/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:46:47,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:46:47,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:46:47,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:46:47,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:46:47,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:46:47,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:46:47,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:46:47,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:46:47,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:46:47,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:46:47,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:46:47,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:46:47,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:46:47,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:46:47,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:46:47,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:46:47,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:46:47,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:46:47,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:46:47,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:46:47,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:46:47,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:46:47,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:46:47,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:46:47,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:46:47,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:46:47,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:46:47,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:46:47,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:46:47,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:46:47,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:46:47,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:46:47,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:46:47,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:46:47,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:46:47,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:46:47,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:46:47,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:46:47,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:46:47,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:46:47,236 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 [2020-07-07 11:46:47,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:46:47,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:46:47,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:46:47,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:46:47,260 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:46:47,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:46:47,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:46:47,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:46:47,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:46:47,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:46:47,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:46:47,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:46:47,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:46:47,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:46:47,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:46:47,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:46:47,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:46:47,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:46:47,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:46:47,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:46:47,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:46:47,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:46:47,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:46:47,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:46:47,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:46:47,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:46:47,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:46:47,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:46:47,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:46:47,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:46:47,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:46:47,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:46:47,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:46:47,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:46:47,547 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:46:47,548 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:46:47,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/279cbf6f5/6ab4d5153636479cb4e20f14d434350a/FLAG45fccc318 [2020-07-07 11:46:48,185 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:46:48,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:46:48,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/279cbf6f5/6ab4d5153636479cb4e20f14d434350a/FLAG45fccc318 [2020-07-07 11:46:48,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/279cbf6f5/6ab4d5153636479cb4e20f14d434350a [2020-07-07 11:46:48,439 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:46:48,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:46:48,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:46:48,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:46:48,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:46:48,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:46:48" (1/1) ... [2020-07-07 11:46:48,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b80080d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:48, skipping insertion in model container [2020-07-07 11:46:48,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:46:48" (1/1) ... [2020-07-07 11:46:48,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:46:48,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:46:49,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:46:49,500 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:46:50,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:46:50,053 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:46:50,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50 WrapperNode [2020-07-07 11:46:50,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:46:50,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:46:50,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:46:50,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:46:50,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (1/1) ... [2020-07-07 11:46:50,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:46:50,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:46:50,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:46:50,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:46:50,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (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 [2020-07-07 11:46:50,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:46:50,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:46:50,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:46:50,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:46:50,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:46:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:46:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-07 11:46:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:46:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:46:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:46:50,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:46:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:46:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:46:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:46:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:46:50,321 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:46:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:46:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:46:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:46:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:46:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:46:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:46:52,593 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:46:52,594 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:46:52,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:46:52 BoogieIcfgContainer [2020-07-07 11:46:52,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:46:52,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:46:52,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:46:52,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:46:52,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:46:48" (1/3) ... [2020-07-07 11:46:52,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b7c85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:46:52, skipping insertion in model container [2020-07-07 11:46:52,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:46:50" (2/3) ... [2020-07-07 11:46:52,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b7c85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:46:52, skipping