Difference]: Without dead ends: 24408 [2020-07-20 04:19:34,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:19:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2020-07-20 04:19:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 24355. [2020-07-20 04:19:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24355 states. [2020-07-20 04:19:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24355 states to 24355 states and 39550 transitions. [2020-07-20 04:19:36,187 INFO L78 Accepts]: Start accepts. Automaton has 24355 states and 39550 transitions. Word has length 470 [2020-07-20 04:19:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:19:36,187 INFO L479 AbstractCegarLoop]: Abstraction has 24355 states and 39550 transitions. [2020-07-20 04:19:36,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:19:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 24355 states and 39550 transitions. [2020-07-20 04:19:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 04:19:36,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:19:36,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:19:36,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 04:19:36,211 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:19:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:19:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1583646567, now seen corresponding path program 1 times [2020-07-20 04:19:36,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:19:36,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564033225] [2020-07-20 04:19:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:19:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:37,631 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:19:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:38,065 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 04:19:38,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564033225] [2020-07-20 04:19:38,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:19:38,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:19:38,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565329333] [2020-07-20 04:19:38,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:19:38,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:19:38,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:19:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:19:38,073 INFO L87 Difference]: Start difference. First operand 24355 states and 39550 transitions. Second operand 4 states. [2020-07-20 04:19:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:59,385 INFO L93 Difference]: Finished difference Result 71217 states and 115711 transitions. [2020-07-20 04:19:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:19:59,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-20 04:19:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:59,435 INFO L225 Difference]: With dead ends: 71217 [2020-07-20 04:19:59,435 INFO L226 Difference]: Without dead ends: 47882 [2020-07-20 04:19:59,455 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 04:19:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47882 states. [2020-07-20 04:20:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47882 to 47846. [2020-07-20 04:20:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47846 states. [2020-07-20 04:20:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47846 states to 47846 states and 77425 transitions. [2020-07-20 04:20:01,347 INFO L78 Accepts]: Start accepts. Automaton has 47846 states and 77425 transitions. Word has length 472 [2020-07-20 04:20:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:20:01,348 INFO L479 AbstractCegarLoop]: Abstraction has 47846 states and 77425 transitions. [2020-07-20 04:20:01,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:20:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 47846 states and 77425 transitions. [2020-07-20 04:20:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 04:20:01,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:20:01,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:20:01,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 04:20:01,391 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:20:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:20:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash 832056112, now seen corresponding path program 1 times [2020-07-20 04:20:01,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:20:01,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647937770] [2020-07-20 04:20:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:20:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:02,333 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:20:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:02,457 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 04:20:02,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647937770] [2020-07-20 04:20:02,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:20:02,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:20:02,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723346020] [2020-07-20 04:20:02,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:20:02,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:20:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:20:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:20:02,460 INFO L87 Difference]: Start difference. First operand 47846 states and 77425 transitions. Second operand 4 states. [2020-07-20 04:20:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:20:17,003 INFO L93 Difference]: Finished difference Result 138790 states and 224305 transitions. [2020-07-20 04:20:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:20:17,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 04:20:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:20:17,095 INFO L225 Difference]: With dead ends: 138790 [2020-07-20 04:20:17,095 INFO L226 Difference]: Without dead ends: 93337 [2020-07-20 04:20:17,135 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 04:20:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93337 states. [2020-07-20 04:20:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93337 to 48236. [2020-07-20 04:20:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48236 states. [2020-07-20 04:20:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48236 states to 48236 states and 78001 transitions. [2020-07-20 04:20:21,202 INFO L78 Accepts]: Start accepts. Automaton has 48236 states and 78001 transitions. Word has length 473 [2020-07-20 04:20:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:20:21,202 INFO L479 AbstractCegarLoop]: Abstraction has 48236 states and 78001 transitions. [2020-07-20 04:20:21,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:20:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 48236 states and 78001 transitions. [2020-07-20 04:20:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 04:20:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:20:21,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:20:21,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 04:20:21,257 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:20:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:20:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1772484418, now seen corresponding path program 1 times [2020-07-20 04:20:21,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:20:21,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274593775] [2020-07-20 04:20:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:20:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:22,494 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:20:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:20:22,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274593775] [2020-07-20 04:20:22,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:20:22,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:20:22,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607061016] [2020-07-20 04:20:22,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:20:22,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:20:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:20:22,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:20:22,796 INFO L87 Difference]: Start difference. First