/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:58:30,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:58:30,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:58:30,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:58:30,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:58:30,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:58:30,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:58:30,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:58:30,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:58:30,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:58:30,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:58:30,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:58:30,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:58:30,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:58:30,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:58:30,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:58:30,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:58:30,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:58:30,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:58:30,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:58:30,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:58:30,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:58:30,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:58:30,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:58:30,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:58:30,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:58:30,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:58:30,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:58:30,415 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 [2020-07-19 23:58:30,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:58:30,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:58:30,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:58:30,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:58:30,433 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:58:30,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:58:30,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:58:30,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:58:30,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:58:30,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:58:30,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:58:30,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:58:30,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:58:30,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:58:30,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:58:30,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:58:30,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:58:30,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:58:30,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:58:30,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:58:30,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:58:30,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:58:30,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:58:30,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:58:30,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:58:30,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:58:30,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:58:30,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:58:30,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:58:30,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:58:30,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:58:30,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:58:30,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:58:30,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:58:30,735 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:58:30,736 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-19 23:58:30,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f313715d0/98be8369585b4619ba7eed17346cb8d2/FLAG551328f94 [2020-07-19 23:58:31,500 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:58:31,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-19 23:58:31,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f313715d0/98be8369585b4619ba7eed17346cb8d2/FLAG551328f94 [2020-07-19 23:58:31,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f313715d0/98be8369585b4619ba7eed17346cb8d2 [2020-07-19 23:58:31,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:58:31,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:58:31,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:58:31,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:58:31,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:58:31,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:58:31" (1/1) ... [2020-07-19 23:58:31,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a25513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:31, skipping insertion in model container [2020-07-19 23:58:31,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:58:31" (1/1) ... [2020-07-19 23:58:31,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:58:31,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:58:33,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:58:33,419 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:58:34,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:58:34,487 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:58:34,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34 WrapperNode [2020-07-19 23:58:34,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:58:34,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:58:34,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:58:34,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:58:34,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... [2020-07-19 23:58:34,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:58:34,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:58:34,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:58:34,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:58:34,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:58:34,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:58:34,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:58:34,836 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:58:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:58:34,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:58:34,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 23:58:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-19 23:58:34,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-19 23:58:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-19 23:58:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:58:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:58:34,841 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-19 23:58:34,841 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-19 23:58:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-19 23:58:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-19 23:58:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-19 23:58:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-19 23:58:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-19 23:58:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 23:58:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 23:58:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:58:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:58:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:58:39,085 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:58:39,087 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:58:39,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:58:39 BoogieIcfgContainer [2020-07-19 23:58:39,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:58:39,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:58:39,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:58:39,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:58:39,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:58:31" (1/3) ... [2020-07-19 23:58:39,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da9142c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:58:39, skipping insertion in model container [2020-07-19 23:58:39,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:34" (2/3) ... [2020-07-19 23:58:39,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da9142c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:58:39, skipping