insertion in model container [2020-07-07 11:46:52,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:46:52" (3/3) ... [2020-07-07 11:46:52,615 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:46:52,627 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:46:52,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:46:52,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:46:52,683 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:46:52,684 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:46:52,684 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:46:52,684 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:46:52,684 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:46:52,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:46:52,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:46:52,685 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:46:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-07 11:46:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:46:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:52,767 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] [2020-07-07 11:46:52,769 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:52,775 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-07 11:46:52,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:52,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251881184] [2020-07-07 11:46:52,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:54,776 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:55,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251881184] [2020-07-07 11:46:55,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:55,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:55,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69187495] [2020-07-07 11:46:55,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:55,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:55,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:55,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:55,119 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-07 11:46:55,625 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:47:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:00,179 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-07 11:47:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:47:00,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:47:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:00,245 INFO L225 Difference]: With dead ends: 1489 [2020-07-07 11:47:00,245 INFO L226 Difference]: Without dead ends: 1273 [2020-07-07 11:47:00,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-07 11:47:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-07 11:47:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-07 11:47:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-07 11:47:00,407 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-07 11:47:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:00,413 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-07 11:47:00,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-07 11:47:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:47:00,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:00,424 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] [2020-07-07 11:47:00,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:47:00,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-07 11:47:00,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:00,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207257814] [2020-07-07 11:47:00,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:01,458 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:01,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207257814] [2020-07-07 11:47:01,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:01,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:01,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362630229] [2020-07-07 11:47:01,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:01,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:01,900 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-07-07 11:47:02,404 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:47:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:06,369 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-07 11:47:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:47:06,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:47:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:06,383 INFO L225 Difference]: With dead ends: 2607 [2020-07-07 11:47:06,384 INFO L226 Difference]: Without dead ends: 2225 [2020-07-07 11:47:06,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-07 11:47:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-07 11:47:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-07 11:47:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-07 11:47:06,485 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-07 11:47:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:06,486 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-07 11:47:06,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-07 11:47:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:47:06,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:06,502 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] [2020-07-07 11:47:06,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:47:06,503 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:06,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-07 11:47:06,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:06,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766301419] [2020-07-07 11:47:06,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:07,350 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:07,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766301419] [2020-07-07 11:47:07,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:07,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:07,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913064491] [2020-07-07 11:47:07,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:07,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:07,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:07,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:07,625 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-07-07 11:47:08,018 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:47:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:11,817 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-07 11:47:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:47:11,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:47:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:11,838 INFO L225 Difference]: With dead ends: 4715 [2020-07-07 11:47:11,838 INFO L226 Difference]: Without dead ends: 4049 [2020-07-07 11:47:11,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-07 11:47:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-07 11:47:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-07 11:47:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-07 11:47:11,969 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-07 11:47:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:11,970 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-07 11:47:11,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-07 11:47:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:47:11,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:11,981 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] [2020-07-07 11:47:11,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:47:11,982 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-07 11:47:11,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:11,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093398146] [2020-07-07 11:47:11,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:13,021 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:13,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093398146] [2020-07-07 11:47:13,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:13,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:47:13,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268866186] [2020-07-07 11:47:13,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:47:13,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:47:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:13,167 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-07-07 11:47:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:19,276 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-07-07 11:47:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:47:19,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-07-07 11:47:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:19,314 INFO L225 Difference]: With dead ends: 11998 [2020-07-07 11:47:19,315 INFO L226 Difference]: Without dead ends: 7966 [2020-07-07 11:47:19,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:47:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-07-07 