operand 48236 states and 78001 transitions. Second operand 4 states. [2020-07-20 04:20:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:20:46,046 INFO L93 Difference]: Finished difference Result 140167 states and 226533 transitions. [2020-07-20 04:20:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:20:46,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-20 04:20:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:20:46,142 INFO L225 Difference]: With dead ends: 140167 [2020-07-20 04:20:46,142 INFO L226 Difference]: Without dead ends: 94781 [2020-07-20 04:20:46,175 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 04:20:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94781 states. [2020-07-20 04:20:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94781 to 94747. [2020-07-20 04:20:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94747 states. [2020-07-20 04:20:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94747 states to 94747 states and 152646 transitions. [2020-07-20 04:20:50,582 INFO L78 Accepts]: Start accepts. Automaton has 94747 states and 152646 transitions. Word has length 474 [2020-07-20 04:20:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:20:50,583 INFO L479 AbstractCegarLoop]: Abstraction has 94747 states and 152646 transitions. [2020-07-20 04:20:50,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:20:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 94747 states and 152646 transitions. [2020-07-20 04:20:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 04:20:50,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:20:50,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:20:50,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 04:20:50,656 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:20:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:20:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash -869161505, now seen corresponding path program 1 times [2020-07-20 04:20:50,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:20:50,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786435939] [2020-07-20 04:20:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:20:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:52,230 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:20:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:52,382 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 04:20:52,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786435939] [2020-07-20 04:20:52,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:20:52,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:20:52,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315394067] [2020-07-20 04:20:52,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:20:52,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:20:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:20:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:20:52,384 INFO L87 Difference]: Start difference. First operand 94747 states and 152646 transitions. Second operand 5 states. [2020-07-20 04:21:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:21:16,185 INFO L93 Difference]: Finished difference Result 233316 states and 378328 transitions. [2020-07-20 04:21:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:21:16,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-07-20 04:21:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:21:16,323 INFO L225 Difference]: With dead ends: 233316 [2020-07-20 04:21:16,323 INFO L226 Difference]: Without dead ends: 120293 [2020-07-20 04:21:16,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:21:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120293 states. [2020-07-20 04:21:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120293 to 120214. [2020-07-20 04:21:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120214 states. [2020-07-20 04:21:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120214 states to 120214 states and 194430 transitions. [2020-07-20 04:21:23,627 INFO L78 Accepts]: Start accepts. Automaton has 120214 states and 194430 transitions. Word has length 474 [2020-07-20 04:21:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:21:23,627 INFO L479 AbstractCegarLoop]: Abstraction has 120214 states and 194430 transitions. [2020-07-20 04:21:23,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:21:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120214 states and 194430 transitions. [2020-07-20 04:21:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:21:23,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:21:23,724 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 04:21:23,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 04:21:23,725 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:21:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:21:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2045453381, now seen corresponding path program 1 times [2020-07-20 04:21:23,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:21:23,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573090640] [2020-07-20 04:21:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:21:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:21:24,991 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:21:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:21:25,547 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 04:21:25,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573090640] [2020-07-20 04:21:25,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:21:25,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:21:25,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635446738] [2020-07-20 04:21:25,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:21:25,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:21:25,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:21:25,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:21:25,549 INFO L87 Difference]: Start difference. First operand 120214 states and 194430 transitions. Second operand 6 states. [2020-07-20 04:21:26,390 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 399 [2020-07-20 04:21:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:21:47,105 INFO L93 Difference]: Finished difference Result 206583 states and 326042 transitions. [2020-07-20 04:21:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:21:47,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 476 [2020-07-20 04:21:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:21:47,266 INFO L225 Difference]: With dead ends: 206583 [2020-07-20 04:21:47,266 INFO L226 Difference]: Without dead ends: 157048 [2020-07-20 04:21:47,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 04:21:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157048 states. [2020-07-20 04:21:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157048 to 157046. [2020-07-20 04:21:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157046 states. [2020-07-20 04:21:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157046 states to 157046 states and 249638 transitions. [2020-07-20 04:21:58,070 INFO L78 Accepts]: Start accepts. Automaton has 157046 states and 249638 transitions. Word has length 476 [2020-07-20 04:21:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:21:58,070 INFO L479 AbstractCegarLoop]: Abstraction has 157046 states and 249638 transitions. [2020-07-20 04:21:58,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:21:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 157046 states and 249638 transitions. [2020-07-20 04:21:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:21:58,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:21:58,194 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 04:21:58,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 04:21:58,194 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:21:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:21:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1539997558, now seen corresponding path program 1 times [2020-07-20 04:21:58,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:21:58,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330279932] [2020-07-20 04:21:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:21:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:22:00,047 