/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 BIGGEST_EQUIVALENCE_CLASS --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_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:37:52,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:37:52,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:37:52,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:37:52,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:37:52,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:37:52,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:37:52,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:37:52,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:37:52,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:37:52,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:37:52,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:37:52,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:37:52,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:37:52,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:37:52,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:37:52,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:37:52,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:37:52,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:37:52,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:37:52,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:37:52,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:37:52,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:37:52,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:37:52,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:37:52,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:37:52,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:37:52,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:37:52,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:37:52,219 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:37:52,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:37:52,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:37:52,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:37:52,221 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:37:52,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:37:52,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:37:52,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:37:52,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:37:52,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:37:52,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:37:52,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:37:52,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:37:52,222 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:37:52,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:37:52,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:37:52,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:37:52,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:37:52,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:37:52,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:37:52,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:37:52,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:37:52,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:37:52,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:37:52,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:37:52,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:37:52,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:37:52,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:37:52,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:37:52,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:37:52,494 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:37:52,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:37:52,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:37:52,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:37:52,512 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:37:52,513 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 06:37:52,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d4876f6/09c59df6d19b45a9b74aaaa6a2f3a8aa/FLAGbca87c0f5 [2020-07-20 06:37:53,207 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:37:53,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 06:37:53,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d4876f6/09c59df6d19b45a9b74aaaa6a2f3a8aa/FLAGbca87c0f5 [2020-07-20 06:37:53,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d4876f6/09c59df6d19b45a9b74aaaa6a2f3a8aa [2020-07-20 06:37:53,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:37:53,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:37:53,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:37:53,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:37:53,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:37:53,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:37:53" (1/1) ... [2020-07-20 06:37:53,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2231c289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:53, skipping insertion in model container [2020-07-20 06:37:53,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:37:53" (1/1) ... [2020-07-20 06:37:53,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:37:53,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:37:55,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:37:55,217 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:37:56,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:37:56,821 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:37:56,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56 WrapperNode [2020-07-20 06:37:56,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:37:56,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:37:56,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:37:56,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:37:56,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:56,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:56,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:56,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:56,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:56,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:56,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... [2020-07-20 06:37:57,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:37:57,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:37:57,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:37:57,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:37:57,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:37:57,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:37:57,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:37:57,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:37:57,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:37:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:37:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 06:37:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 06:37:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 06:37:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 06:37:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:37:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:37:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 06:37:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 06:37:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 06:37:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 06:37:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 06:37:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 06:37:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 06:37:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 06:37:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 06:37:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:37:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:37:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:38:01,479 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:38:01,479 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 06:38:01,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:38:01 BoogieIcfgContainer [2020-07-20 06:38:01,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:38:01,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:38:01,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:38:01,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:38:01,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:37:53" (1/3) ... [2020-07-20 06:38:01,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d5e45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:38:01, skipping insertion in model container [2020-07-20 06:38:01,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:37:56" (2/3) ... [2020-07-20 06:38:01,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d5e45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:38:01, skipping insertion in model container [2020-07-20 06:38:01,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:38:01" (3/3) ... [2020-07-20 06:38:01,503 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 06:38:01,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:38:01,528 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:38:01,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:38:01,584 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:38:01,584 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:38:01,584 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:38:01,584 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:38:01,585 