11:47:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-07-07 11:47:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-07-07 11:47:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-07-07 11:47:19,646 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-07-07 11:47:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:19,646 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-07-07 11:47:19,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:47:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-07-07 11:47:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-07 11:47:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:19,665 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] [2020-07-07 11:47:19,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:47:19,666 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-07-07 11:47:19,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:19,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813882724] [2020-07-07 11:47:19,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:20,315 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:20,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813882724] [2020-07-07 11:47:20,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:20,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:20,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600871779] [2020-07-07 11:47:20,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:20,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:20,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:20,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:20,523 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-07-07 11:47:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:28,006 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-07-07 11:47:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:28,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-07 11:47:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:28,060 INFO L225 Difference]: With dead ends: 23441 [2020-07-07 11:47:28,061 INFO L226 Difference]: Without dead ends: 15606 [2020-07-07 11:47:28,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-07-07 11:47:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-07-07 11:47:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-07-07 11:47:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-07-07 11:47:28,624 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-07-07 11:47:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:28,625 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-07-07 11:47:28,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-07-07 11:47:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-07 11:47:28,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:28,652 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] [2020-07-07 11:47:28,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:47:28,653 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-07-07 11:47:28,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:28,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414366247] [2020-07-07 11:47:28,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:29,328 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:29,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414366247] [2020-07-07 11:47:29,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:29,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:29,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273167237] [2020-07-07 11:47:29,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:29,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:29,503 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-07-07 11:47:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:37,218 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-07-07 11:47:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:37,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-07 11:47:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:37,284 INFO L225 Difference]: With dead ends: 46737 [2020-07-07 11:47:37,284 INFO L226 Difference]: Without dead ends: 31175 [2020-07-07 11:47:37,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-07-07 11:47:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-07-07 11:47:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-07-07 11:47:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-07-07 11:47:37,968 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-07-07 11:47:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:37,968 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-07-07 11:47:37,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-07-07 11:47:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-07 11:47:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:37,991 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] [2020-07-07 11:47:37,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:47:37,991 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-07-07 11:47:37,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:37,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588945639] [2020-07-07 11:47:37,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:39,158 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:39,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588945639] [2020-07-07 11:47:39,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:39,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:39,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706283325] [2020-07-07 11:47:39,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:39,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:39,249 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states. [2020-07-07 11:47:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:46,969 INFO L93 Difference]: Finished difference Result 46756 states and 71576 transitions. [2020-07-07 11:47:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:46,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-07-07 11:47:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:47,028 INFO L225 Difference]: With dead ends: 46756 [2020-07-07 11:47:47,028 INFO L226 Difference]: Without dead ends: 31193 [2020-07-07 11:47:47,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31193 states. [2020-07-07 11:47:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31193 to 15641. [2020-07-07 11:47:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15641 states. [2020-07-07 11:47:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 23942 transitions. [2020-07-07 11:47:47,590 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 23942 transitions. Word has length 329 [2020-07-07 11:47:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:47,591 INFO L479 AbstractCegarLoop]: Abstraction has 15641 states and 23942 transitions. [2020-07-07 11:47:47,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 23942 transitions. [2020-07-07 11:47:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:47:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:47,610 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] [2020-07-07 11:47:47,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:47:47,611 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1733447043, now seen corresponding path program 1 times [2020-07-07 11:47:47,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:47,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997349699] [2020-07-07 11:47:47,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:48,195 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:48,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997349699] [2020-07-07 11:47:48,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:48,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:48,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818728434] [2020-07-07 11:47:48,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:48,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:48,315 INFO L87 Difference]: Start difference. First operand 15641 states and 23942 transitions. Second operand 4 states. [2020-07-07 11:47:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:56,148 INFO L93 Difference]: Finished difference Result 44290 states and 67647 transitions. [2020-07-07 11:47:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:56,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:47:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:56,192 INFO L225 Difference]: With dead ends: 44290 [2020-07-07 11:47:56,192 INFO L226 Difference]: Without dead ends: 28894 [2020-07-07 11:47:56,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28894 states. [2020-07-07 11:47:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28894 to 28892. [2020-07-07 11:47:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28892 states. [2020-07-07 11:47:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28892 states to 28892 states and 43902 transitions. [2020-07-07 11:47:57,420 INFO L78 Accepts]: Start accepts. Automaton has 28892 states and 43902 transitions. Word has length 330 [2020-07-07 11:47:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:57,421 INFO