insertion in model container [2020-07-19 23:58:39,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:58:39" (3/3) ... [2020-07-19 23:58:39,117 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-19 23:58:39,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:58:39,138 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:58:39,151 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:58:39,186 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:58:39,186 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:58:39,186 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:58:39,187 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:58:39,187 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:58:39,187 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:58:39,187 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:58:39,187 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:58:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-19 23:58:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-19 23:58:39,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:58:39,274 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] [2020-07-19 23:58:39,274 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:58:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:58:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-19 23:58:39,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:58:39,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151100129] [2020-07-19 23:58:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-19 23:58:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:58:41,772 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-19 23:58:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:58:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:58:42,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151100129] [2020-07-19 23:58:42,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:58:42,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:58:42,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972097406] [2020-07-19 23:58:42,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:58:42,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:58:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:58:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:58:42,073 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-07-19 23:58:42,912 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-07-19 23:58:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:58:53,302 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-07-19 23:58:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:58:53,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-19 23:58:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:58:53,349 INFO L225 Difference]: With dead ends: 2262 [2020-07-19 23:58:53,350 INFO L226 Difference]: Without dead ends: 1993 [2020-07-19 23:58:53,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:58:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-07-19 23:58:53,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-07-19 23:58:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-07-19 23:58:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-07-19 23:58:53,525 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-07-19 23:58:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:58:53,527 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-07-19 23:58:53,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:58:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-07-19 23:58:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-19 23:58:53,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:58:53,539 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] [2020-07-19 23:58:53,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:58:53,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:58:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:58:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-07-19 23:58:53,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:58:53,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753172160] [2020-07-19 23:58:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-19 23:58:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:58:56,044 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-19 23:58:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:58:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:58:56,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753172160] [2020-07-19 23:58:56,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:58:56,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:58:56,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139846738] [2020-07-19 23:58:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:58:56,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:58:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:58:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:58:56,415 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-07-19 23:59:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:59:11,564 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-07-19 23:59:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:59:11,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-19 23:59:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:59:11,589 INFO L225 Difference]: With dead ends: 5904 [2020-07-19 23:59:11,589 INFO L226 Difference]: Without dead ends: 3930 [2020-07-19 23:59:11,599 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 [2020-07-19 23:59:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-07-19 23:59:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-07-19 23:59:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-07-19 23:59:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-07-19 23:59:11,765 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-07-19 23:59:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:59:11,766 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-07-19 23:59:11,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:59:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-07-19 23:59:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-19 23:59:11,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:59:11,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:59:11,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:59:11,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:59:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:59:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-19 23:59:11,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:59:11,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198537207] [2020-07-19 23:59:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-19 23:59:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:13,255 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-19 23:59:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:59:14,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198537207] [2020-07-19 23:59:14,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:59:14,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:59:14,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72648325] [2020-07-19 23:59:14,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:59:14,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:14,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:59:14,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:14,008 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-07-19 23:59:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:59:31,360 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-07-19 23:59:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:59:31,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-19 23:59:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:59:31,401 INFO L225 Difference]: With dead ends: 11482 [2020-07-19 23:59:31,402 INFO L226 Difference]: Without dead ends: 7768 [2020-07-19 23:59:31,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-07-19 23:59:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-07-19 23:59:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-07-19 23:59:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-07-19 23:59:31,770 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-07-19 23:59:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:59:31,771 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-07-19 