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:38:01,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:38:01,585 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:38:01,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:38:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-20 06:38:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 06:38:01,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:38:01,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:38:01,673 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:38:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:38:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-20 06:38:01,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:38:01,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297938762] [2020-07-20 06:38:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:38:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:04,661 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:38:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:04,975 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 06:38:04,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297938762] [2020-07-20 06:38:04,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:38:04,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:38:04,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62809668] [2020-07-20 06:38:04,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:38:04,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:38:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:38:04,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:38:05,001 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-07-20 06:38:06,020 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 06:38:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:38:16,777 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-20 06:38:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:38:16,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-20 06:38:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:38:16,823 INFO L225 Difference]: With dead ends: 2488 [2020-07-20 06:38:16,824 INFO L226 Difference]: Without dead ends: 2186 [2020-07-20 06:38:16,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:38:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-20 06:38:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-20 06:38:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-20 06:38:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-20 06:38:16,997 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-20 06:38:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:38:17,000 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-20 06:38:17,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:38:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-20 06:38:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 06:38:17,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:38:17,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:38:17,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:38:17,013 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:38:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:38:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-20 06:38:17,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:38:17,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953585462] [2020-07-20 06:38:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:38:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:20,198 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:38:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:21,036 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 06:38:21,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953585462] [2020-07-20 06:38:21,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:38:21,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:38:21,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820033128] [2020-07-20 06:38:21,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:38:21,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:38:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:38:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:38:21,042 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-07-20 06:38:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:38:37,054 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-07-20 06:38:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:38:37,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-20 06:38:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:38:37,079 INFO L225 Difference]: With dead ends: 6476 [2020-07-20 06:38:37,080 INFO L226 Difference]: Without dead ends: 4309 [2020-07-20 06:38:37,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:38:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-07-20 06:38:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-07-20 06:38:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-07-20 06:38:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-07-20 06:38:37,264 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-07-20 06:38:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:38:37,266 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-07-20 06:38:37,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:38:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-07-20 06:38:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 06:38:37,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:38:37,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:38:37,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:38:37,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:38:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:38:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-07-20 06:38:37,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:38:37,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568888509] [2020-07-20 06:38:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:38:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:38,866 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:38:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:39,120 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 06:38:39,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568888509] [2020-07-20 06:38:39,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:38:39,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:38:39,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215884157] [2020-07-20 06:38:39,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:38:39,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:38:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:38:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:38:39,124 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2020-07-20 06:38:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:38:57,342 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2020-07-20 06:38:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:38:57,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-20 06:38:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:38:57,385 INFO L225 Difference]: With dead ends: 12605 [2020-07-20 06:38:57,386 INFO L226 Difference]: Without dead ends: 8512 [2020-07-20 06:38:57,396 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 [2020-07-20 06:38:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2020-07-20 06:38:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2020-07-20 06:38:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2020-07-20 06:38:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2020-07-20 06:38:57,721 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2020-07-20 06:38:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:38:57,722 INFO L479 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2020-07-20 06:38:57,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:38:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2020-07-20 06:38:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 06:38:57,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:38:57,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:38:57,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:38:57,761 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:38:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:38:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash -844140139, now seen corresponding path program 1 times [2020-07-20 06:38:57,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:38:57,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488062083] [2020-07-20 06:38:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:38:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:58,892 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:38:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:59,150 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 06:38:59,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488062083] [2020-07-20 06:38:59,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:38:59,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:38:59,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251283834] [2020-07-20 06:38:59,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:38:59,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:38:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:38:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:38:59,156 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2020-07-20 