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:22:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:22:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:22:00,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330279932] [2020-07-20 04:22:00,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:22:00,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 04:22:00,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101482499] [2020-07-20 04:22:00,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 04:22:00,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:22:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 04:22:00,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-20 04:22:00,343 INFO L87 Difference]: Start difference. First operand 157046 states and 249638 transitions. Second operand 14 states. [2020-07-20 04:22:01,436 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 04:22:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:22:31,116 INFO L93 Difference]: Finished difference Result 234320 states and 370860 transitions. [2020-07-20 04:22:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 04:22:31,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 476 [2020-07-20 04:22:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:22:31,346 INFO L225 Difference]: With dead ends: 234320 [2020-07-20 04:22:31,346 INFO L226 Difference]: Without dead ends: 220089 [2020-07-20 04:22:31,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 04:22:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220089 states. [2020-07-20 04:22:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220089 to 167302. [2020-07-20 04:22:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167302 states. [2020-07-20 04:22:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167302 states to 167302 states and 264406 transitions. [2020-07-20 04:22:45,207 INFO L78 Accepts]: Start accepts. Automaton has 167302 states and 264406 transitions. Word has length 476 [2020-07-20 04:22:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:22:45,207 INFO L479 AbstractCegarLoop]: Abstraction has 167302 states and 264406 transitions. [2020-07-20 04:22:45,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 04:22:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 167302 states and 264406 transitions. [2020-07-20 04:22:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:22:45,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:22:45,338 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 04:22:45,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 04:22:45,338 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:22:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:22:45,338 INFO L82 PathProgramCache]: Analyzing trace with hash -450585505, now seen corresponding path program 1 times [2020-07-20 04:22:45,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:22:45,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547112650] [2020-07-20 04:22:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:22:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:22:47,563 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:22:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:22:47,877 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 04:22:47,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547112650] [2020-07-20 04:22:47,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:22:47,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-20 04:22:47,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971857181] [2020-07-20 04:22:47,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 04:22:47,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:22:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 04:22:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-20 04:22:47,879 INFO L87 Difference]: Start difference. First operand 167302 states and 264406 transitions. Second operand 17 states. [2020-07-20 04:22:49,963 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 412 DAG size of output: 410 [2020-07-20 04:23:02,236 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-07-20 04:23:04,162 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-07-20 04:23:13,117 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-20 04:23:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:23:57,024 INFO L93 Difference]: Finished difference Result 418269 states and 651544 transitions. [2020-07-20 04:23:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-20 04:23:57,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-20 04:23:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:23:57,430 INFO L225 Difference]: With dead ends: 418269 [2020-07-20 04:23:57,431 INFO L226 Difference]: Without dead ends: 387910 [2020-07-20 04:23:57,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 04:23:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387910 states. [2020-07-20 04:24:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387910 to 179654. [2020-07-20 04:24:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179654 states. [2020-07-20 04:24:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179654 states to 179654 states and 282246 transitions. [2020-07-20 04:24:11,103 INFO L78 Accepts]: Start accepts. Automaton has 179654 states and 282246 transitions. Word has length 476 [2020-07-20 04:24:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:24:11,104 INFO L479 AbstractCegarLoop]: Abstraction has 179654 states and 282246 transitions. [2020-07-20 04:24:11,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 04:24:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 179654 states and 282246 transitions. [2020-07-20 04:24:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:24:11,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:24:11,231 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 04:24:11,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 04:24:11,232 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:24:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:24:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash -290890227, now seen corresponding path program 1 times [2020-07-20 04:24:11,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:24:11,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090154796] [2020-07-20 04:24:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:24:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:24:13,143 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:24:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:24:13,529 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 04:24:13,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090154796] [2020-07-20 04:24:13,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:24:13,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-20 04:24:13,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918475839] [2020-07-20 04:24:13,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 04:24:13,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:24:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 04:24:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-20 04:24:13,532 INFO L87 Difference]: Start difference. First operand 179654 states and 282246 transitions. Second operand 17 states. [2020-07-20 04:24:15,937 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-20 04:24:18,146 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 425 DAG size of output: 419 [2020-07-20 04:24:47,630 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-07-20 04:25:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:25:15,661 INFO L93 Difference]: Finished difference Result 342787 states and 535144 transitions. [2020-07-20 04:25:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 04:25:15,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-20 04:25:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:25:16,001 INFO L225 Difference]: With dead ends: 342787 [2020-07-20 04:25:16,002 INFO L226 Difference]: Without dead ends: 328556 [2020-07-20 04:25:16,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 04:25:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328556 states. [2020-07-20 04:25:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328556 to 