23:59:31,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:59:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-07-19 23:59:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-19 23:59:31,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:59:31,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:59:31,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 23:59:31,800 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:59:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:59:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-19 23:59:31,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:59:31,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522900593] [2020-07-19 23:59:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-19 23:59:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:32,759 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-19 23:59:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:59:33,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522900593] [2020-07-19 23:59:33,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:59:33,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:59:33,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18577627] [2020-07-19 23:59:33,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:59:33,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:59:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:33,018 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states. [2020-07-19 23:59:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:59:50,994 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-07-19 23:59:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:59:50,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-19 23:59:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:59:51,061 INFO L225 Difference]: With dead ends: 23201 [2020-07-19 23:59:51,061 INFO L226 Difference]: Without dead ends: 15487 [2020-07-19 23:59:51,079 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 [2020-07-19 23:59:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-07-19 23:59:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-07-19 23:59:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-07-19 23:59:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-07-19 23:59:51,520 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-07-19 23:59:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:59:51,521 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-07-19 23:59:51,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:59:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-07-19 23:59:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-19 23:59:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:59:51,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:59:51,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 23:59:51,551 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:59:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:59:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-19 23:59:51,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:59:51,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451428990] [2020-07-19 23:59:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-19 23:59:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:52,843 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-19 23:59:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:59:53,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451428990] [2020-07-19 23:59:53,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:59:53,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:59:53,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816413791] [2020-07-19 23:59:53,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:59:53,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:59:53,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:53,127 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-07-20 00:00:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:11,494 INFO L93 Difference]: Finished difference Result 22716 states and 36476 transitions. [2020-07-20 00:00:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:00:11,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 00:00:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:11,532 INFO L225 Difference]: With dead ends: 22716 [2020-07-20 00:00:11,533 INFO L226 Difference]: Without dead ends: 15302 [2020-07-20 00:00:11,548 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 00:00:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2020-07-20 00:00:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15300. [2020-07-20 00:00:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15300 states. [2020-07-20 00:00:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15300 states to 15300 states and 24521 transitions. [2020-07-20 00:00:12,132 INFO L78 Accepts]: Start accepts. Automaton has 15300 states and 24521 transitions. Word has length 480 [2020-07-20 00:00:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:12,133 INFO L479 AbstractCegarLoop]: Abstraction has 15300 states and 24521 transitions. [2020-07-20 00:00:12,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:00:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 15300 states and 24521 transitions. [2020-07-20 00:00:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 00:00:12,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:12,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:00:12,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 00:00:12,166 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -342175906, now seen corresponding path program 1 times [2020-07-20 00:00:12,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:12,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544802746] [2020-07-20 00:00:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:00:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:13,178 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:00:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:13,393 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 00:00:13,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544802746] [2020-07-20 00:00:13,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:00:13,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:00:13,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98967846] [2020-07-20 00:00:13,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:00:13,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:00:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:13,410 INFO L87 Difference]: Start difference. First operand 15300 states and 24521 transitions. Second operand 4 states. [2020-07-20 00:00:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:32,595 INFO L93 Difference]: Finished difference Result 45644 states and 73118 transitions. [2020-07-20 00:00:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:00:32,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 00:00:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:32,669 INFO L225 Difference]: With dead ends: 45644 [2020-07-20 00:00:32,669 INFO L226 Difference]: Without dead ends: 30488 [2020-07-20 00:00:32,703 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 00:00:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-07-20 00:00:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15398. [2020-07-20 00:00:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-07-20 00:00:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 24672 transitions. [2020-07-20 00:00:33,325 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 24672 transitions. Word has length 480 [2020-07-20 00:00:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:33,325 INFO L479 AbstractCegarLoop]: Abstraction has 15398 states and 24672 transitions. [2020-07-20 00:00:33,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:00:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 24672 transitions. [2020-07-20 00:00:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 00:00:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:33,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:00:33,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 00:00:33,357 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1081253375, now seen corresponding path program 1 times [2020-07-20 00:00:33,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:33,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51681707] [2020-07-20 