L479 AbstractCegarLoop]: Abstraction has 28892 states and 43902 transitions. [2020-07-07 11:47:57,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 28892 states and 43902 transitions. [2020-07-07 11:47:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:47:57,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:57,447 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] [2020-07-07 11:47:57,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:47:57,447 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2142783200, now seen corresponding path program 1 times [2020-07-07 11:47:57,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:57,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132613603] [2020-07-07 11:47:57,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:58,366 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:58,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132613603] [2020-07-07 11:47:58,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:58,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:47:58,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120505439] [2020-07-07 11:47:58,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:47:58,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:58,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:47:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:58,474 INFO L87 Difference]: Start difference. First operand 28892 states and 43902 transitions. Second operand 5 states. [2020-07-07 11:48:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:04,577 INFO L93 Difference]: Finished difference Result 59161 states and 89885 transitions. [2020-07-07 11:48:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:48:04,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-07 11:48:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:04,607 INFO L225 Difference]: With dead ends: 59161 [2020-07-07 11:48:04,607 INFO L226 Difference]: Without dead ends: 29761 [2020-07-07 11:48:04,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:48:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29761 states. [2020-07-07 11:48:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29761 to 29759. [2020-07-07 11:48:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29759 states. [2020-07-07 11:48:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29759 states to 29759 states and 45040 transitions. [2020-07-07 11:48:06,535 INFO L78 Accepts]: Start accepts. Automaton has 29759 states and 45040 transitions. Word has length 330 [2020-07-07 11:48:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:06,536 INFO L479 AbstractCegarLoop]: Abstraction has 29759 states and 45040 transitions. [2020-07-07 11:48:06,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:48:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 29759 states and 45040 transitions. [2020-07-07 11:48:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-07 11:48:06,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:06,553 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] [2020-07-07 11:48:06,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:48:06,553 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 82673009, now seen corresponding path program 1 times [2020-07-07 11:48:06,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:06,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075556245] [2020-07-07 11:48:06,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:07,320 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:07,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075556245] [2020-07-07 11:48:07,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:07,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:07,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140123679] [2020-07-07 11:48:07,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:07,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:07,458 INFO L87 Difference]: Start difference. First operand 29759 states and 45040 transitions. Second operand 4 states. [2020-07-07 11:48:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:13,405 INFO L93 Difference]: Finished difference Result 70125 states and 107206 transitions. [2020-07-07 11:48:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:13,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-07 11:48:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:13,446 INFO L225 Difference]: With dead ends: 70125 [2020-07-07 11:48:13,446 INFO L226 Difference]: Without dead ends: 42593 [2020-07-07 11:48:13,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42593 states. [2020-07-07 11:48:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42593 to 37231. [2020-07-07 11:48:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37231 states. [2020-07-07 11:48:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37231 states to 37231 states and 57292 transitions. [2020-07-07 11:48:14,820 INFO L78 Accepts]: Start accepts. Automaton has 37231 states and 57292 transitions. Word has length 331 [2020-07-07 11:48:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:14,820 INFO L479 AbstractCegarLoop]: Abstraction has 37231 states and 57292 transitions. [2020-07-07 11:48:14,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 37231 states and 57292 transitions. [2020-07-07 11:48:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:48:14,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:14,838 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] [2020-07-07 11:48:14,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:48:14,839 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash 942168383, now seen corresponding path program 1 times [2020-07-07 11:48:14,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:14,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059326459] [2020-07-07 11:48:14,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:15,325 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:15,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059326459] [2020-07-07 11:48:15,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:15,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:15,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812658528] [2020-07-07 11:48:15,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:15,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:15,415 INFO L87 Difference]: Start difference. First operand 37231 states and 57292 transitions. Second operand 4 states. [2020-07-07 11:48:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:22,055 INFO L93 Difference]: Finished difference Result 110821 states and 170399 transitions. [2020-07-07 11:48:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:22,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-07 11:48:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:22,121 INFO L225 Difference]: With dead ends: 110821 [2020-07-07 11:48:22,121 INFO L226 Difference]: Without dead ends: 74043 [2020-07-07 11:48:22,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74043 states. [2020-07-07 11:48:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74043 to 37289. [2020-07-07 11:48:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37289 states. [2020-07-07 11:48:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37289 states to 37289 states and 57367 transitions. [2020-07-07 11:48:24,064 INFO L78 Accepts]: Start accepts. Automaton has 37289 states and 57367 transitions. Word has length 332 [2020-07-07 11:48:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:24,064 INFO L479 AbstractCegarLoop]: Abstraction has 37289 states and 57367 transitions. [2020-07-07 11:48:24,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37289 states and 57367 transitions. [2020-07-07 11:48:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:48:24,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:24,086 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] [2020-07-07 11:48:24,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:48:24,087 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:24,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1231527171, now seen corresponding path program 1 times [2020-07-07 11:48:24,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:24,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178992471] [2020-07-07 11:48:24,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:24,740 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:24,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178992471] [2020-07-07 11:48:24,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:24,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:24,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645965520] [2020-07-07 11:48:24,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:24,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:24,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:24,885 INFO L87 Difference]: Start difference. First operand 37289 states and 57367 transitions. Second operand 4 states. [2020-07-07 11:48:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:34,900 INFO L93 Difference]: Finished difference Result 