06:39:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:39:18,312 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2020-07-20 06:39:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:39:18,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-20 06:39:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:39:18,455 INFO L225 Difference]: With dead ends: 25433 [2020-07-20 06:39:18,456 INFO L226 Difference]: Without dead ends: 16975 [2020-07-20 06:39:18,472 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 [2020-07-20 06:39:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-07-20 06:39:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2020-07-20 06:39:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2020-07-20 06:39:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2020-07-20 06:39:18,860 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2020-07-20 06:39:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:39:18,860 INFO L479 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2020-07-20 06:39:18,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:39:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2020-07-20 06:39:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 06:39:18,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:39:18,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:39:18,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 06:39:18,892 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:39:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:39:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1609256108, now seen corresponding path program 1 times [2020-07-20 06:39:18,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:39:18,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643983195] [2020-07-20 06:39:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:39:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:39:20,235 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:39:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:39:20,627 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 06:39:20,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643983195] [2020-07-20 06:39:20,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:39:20,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:39:20,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015180890] [2020-07-20 06:39:20,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:39:20,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:39:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:39:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:39:20,629 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2020-07-20 06:39:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:39:39,878 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2020-07-20 06:39:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:39:39,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 06:39:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:39:39,916 INFO L225 Difference]: With dead ends: 24920 [2020-07-20 06:39:39,916 INFO L226 Difference]: Without dead ends: 16762 [2020-07-20 06:39:39,933 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 [2020-07-20 06:39:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2020-07-20 06:39:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2020-07-20 06:39:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2020-07-20 06:39:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2020-07-20 06:39:40,558 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2020-07-20 06:39:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:39:40,559 INFO L479 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2020-07-20 06:39:40,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:39:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2020-07-20 06:39:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 06:39:40,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:39:40,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:39:40,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 06:39:40,596 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:39:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:39:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1212361551, now seen corresponding path program 1 times [2020-07-20 06:39:40,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:39:40,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004938324] [2020-07-20 06:39:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:39:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:39:41,706 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:39:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:39:41,892 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 06:39:41,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004938324] [2020-07-20 06:39:41,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:39:41,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:39:41,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351194956] [2020-07-20 06:39:41,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:39:41,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:39:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:39:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:39:41,896 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2020-07-20 06:40:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:40:02,512 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2020-07-20 06:40:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:40:02,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 06:40:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:40:02,562 INFO L225 Difference]: With dead ends: 50024 [2020-07-20 06:40:02,563 INFO L226 Difference]: Without dead ends: 33408 [2020-07-20 06:40:02,590 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 [2020-07-20 06:40:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2020-07-20 06:40:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2020-07-20 06:40:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2020-07-20 06:40:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2020-07-20 06:40:03,328 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2020-07-20 06:40:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:40:03,328 INFO L479 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2020-07-20 06:40:03,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:40:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2020-07-20 06:40:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 06:40:03,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:40:03,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:40:03,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 06:40:03,355 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:40:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:40:03,355 INFO L82 PathProgramCache]: Analyzing trace with hash -481026426, now seen corresponding path program 1 times [2020-07-20 06:40:03,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:40:03,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417375649] [2020-07-20 06:40:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:40:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:40:04,637 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:40:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:40:04,863 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 06:40:04,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417375649] [2020-07-20 06:40:04,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:40:04,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:40:04,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869374376] [2020-07-20 06:40:04,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:40:04,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:40:04,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:40:04,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:40:04,865 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2020-07-20 06:40:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:40:26,145 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2020-07-20 06:40:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:40:26,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-20 06:40:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:40:26,186 INFO L225 Difference]: With dead ends: 50159 [2020-07-20 06:40:26,186 INFO L226 Difference]: Without dead ends: 33525 [2020-07-20 06:40:26,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:40:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2020-07-20 06:40:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2020-07-20 06:40:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2020-07-20 06:40:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2020-07-20 06:40:26,897 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2020-07-20 06:40:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:40:26,897 INFO L479 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2020-07-20 06:40:26,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:40:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2020-07-20 06:40:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 06:40:26,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:40:26,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:40:26,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 06:40:26,918 