00:00:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:00:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:34,362 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:00:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:34,586 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 00:00:34,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51681707] [2020-07-20 00:00:34,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:00:34,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:00:34,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583526592] [2020-07-20 00:00:34,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:00:34,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:00:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:34,592 INFO L87 Difference]: Start difference. First operand 15398 states and 24672 transitions. Second operand 4 states. [2020-07-20 00:00:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:54,713 INFO L93 Difference]: Finished difference Result 45779 states and 73299 transitions. [2020-07-20 00:00:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:00:54,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-20 00:00:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:54,767 INFO L225 Difference]: With dead ends: 45779 [2020-07-20 00:00:54,767 INFO L226 Difference]: Without dead ends: 30605 [2020-07-20 00:00:54,804 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 00:00:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-07-20 00:00:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15515. [2020-07-20 00:00:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2020-07-20 00:00:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 24818 transitions. [2020-07-20 00:00:55,584 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 24818 transitions. Word has length 481 [2020-07-20 00:00:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:55,585 INFO L479 AbstractCegarLoop]: Abstraction has 15515 states and 24818 transitions. [2020-07-20 00:00:55,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:00:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 24818 transitions. [2020-07-20 00:00:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 00:00:55,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:55,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:00:55,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 00:00:55,609 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1552601612, now seen corresponding path program 1 times [2020-07-20 00:00:55,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:55,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241815269] [2020-07-20 00:00:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:00:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:56,923 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:00:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:57,175 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 00:00:57,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241815269] [2020-07-20 00:00:57,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:00:57,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:00:57,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823328172] [2020-07-20 00:00:57,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:00:57,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:00:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:57,177 INFO L87 Difference]: Start difference. First operand 15515 states and 24818 transitions. Second operand 4 states. [2020-07-20 00:01:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:01:17,036 INFO L93 Difference]: Finished difference Result 44734 states and 71393 transitions. [2020-07-20 00:01:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:01:17,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-20 00:01:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:01:17,092 INFO L225 Difference]: With dead ends: 44734 [2020-07-20 00:01:17,092 INFO L226 Difference]: Without dead ends: 30188 [2020-07-20 00:01:17,124 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 00:01:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30188 states. [2020-07-20 00:01:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30188 to 30186. [2020-07-20 00:01:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2020-07-20 00:01:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 48059 transitions. [2020-07-20 00:01:18,358 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 48059 transitions. Word has length 482 [2020-07-20 00:01:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:01:18,359 INFO L479 AbstractCegarLoop]: Abstraction has 30186 states and 48059 transitions. [2020-07-20 00:01:18,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:01:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 48059 transitions. [2020-07-20 00:01:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 00:01:18,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:01:18,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:01:18,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 00:01:18,393 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:01:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:01:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104209, now seen corresponding path program 1 times [2020-07-20 00:01:18,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:01:18,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645976297] [2020-07-20 00:01:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:01:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:20,057 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:01:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:20,298 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 00:01:20,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645976297] [2020-07-20 00:01:20,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:01:20,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:01:20,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388284343] [2020-07-20 00:01:20,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:01:20,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:01:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:01:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:01:20,307 INFO L87 Difference]: Start difference. First operand 30186 states and 48059 transitions. Second operand 5 states. [2020-07-20 00:01:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:01:36,791 INFO L93 Difference]: Finished difference Result 67902 states and 108914 transitions. [2020-07-20 00:01:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:01:36,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 482 [2020-07-20 00:01:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:01:36,844 INFO L225 Difference]: With dead ends: 67902 [2020-07-20 00:01:36,845 INFO L226 Difference]: Without dead ends: 34534 [2020-07-20 00:01:36,879 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 00:01:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34534 states. [2020-07-20 00:01:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34534 to 34532. [2020-07-20 00:01:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34532 states. [2020-07-20 00:01:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34532 states to 34532 states and 55222 transitions. [2020-07-20 00:01:39,789 INFO L78 Accepts]: Start accepts. Automaton has 34532 states and 55222 transitions. Word has length 482 [2020-07-20 00:01:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:01:39,789 INFO L479 AbstractCegarLoop]: Abstraction has 34532 states and 55222 transitions. [2020-07-20 00:01:39,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:01:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34532 states and 55222 transitions. [2020-07-20 00:01:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 00:01:39,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:01:39,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:01:39,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 00:01:39,833 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:01:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:01:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1612954702, now seen corresponding path program 1 times [2020-07-20 00:01:39,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:01:39,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975603880] [2020-07-20 