109952 states and 168910 transitions. [2020-07-07 11:48:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:34,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-07 11:48:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:34,989 INFO L225 Difference]: With dead ends: 109952 [2020-07-07 11:48:34,989 INFO L226 Difference]: Without dead ends: 72948 [2020-07-07 11:48:35,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72948 states. [2020-07-07 11:48:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72948 to 72946. [2020-07-07 11:48:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72946 states. [2020-07-07 11:48:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72946 states to 72946 states and 111466 transitions. [2020-07-07 11:48:40,179 INFO L78 Accepts]: Start accepts. Automaton has 72946 states and 111466 transitions. Word has length 332 [2020-07-07 11:48:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:40,179 INFO L479 AbstractCegarLoop]: Abstraction has 72946 states and 111466 transitions. [2020-07-07 11:48:40,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 72946 states and 111466 transitions. [2020-07-07 11:48:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:48:40,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:40,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:48:40,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:48:40,211 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash 574493146, now seen corresponding path program 1 times [2020-07-07 11:48:40,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:40,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530219610] [2020-07-07 11:48:40,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:40,900 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:40,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530219610] [2020-07-07 11:48:40,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:40,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:48:40,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19130593] [2020-07-07 11:48:40,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:48:40,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:48:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:48:40,993 INFO L87 Difference]: Start difference. First operand 72946 states and 111466 transitions. Second operand 5 states. [2020-07-07 11:48:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:49,419 INFO L93 Difference]: Finished difference Result 149624 states and 228357 transitions. [2020-07-07 11:48:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:48:49,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-07-07 11:48:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:49,487 INFO L225 Difference]: With dead ends: 149624 [2020-07-07 11:48:49,487 INFO L226 Difference]: Without dead ends: 75480 [2020-07-07 11:48:49,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:48:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75480 states. [2020-07-07 11:48:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75480 to 75478. [2020-07-07 11:48:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75478 states. [2020-07-07 11:48:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75478 states to 75478 states and 114725 transitions. [2020-07-07 11:48:52,700 INFO L78 Accepts]: Start accepts. Automaton has 75478 states and 114725 transitions. Word has length 332 [2020-07-07 11:48:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:52,701 INFO L479 AbstractCegarLoop]: Abstraction has 75478 states and 114725 transitions. [2020-07-07 11:48:52,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:48:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 75478 states and 114725 transitions. [2020-07-07 11:48:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:48:52,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:52,732 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] [2020-07-07 11:48:52,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:48:52,733 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash -234242260, now seen corresponding path program 1 times [2020-07-07 11:48:52,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:52,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183827333] [2020-07-07 11:48:52,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:53,512 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:53,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183827333] [2020-07-07 11:48:53,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:53,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:48:53,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909021027] [2020-07-07 11:48:53,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:48:53,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:48:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:48:53,631 INFO L87 Difference]: Start difference. First operand 75478 states and 114725 transitions. Second operand 5 states. [2020-07-07 11:49:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:12,980 INFO L93 Difference]: Finished difference Result 284853 states and 432320 transitions. [2020-07-07 11:49:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:49:12,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-07-07 11:49:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:13,209 INFO L225 Difference]: With dead ends: 284853 [2020-07-07 11:49:13,210 INFO L226 Difference]: Without dead ends: 211355 [2020-07-07 11:49:13,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:49:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211355 states. [2020-07-07 11:49:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211355 to 76005. [2020-07-07 11:49:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76005 states. [2020-07-07 11:49:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76005 states to 76005 states and 115485 transitions. [2020-07-07 11:49:19,761 INFO L78 Accepts]: Start accepts. Automaton has 76005 states and 115485 transitions. Word has length 332 [2020-07-07 11:49:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:19,761 INFO L479 AbstractCegarLoop]: Abstraction has 76005 states and 115485 transitions. [2020-07-07 11:49:19,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:49:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 76005 states and 115485 transitions. [2020-07-07 11:49:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:49:19,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:19,793 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] [2020-07-07 11:49:19,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:49:19,793 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:19,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1874773864, now seen corresponding path program 1 times [2020-07-07 11:49:19,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:19,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056105937] [2020-07-07 11:49:19,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:20,294 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:49:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:49:20,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056105937] [2020-07-07 11:49:20,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:20,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:49:20,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910629595] [2020-07-07 11:49:20,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:49:20,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:49:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:49:20,394 INFO L87 Difference]: Start difference. First operand 76005 states and 115485 transitions. Second operand 4 states. [2020-07-07 11:49:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:32,743 INFO L93 Difference]: Finished difference Result 186495 states and 285121 transitions. [2020-07-07 11:49:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:49:32,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-07 11:49:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:32,869 INFO L225 Difference]: With dead ends: 186495 [2020-07-07 11:49:32,869 INFO L226 Difference]: Without dead ends: 118775 [2020-07-07 11:49:32,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:49:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118775 states. [2020-07-07 11:49:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118775 to 102749. [2020-07-07 11:49:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102749 states. [2020-07-07 11:49:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102749 states to 102749 states and 158513 transitions. [2020-07-07 11:49:38,249 INFO L78 Accepts]: Start accepts. Automaton has 102749 states and 158513 transitions. Word has length 334 [2020-07-07 11:49:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:38,249 INFO L479 AbstractCegarLoop]: Abstraction has 102749 states and 158513 transitions. [2020-07-07 11:49:38,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:49:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 102749 states and 158513 transitions. [2020-07-07 