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:40:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:40:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash 353604489, now seen corresponding path program 1 times [2020-07-20 06:40:26,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:40:26,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991489349] [2020-07-20 06:40:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:40:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:40:28,402 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:40:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:40:28,627 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 06:40:28,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991489349] [2020-07-20 06:40:28,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:40:28,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:40:28,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547003478] [2020-07-20 06:40:28,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:40:28,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:40:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:40:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:40:28,630 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2020-07-20 06:40:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:40:43,405 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2020-07-20 06:40:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:40:43,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 06:40:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:40:43,430 INFO L225 Difference]: With dead ends: 36907 [2020-07-20 06:40:43,430 INFO L226 Difference]: Without dead ends: 24449 [2020-07-20 06:40:43,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:40:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2020-07-20 06:40:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2020-07-20 06:40:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2020-07-20 06:40:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2020-07-20 06:40:44,244 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2020-07-20 06:40:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:40:44,244 INFO L479 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2020-07-20 06:40:44,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:40:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2020-07-20 06:40:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 06:40:44,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:40:44,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:40:44,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 06:40:44,261 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:40:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:40:44,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1516159687, now seen corresponding path program 1 times [2020-07-20 06:40:44,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:40:44,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909197418] [2020-07-20 06:40:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:40:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:40:45,689 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:40:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:40:45,945 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 06:40:45,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909197418] [2020-07-20 06:40:45,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:40:45,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:40:45,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982114469] [2020-07-20 06:40:45,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:40:45,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:40:45,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:40:45,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:40:45,948 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 4 states. [2020-07-20 06:41:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:41:08,796 INFO L93 Difference]: Finished difference Result 58562 states and 94581 transitions. [2020-07-20 06:41:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:41:08,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 06:41:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:41:08,836 INFO L225 Difference]: With dead ends: 58562 [2020-07-20 06:41:08,837 INFO L226 Difference]: Without dead ends: 39356 [2020-07-20 06:41:08,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:41:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39356 states. [2020-07-20 06:41:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39356 to 39354. [2020-07-20 06:41:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39354 states. [2020-07-20 06:41:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 63395 transitions. [2020-07-20 06:41:10,345 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 63395 transitions. Word has length 502 [2020-07-20 06:41:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:41:10,346 INFO L479 AbstractCegarLoop]: Abstraction has 39354 states and 63395 transitions. [2020-07-20 06:41:10,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:41:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 63395 transitions. [2020-07-20 06:41:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 06:41:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:41:10,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:41:10,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 06:41:10,381 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:41:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:41:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1083405788, now seen corresponding path program 1 times [2020-07-20 06:41:10,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:41:10,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9354868] [2020-07-20 06:41:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:41:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:41:12,495 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:41:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:41:13,859 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 06:41:13,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9354868] [2020-07-20 06:41:13,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:41:13,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:41:13,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141508955] [2020-07-20 06:41:13,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:41:13,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:41:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:41:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:41:13,861 INFO L87 Difference]: Start difference. First operand 39354 states and 63395 transitions. Second operand 5 states. [2020-07-20 06:41:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:41:35,843 INFO L93 Difference]: Finished difference Result 86454 states and 139882 transitions. [2020-07-20 06:41:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:41:35,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-20 06:41:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:41:35,886 INFO L225 Difference]: With dead ends: 86454 [2020-07-20 06:41:35,886 INFO L226 Difference]: Without dead ends: 43810 [2020-07-20 06:41:35,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:41:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43810 states. [2020-07-20 06:41:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43810 to 43808. [2020-07-20 06:41:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43808 states. [2020-07-20 06:41:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43808 states to 43808 states and 70674 transitions. [2020-07-20 06:41:37,595 INFO L78 Accepts]: Start accepts. Automaton has 43808 states and 70674 transitions. Word has length 502 [2020-07-20 06:41:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:41:37,596 INFO L479 AbstractCegarLoop]: Abstraction has 43808 states and 70674 transitions. [2020-07-20 06:41:37,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:41:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 43808 states and 70674 transitions. [2020-07-20 06:41:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 06:41:37,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:41:37,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:41:37,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 06:41:37,635 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:41:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:41:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash -39965091, now seen corresponding path program 1 times [2020-07-20 06:41:37,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:41:37,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115015732] [2020-07-20 06:41:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:41:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:41:39,160 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:41:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:41:39,440 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 06:41:39,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115015732] [2020-07-20 06:41:39,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:41:39,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:41:39,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62250050] [2020-07-20 06:41:39,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:41:39,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:41:39,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:41:39,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:41:39,442 