00:01:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:01:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:40,909 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:01:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:41,147 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 00:01:41,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975603880] [2020-07-20 00:01:41,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:01:41,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:01:41,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656393697] [2020-07-20 00:01:41,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:01:41,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:01:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:01:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:01:41,149 INFO L87 Difference]: Start difference. First operand 34532 states and 55222 transitions. Second operand 4 states. [2020-07-20 00:02:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:02:03,864 INFO L93 Difference]: Finished difference Result 101493 states and 162313 transitions. [2020-07-20 00:02:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:02:03,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 00:02:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:02:03,938 INFO L225 Difference]: With dead ends: 101493 [2020-07-20 00:02:03,939 INFO L226 Difference]: Without dead ends: 67981 [2020-07-20 00:02:03,971 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 00:02:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67981 states. [2020-07-20 00:02:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67981 to 67979. [2020-07-20 00:02:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67979 states. [2020-07-20 00:02:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 108295 transitions. [2020-07-20 00:02:06,993 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 108295 transitions. Word has length 484 [2020-07-20 00:02:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:02:06,994 INFO L479 AbstractCegarLoop]: Abstraction has 67979 states and 108295 transitions. [2020-07-20 00:02:06,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:02:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 108295 transitions. [2020-07-20 00:02:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:02:07,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:02:07,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:02:07,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 00:02:07,062 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:02:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:02:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2030409168, now seen corresponding path program 1 times [2020-07-20 00:02:07,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:02:07,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595681257] [2020-07-20 00:02:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:02:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:07,988 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:02:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:09,806 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 00:02:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595681257] [2020-07-20 00:02:09,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:02:09,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:02:09,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804790890] [2020-07-20 00:02:09,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:02:09,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:02:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:02:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:02:09,808 INFO L87 Difference]: Start difference. First operand 67979 states and 108295 transitions. Second operand 4 states. [2020-07-20 00:02:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:02:25,645 INFO L93 Difference]: Finished difference Result 199189 states and 316915 transitions. [2020-07-20 00:02:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:02:25,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 00:02:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:02:25,794 INFO L225 Difference]: With dead ends: 199189 [2020-07-20 00:02:25,794 INFO L226 Difference]: Without dead ends: 133603 [2020-07-20 00:02:25,852 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 00:02:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133603 states. [2020-07-20 00:02:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133603 to 68369. [2020-07-20 00:02:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68369 states. [2020-07-20 00:02:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68369 states to 68369 states and 108871 transitions. [2020-07-20 00:02:29,769 INFO L78 Accepts]: Start accepts. Automaton has 68369 states and 108871 transitions. Word has length 485 [2020-07-20 00:02:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:02:29,769 INFO L479 AbstractCegarLoop]: Abstraction has 68369 states and 108871 transitions. [2020-07-20 00:02:29,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:02:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 68369 states and 108871 transitions. [2020-07-20 00:02:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 00:02:29,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:02:29,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:02:29,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 00:02:29,827 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:02:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:02:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1971007991, now seen corresponding path program 1 times [2020-07-20 00:02:29,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:02:29,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799634731] [2020-07-20 00:02:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:02:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:31,070 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:02:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:31,385 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 00:02:31,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799634731] [2020-07-20 00:02:31,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:02:31,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:02:31,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38937657] [2020-07-20 00:02:31,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:02:31,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:02:31,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:02:31,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:02:31,388 INFO L87 Difference]: Start difference. First operand 68369 states and 108871 transitions. Second operand 4 states. [2020-07-20 00:02:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:02:59,514 INFO L93 Difference]: Finished difference Result 200055 states and 318313 transitions. [2020-07-20 00:02:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:02:59,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-20 00:02:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:02:59,663 INFO L225 Difference]: With dead ends: 200055 [2020-07-20 00:02:59,664 INFO L226 Difference]: Without dead ends: 134536 [2020-07-20 00:02:59,718 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 00:02:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134536 states. [2020-07-20 00:03:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134536 to 134534. [2020-07-20 00:03:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134534 states. [2020-07-20 00:03:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134534 states to 134534 states and 213380 transitions. [2020-07-20 00:03:07,725 INFO L78 Accepts]: Start accepts. Automaton has 134534 states and 213380 transitions. Word has length 486 [2020-07-20 00:03:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:03:07,725 INFO L479 AbstractCegarLoop]: Abstraction has 134534 states and 213380 transitions. [2020-07-20 00:03:07,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:03:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 134534 states and 213380 transitions. [2020-07-20 00:03:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 00:03:07,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:03:07,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:03:07,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 00:03:07,840 