183718. [2020-07-20 04:25:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183718 states. [2020-07-20 04:25:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183718 states to 183718 states and 288054 transitions. [2020-07-20 04:25:31,593 INFO L78 Accepts]: Start accepts. Automaton has 183718 states and 288054 transitions. Word has length 476 [2020-07-20 04:25:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:25:31,594 INFO L479 AbstractCegarLoop]: Abstraction has 183718 states and 288054 transitions. [2020-07-20 04:25:31,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 04:25:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 183718 states and 288054 transitions. [2020-07-20 04:25:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:25:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:25:31,723 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 04:25:31,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 04:25:31,724 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:25:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:25:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2013494006, now seen corresponding path program 1 times [2020-07-20 04:25:31,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:25:31,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110500377] [2020-07-20 04:25:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:25:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:25:36,189 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:25:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:25:36,410 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 04:25:36,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110500377] [2020-07-20 04:25:36,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:25:36,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:25:36,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319225219] [2020-07-20 04:25:36,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:25:36,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:25:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:25:36,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:25:36,412 INFO L87 Difference]: Start difference. First operand 183718 states and 288054 transitions. Second operand 5 states. [2020-07-20 04:26:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:26:22,393 INFO L93 Difference]: Finished difference Result 536030 states and 839729 transitions. [2020-07-20 04:26:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:26:22,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-20 04:26:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:26:22,777 INFO L225 Difference]: With dead ends: 536030 [2020-07-20 04:26:22,777 INFO L226 Difference]: Without dead ends: 356514 [2020-07-20 04:26:22,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:26:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356514 states. [2020-07-20 04:26:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356514 to 356463. [2020-07-20 04:26:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356463 states. [2020-07-20 04:26:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356463 states to 356463 states and 556376 transitions. [2020-07-20 04:26:58,129 INFO L78 Accepts]: Start accepts. Automaton has 356463 states and 556376 transitions. Word has length 476 [2020-07-20 04:26:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:26:58,130 INFO L479 AbstractCegarLoop]: Abstraction has 356463 states and 556376 transitions. [2020-07-20 04:26:58,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:26:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 356463 states and 556376 transitions. [2020-07-20 04:26:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:26:58,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:26:58,409 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 04:26:58,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 04:26:58,410 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:26:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:26:58,410 INFO L82 PathProgramCache]: Analyzing trace with hash -596441289, now seen corresponding path program 1 times [2020-07-20 04:26:58,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:26:58,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336929445] [2020-07-20 04:26:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:26:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:27:00,439 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:27:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:27:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:27:00,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336929445] [2020-07-20 04:27:00,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:27:00,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:27:00,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844273456] [2020-07-20 04:27:00,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:27:00,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:27:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:27:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:27:00,575 INFO L87 Difference]: Start difference. First operand 356463 states and 556376 transitions. Second operand 5 states. [2020-07-20 04:28:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:28:07,058 INFO L93 Difference]: Finished difference Result 847694 states and 1331134 transitions. [2020-07-20 04:28:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:28:07,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-20 04:28:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:28:07,550 INFO L225 Difference]: With dead ends: 847694 [2020-07-20 04:28:07,550 INFO L226 Difference]: Without dead ends: 432139 [2020-07-20 04:28:07,769 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 04:28:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432139 states. [2020-07-20 04:28:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432139 to 432060. [2020-07-20 04:28:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432060 states. [2020-07-20 04:28:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432060 states to 432060 states and 677003 transitions. [2020-07-20 04:28:46,387 INFO L78 Accepts]: Start accepts. Automaton has 432060 states and 677003 transitions. Word has length 476 [2020-07-20 04:28:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:28:46,387 INFO L479 AbstractCegarLoop]: Abstraction has 432060 states and 677003 transitions. [2020-07-20 04:28:46,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:28:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 432060 states and 677003 transitions. [2020-07-20 04:28:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:28:46,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:28:46,731 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 04:28:46,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 04:28:46,732 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:28:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:28:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash -474978496, now seen corresponding path program 1 times [2020-07-20 04:28:46,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:28:46,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610758599] [2020-07-20 04:28:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38547238 [2020-07-20 04:28:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:28:49,129 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 04:28:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:28:49,290 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 04:28:49,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610758599] [2020-07-20 04:28:49,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:28:49,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:28:49,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391319542] [2020-07-20 04:28:49,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:28:49,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:28:49,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:28:49,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:28:49,292 INFO L87 Difference]: Start difference. First operand 432060 states and 677003 transitions. Second operand 5 states.