INFO L87 Difference]: Start difference. First operand 43808 states and 70674 transitions. Second operand 4 states. [2020-07-20 06:42:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:42:05,662 INFO L93 Difference]: Finished difference Result 129017 states and 208125 transitions. [2020-07-20 06:42:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:42:05,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-20 06:42:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:42:05,744 INFO L225 Difference]: With dead ends: 129017 [2020-07-20 06:42:05,744 INFO L226 Difference]: Without dead ends: 86229 [2020-07-20 06:42:05,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:42:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86229 states. [2020-07-20 06:42:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86229 to 86227. [2020-07-20 06:42:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86227 states. [2020-07-20 06:42:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86227 states to 86227 states and 138591 transitions. [2020-07-20 06:42:09,347 INFO L78 Accepts]: Start accepts. Automaton has 86227 states and 138591 transitions. Word has length 504 [2020-07-20 06:42:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:42:09,348 INFO L479 AbstractCegarLoop]: Abstraction has 86227 states and 138591 transitions. [2020-07-20 06:42:09,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:42:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 86227 states and 138591 transitions. [2020-07-20 06:42:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 06:42:09,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:42:09,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:42:09,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 06:42:09,419 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:42:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:42:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash -405833094, now seen corresponding path program 1 times [2020-07-20 06:42:09,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:42:09,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349877852] [2020-07-20 06:42:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:42:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:42:12,806 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:42:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:42:12,963 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 06:42:12,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349877852] [2020-07-20 06:42:12,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:42:12,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:42:12,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868845356] [2020-07-20 06:42:12,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:42:12,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:42:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:42:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:42:12,965 INFO L87 Difference]: Start difference. First operand 86227 states and 138591 transitions. Second operand 4 states. [2020-07-20 06:42:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:42:33,088 INFO L93 Difference]: Finished difference Result 181383 states and 289969 transitions. [2020-07-20 06:42:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:42:33,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-20 06:42:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:42:33,200 INFO L225 Difference]: With dead ends: 181383 [2020-07-20 06:42:33,200 INFO L226 Difference]: Without dead ends: 122133 [2020-07-20 06:42:33,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:42:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122133 states. [2020-07-20 06:42:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122133 to 108755. [2020-07-20 06:42:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108755 states. [2020-07-20 06:42:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108755 states to 108755 states and 175647 transitions. [2020-07-20 06:42:38,477 INFO L78 Accepts]: Start accepts. Automaton has 108755 states and 175647 transitions. Word has length 504 [2020-07-20 06:42:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:42:38,478 INFO L479 AbstractCegarLoop]: Abstraction has 108755 states and 175647 transitions. [2020-07-20 06:42:38,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:42:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 108755 states and 175647 transitions. [2020-07-20 06:42:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 06:42:38,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:42:38,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:42:38,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 06:42:38,531 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:42:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:42:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1006642470, now seen corresponding path program 1 times [2020-07-20 06:42:38,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:42:38,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780191837] [2020-07-20 06:42:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:42:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:42:39,887 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:42:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:42:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:42:40,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780191837] [2020-07-20 06:42:40,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:42:40,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:42:40,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453853901] [2020-07-20 06:42:40,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:42:40,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:42:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:42:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:42:40,195 INFO L87 Difference]: Start difference. First operand 108755 states and 175647 transitions. Second operand 6 states. [2020-07-20 06:42:41,341 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 06:43:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:43:03,217 INFO L93 Difference]: Finished difference Result 229767 states and 368601 transitions. [2020-07-20 06:43:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:43:03,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 505 [2020-07-20 06:43:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:43:03,376 INFO L225 Difference]: With dead ends: 229767 [2020-07-20 06:43:03,376 INFO L226 Difference]: Without dead ends: 145445 [2020-07-20 06:43:03,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:43:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145445 states. [2020-07-20 06:43:12,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145445 to 145443. [2020-07-20 06:43:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145443 states. [2020-07-20 06:43:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145443 states to 145443 states and 233351 transitions. [2020-07-20 06:43:12,632 INFO L78 Accepts]: Start accepts. Automaton has 145443 states and 233351 transitions. Word has length 505 [2020-07-20 06:43:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:43:12,632 INFO L479 AbstractCegarLoop]: Abstraction has 145443 states and 233351 transitions. [2020-07-20 06:43:12,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:43:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 145443 states and 233351 transitions. [2020-07-20 06:43:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 06:43:12,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:43:12,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:43:12,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 06:43:12,693 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:43:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:43:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1930360351, now seen corresponding path program 1 times [2020-07-20 06:43:12,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:43:12,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916746495] [2020-07-20 06:43:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:43:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:43:14,232 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:43:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:43:14,944 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 06:43:14,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916746495] [2020-07-20 06:43:14,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:43:14,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 06:43:14,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066167900] [2020-07-20 06:43:14,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:43:14,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:43:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:43:14,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:43:14,946 INFO L87 Difference]: Start difference. First operand 145443 states and 233351 transitions. Second operand 9 states. [2020-07-20 06:43:15,974 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-07-20 06:43:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:43:49,987 INFO L93 Difference]: Finished difference Result 394057 states and 630473 transitions. [2020-07-20 