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:03:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:03:07,840 INFO L82 PathProgramCache]: Analyzing trace with hash -917079770, now seen corresponding path program 1 times [2020-07-20 00:03:07,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:03:07,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585877414] [2020-07-20 00:03:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:03:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:03:10,027 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:03:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:03:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:03:10,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585877414] [2020-07-20 00:03:10,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:03:10,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:03:10,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383964505] [2020-07-20 00:03:10,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:03:10,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:03:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:03:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:03:10,196 INFO L87 Difference]: Start difference. First operand 134534 states and 213380 transitions. Second operand 5 states. [2020-07-20 00:03:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:03:36,487 INFO L93 Difference]: Finished difference Result 312717 states and 499578 transitions. [2020-07-20 00:03:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:03:36,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-07-20 00:03:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:03:36,695 INFO L225 Difference]: With dead ends: 312717 [2020-07-20 00:03:36,695 INFO L226 Difference]: Without dead ends: 159955 [2020-07-20 00:03:36,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:03:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159955 states. [2020-07-20 00:03:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159955 to 159953. [2020-07-20 00:03:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159953 states. [2020-07-20 00:03:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159953 states to 159953 states and 254900 transitions. [2020-07-20 00:03:48,438 INFO L78 Accepts]: Start accepts. Automaton has 159953 states and 254900 transitions. Word has length 486 [2020-07-20 00:03:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:03:48,438 INFO L479 AbstractCegarLoop]: Abstraction has 159953 states and 254900 transitions. [2020-07-20 00:03:48,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:03:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 159953 states and 254900 transitions. [2020-07-20 00:03:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:03:48,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:03:48,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:03:48,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 00:03:48,586 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:03:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:03:48,587 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-20 00:03:48,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:03:48,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831395968] [2020-07-20 00:03:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:03:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:03:49,697 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:03:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:03:52,615 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 00:03:52,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831395968] [2020-07-20 00:03:52,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:03:52,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:03:52,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504407195] [2020-07-20 00:03:52,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:03:52,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:03:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:03:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:03:52,618 INFO L87 Difference]: Start difference. First operand 159953 states and 254900 transitions. Second operand 4 states. [2020-07-20 00:03:53,438 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2020-07-20 00:04:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:04:18,285 INFO L93 Difference]: Finished difference Result 332173 states and 515718 transitions. [2020-07-20 00:04:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:04:18,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 00:04:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:04:18,585 INFO L225 Difference]: With dead ends: 332173 [2020-07-20 00:04:18,585 INFO L226 Difference]: Without dead ends: 243475 [2020-07-20 00:04:18,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:04:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243475 states. [2020-07-20 00:04:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243475 to 243473. [2020-07-20 00:04:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243473 states. [2020-07-20 00:04:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243473 states to 243473 states and 379388 transitions. [2020-07-20 00:04:38,204 INFO L78 Accepts]: Start accepts. Automaton has 243473 states and 379388 transitions. Word has length 488 [2020-07-20 00:04:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:04:38,205 INFO L479 AbstractCegarLoop]: Abstraction has 243473 states and 379388 transitions. [2020-07-20 00:04:38,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:04:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 243473 states and 379388 transitions. [2020-07-20 00:04:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:04:39,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:04:39,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:04:39,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 00:04:39,178 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:04:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:04:39,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1358520816, now seen corresponding path program 1 times [2020-07-20 00:04:39,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:04:39,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355023894] [2020-07-20 00:04:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:04:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:04:41,073 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:04:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:04:41,513 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 00:04:41,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355023894] [2020-07-20 00:04:41,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:04:41,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-20 00:04:41,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484311756] [2020-07-20 00:04:41,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 00:04:41,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:04:41,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 00:04:41,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-07-20 00:04:41,515 INFO L87 Difference]: Start difference. First operand 243473 states and 379388 transitions. Second operand 18 states. [2020-07-20 00:04:42,682 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification that was a NOOP. DAG size: 425 [2020-07-20 00:04:56,677 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-07-20 00:05:05,380 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-07-20 00:05:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:05:53,741 INFO L93 Difference]: Finished difference Result 538745 states and 845384 transitions. [2020-07-20 00:05:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 00:05:53,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 488 [2020-07-20 00:05:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:05:54,383 INFO L225 Difference]: With dead ends: 538745 [2020-07-20 00:05:54,383 INFO L226 Difference]: Without dead ends: 508919 [2020-07-20 00:05:54,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=764, Invalid=1992, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 00:05:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508919 states. [2020-07-20 00:06:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508919 to 326929. [2020-07-20 00:06:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326929 states. [2020-07-20 00:06:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326929 states to 326929 states and 509404 transitions. [2020-07-20 00:06:23,268 INFO L78 Accepts]: Start accepts. Automaton has 326929 states and 509404 transitions. Word has length 488 [2020-07-20 00:06:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:23,269 INFO L479 AbstractCegarLoop]: Abstraction has 326929 states and 509404 transitions. [2020-07-20 00:06:23,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 00:06:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 326929 states and 509404 transitions. [2020-07-20 00:06:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:06:23,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:23,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:06:23,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 00:06:23,541 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:23,542 INFO L82 PathProgramCache]: Analyzing trace with hash -763957802, now seen corresponding path program 1 times [2020-07-20 00:06:23,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:23,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780870888] [2020-07-20 00:06:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:06:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:25,935 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:06:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:26,246 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 00:06:26,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780870888] [2020-07-20 00:06:26,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:26,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 00:06:26,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409741749] [2020-07-20 00:06:26,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 00:06:26,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:26,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 00:06:26,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 00:06:26,249 INFO L87 Difference]: Start difference. First operand 326929 states and 509404 transitions. Second operand 14 states. [2020-07-20 00:06:27,425 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 00:07:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:22,152 INFO L93 Difference]: Finished difference Result 432433 states and 671584 transitions. [2020-07-20 00:07:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 00:07:22,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-20 00:07:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:22,585 INFO L225 Difference]: With dead ends: 432433 [2020-07-20 00:07:22,586 INFO L226 Difference]: Without dead ends: 361487 [2020-07-20 00:07:22,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 00:07:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361487 states. [2020-07-20 00:07:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361487 to 255985. [2020-07-20 00:07:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255985 states. [2020-07-20 00:07:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255985 states to 255985 states and 397388 transitions. [2020-07-20 00:07:48,007 INFO L78 Accepts]: Start accepts. Automaton has 255985 states and 397388 transitions. Word has length 488 [2020-07-20 00:07:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:48,008 INFO L479 AbstractCegarLoop]: Abstraction has 255985 states and 397388 transitions. [2020-07-20 00:07:48,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 00:07:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 255985 states and 397388 transitions. [2020-07-20 00:07:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:07:48,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:48,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:48,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 00:07:48,236 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-20 00:07:48,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:48,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825882827] [2020-07-20 00:07:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:07:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:51,214 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:07:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:51,622 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 00:07:51,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825882827] [2020-07-20 00:07:51,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:51,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 00:07:51,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88709590] [2020-07-20 00:07:51,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 00:07:51,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 00:07:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 00:07:51,624 INFO L87 Difference]: Start difference. First operand 255985 states and 397388 transitions. Second operand 14 states. [2020-07-20 00:07:52,833 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 00:08:23,964 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-07-20 00:08:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:42,989 INFO L93 Difference]: Finished difference Result 375009 states and 584160 transitions. [2020-07-20 00:08:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 00:08:42,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-20 00:08:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:43,899 INFO L225 Difference]: With dead ends: 375009 [2020-07-20 00:08:43,900 INFO L226 Difference]: Without dead ends: 346767 [2020-07-20 00:08:43,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 00:08:44,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346767 states. [2020-07-20 00:09:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346767 to 266561. [2020-07-20 00:09:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266561 states. [2020-07-20 00:09:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266561 states to 266561 states and 412444 transitions. [2020-07-20 00:09:09,254 INFO L78 Accepts]: Start accepts. Automaton has 266561 states and 412444 transitions. Word has length 488 [2020-07-20 00:09:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:09,255 INFO L479 AbstractCegarLoop]: Abstraction has 266561 states and 412444 transitions. [2020-07-20 00:09:09,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 00:09:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 266561 states and 412444 transitions. [2020-07-20 00:09:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:09:09,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:09,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:09:09,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 00:09:09,491 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-20 00:09:09,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:09,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071480335] [2020-07-20 00:09:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8418216 [2020-07-20 00:09:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:10,875 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 00:09:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:11,782 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 00:09:11,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071480335] [2020-07-20 00:09:11,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:11,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:09:11,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719857335] [2020-07-20 00:09:11,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:09:11,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:09:11,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:09:11,785 INFO L87 Difference]: Start difference. First operand 266561 states and 412444 transitions. Second operand 5 states. [2020-07-20 00:10:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:10:13,211 INFO L93 Difference]: Finished difference Result 782363 states and 1209659 transitions. [2020-07-20 00:10:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:10:13,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-07-20 00:10:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:10:13,862 INFO L225 Difference]: With dead ends: 782363 [2020-07-20 00:10:13,862 INFO L226 Difference]: Without dead ends: 520004 [2020-07-20 00:10:14,111 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 00:10:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520004 states.