06:43:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 06:43:49,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 505 [2020-07-20 06:43:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:43:50,337 INFO L225 Difference]: With dead ends: 394057 [2020-07-20 06:43:50,337 INFO L226 Difference]: Without dead ends: 274199 [2020-07-20 06:43:50,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:43:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274199 states. [2020-07-20 06:44:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274199 to 182363. [2020-07-20 06:44:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182363 states. [2020-07-20 06:44:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182363 states to 182363 states and 286999 transitions. [2020-07-20 06:44:08,093 INFO L78 Accepts]: Start accepts. Automaton has 182363 states and 286999 transitions. Word has length 505 [2020-07-20 06:44:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:44:08,094 INFO L479 AbstractCegarLoop]: Abstraction has 182363 states and 286999 transitions. [2020-07-20 06:44:08,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:44:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 182363 states and 286999 transitions. [2020-07-20 06:44:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 06:44:08,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:44:08,166 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, 1, 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 06:44:08,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 06:44:08,166 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:44:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:44:08,167 INFO L82 PathProgramCache]: Analyzing trace with hash -16341642, now seen corresponding path program 1 times [2020-07-20 06:44:08,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:44:08,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292394261] [2020-07-20 06:44:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:44:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:44:10,095 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:44:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:44:10,332 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 06:44:10,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292394261] [2020-07-20 06:44:10,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:44:10,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:44:10,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932254720] [2020-07-20 06:44:10,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:44:10,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:44:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:44:10,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:44:10,334 INFO L87 Difference]: Start difference. First operand 182363 states and 286999 transitions. Second operand 5 states. [2020-07-20 06:44:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:44:52,229 INFO L93 Difference]: Finished difference Result 538494 states and 847882 transitions. [2020-07-20 06:44:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:44:52,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-20 06:44:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:44:52,633 INFO L225 Difference]: With dead ends: 538494 [2020-07-20 06:44:52,633 INFO L226 Difference]: Without dead ends: 357567 [2020-07-20 06:44:57,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:44:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357567 states. [2020-07-20 06:45:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357567 to 357565. [2020-07-20 06:45:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357565 states. [2020-07-20 06:45:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357565 states to 357565 states and 561633 transitions. [2020-07-20 06:45:22,723 INFO L78 Accepts]: Start accepts. Automaton has 357565 states and 561633 transitions. Word has length 505 [2020-07-20 06:45:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:45:22,724 INFO L479 AbstractCegarLoop]: Abstraction has 357565 states and 561633 transitions. [2020-07-20 06:45:22,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:45:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 357565 states and 561633 transitions. [2020-07-20 06:45:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 06:45:22,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:45:22,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:45:22,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 06:45:22,876 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:45:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:45:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1472156648, now seen corresponding path program 1 times [2020-07-20 06:45:22,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:45:22,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490697315] [2020-07-20 06:45:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:45:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:45:24,222 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:45:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:45:25,185 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 06:45:25,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490697315] [2020-07-20 06:45:25,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:45:25,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:45:25,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046184536] [2020-07-20 06:45:25,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:45:25,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:45:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:45:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:45:25,188 INFO L87 Difference]: Start difference. First operand 357565 states and 561633 transitions. Second operand 4 states. [2020-07-20 06:46:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:46:42,071 INFO L93 Difference]: Finished difference Result 1057198 states and 1658826 transitions. [2020-07-20 06:46:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:46:42,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-20 06:46:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:46:42,995 INFO L225 Difference]: With dead ends: 1057198 [2020-07-20 06:46:42,995 INFO L226 Difference]: Without dead ends: 704312 [2020-07-20 06:46:43,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:46:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704312 states. [2020-07-20 06:47:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704312 to 704310. [2020-07-20 06:47:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704310 states. [2020-07-20 06:47:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704310 states to 704310 states and 1102125 transitions. [2020-07-20 06:47:52,356 INFO L78 Accepts]: Start accepts. Automaton has 704310 states and 1102125 transitions. Word has length 506 [2020-07-20 06:47:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:47:52,357 INFO L479 AbstractCegarLoop]: Abstraction has 704310 states and 1102125 transitions. [2020-07-20 06:47:52,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:47:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 704310 states and 1102125 transitions. [2020-07-20 06:47:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 06:47:52,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:47:52,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:47:52,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 06:47:52,681 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:47:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:47:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -303913291, now seen corresponding path program 1 times [2020-07-20 06:47:52,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:47:52,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743049147] [2020-07-20 06:47:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75373d94 [2020-07-20 06:47:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:47:55,274 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 06:47:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:47:55,417 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 06:47:55,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743049147] [2020-07-20 06:47:55,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:47:55,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:47:55,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254062457] [2020-07-20 06:47:55,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:47:55,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:47:55,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:47:55,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:47:55,420 INFO L87 Difference]: Start difference. First operand 704310 states and 1102125 transitions. Second operand 5 states. [2020-07-20 06:49:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:49:27,334 INFO L93 Difference]: Finished difference Result 1501371 states and 2355621 transitions. [2020-07-20 06:49:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:49:27,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-07-20 06:49:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:49:28,357 INFO L225 Difference]: With dead ends: 1501371 [2020-07-20 06:49:28,357 INFO L226 Difference]: Without dead ends: 753507 [2020-07-20 06:49:29,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:49:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753507 states.