11:49:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:49:38,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:38,281 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] [2020-07-07 11:49:38,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:49:38,281 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2052198596, now seen corresponding path program 1 times [2020-07-07 11:49:38,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:38,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105518032] [2020-07-07 11:49:38,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:38,817 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:49:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:49:38,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105518032] [2020-07-07 11:49:38,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:38,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:49:38,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586963575] [2020-07-07 11:49:38,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:49:38,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:49:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:49:38,918 INFO L87 Difference]: Start difference. First operand 102749 states and 158513 transitions. Second operand 4 states. [2020-07-07 11:49:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:58,350 INFO L93 Difference]: Finished difference Result 302297 states and 465959 transitions. [2020-07-07 11:49:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:49:58,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-07 11:49:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:58,582 INFO L225 Difference]: With dead ends: 302297 [2020-07-07 11:49:58,582 INFO L226 Difference]: Without dead ends: 202271 [2020-07-07 11:49:58,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:49:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202271 states. [2020-07-07 11:50:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202271 to 103017. [2020-07-07 11:50:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103017 states. [2020-07-07 11:50:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103017 states to 103017 states and 158873 transitions. [2020-07-07 11:50:05,427 INFO L78 Accepts]: Start accepts. Automaton has 103017 states and 158873 transitions. Word has length 334 [2020-07-07 11:50:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:50:05,427 INFO L479 AbstractCegarLoop]: Abstraction has 103017 states and 158873 transitions. [2020-07-07 11:50:05,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:50:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 103017 states and 158873 transitions. [2020-07-07 11:50:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:50:05,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:50:05,464 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] [2020-07-07 11:50:05,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:50:05,464 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:50:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:50:05,464 INFO L82 PathProgramCache]: Analyzing trace with hash 924020310, now seen corresponding path program 1 times [2020-07-07 11:50:05,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:50:05,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150995763] [2020-07-07 11:50:05,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:50:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:06,038 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:50:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:50:07,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150995763] [2020-07-07 11:50:07,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:50:07,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:50:07,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104585351] [2020-07-07 11:50:07,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:50:07,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:50:07,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:50:07,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:50:07,994 INFO L87 Difference]: Start difference. First operand 103017 states and 158873 transitions. Second operand 6 states. [2020-07-07 11:50:08,460 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:50:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:50:18,626 INFO L93 Difference]: Finished difference Result 198957 states and 307134 transitions. [2020-07-07 11:50:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:50:18,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-07-07 11:50:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:50:18,744 INFO L225 Difference]: With dead ends: 198957 [2020-07-07 11:50:18,744 INFO L226 Difference]: Without dead ends: 103017 [2020-07-07 11:50:18,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:50:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103017 states. [2020-07-07 11:50:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103017 to 103017. [2020-07-07 11:50:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103017 states. [2020-07-07 11:50:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103017 states to 103017 states and 157871 transitions. [2020-07-07 11:50:27,408 INFO L78 Accepts]: Start accepts. Automaton has 103017 states and 157871 transitions. Word has length 334 [2020-07-07 11:50:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:50:27,409 INFO L479 AbstractCegarLoop]: Abstraction has 103017 states and 157871 transitions. [2020-07-07 11:50:27,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:50:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 103017 states and 157871 transitions. [2020-07-07 11:50:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:50:27,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:50:27,441 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] [2020-07-07 11:50:27,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:50:27,441 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:50:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:50:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2073937905, now seen corresponding path program 1 times [2020-07-07 11:50:27,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:50:27,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687779787] [2020-07-07 11:50:27,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:50:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:28,121 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:50:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:50:28,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687779787] [2020-07-07 11:50:28,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:50:28,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:50:28,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24784454] [2020-07-07 11:50:28,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:50:28,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:50:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:50:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:50:28,244 INFO L87 Difference]: Start difference. First operand 103017 states and 157871 transitions. Second operand 5 states. [2020-07-07 11:50:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:50:47,776 INFO L93 Difference]: Finished difference Result 304088 states and 465970 transitions. [2020-07-07 11:50:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:50:47,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-07 11:50:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:50:48,004 INFO L225 Difference]: With dead ends: 304088 [2020-07-07 11:50:48,004 INFO L226 Difference]: Without dead ends: 201844 [2020-07-07 11:50:48,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:50:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201844 states. [2020-07-07 11:51:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201844 to 201842. [2020-07-07 11:51:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201842 states. [2020-07-07 11:51:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201842 states to 201842 states and 308017 transitions. [2020-07-07 11:51:05,073 INFO L78 Accepts]: Start accepts. Automaton has 201842 states and 308017 transitions. Word has length 334 [2020-07-07 11:51:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:51:05,073 INFO L479 AbstractCegarLoop]: Abstraction has 201842 states and 308017 transitions. [2020-07-07 11:51:05,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:51:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 201842 states and 308017 transitions. [2020-07-07 11:51:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-07 11:51:05,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:51:05,138 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] [2020-07-07 11:51:05,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 11:51:05,138 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:51:05,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:51:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash -860846706, now seen corresponding path program 1 times [2020-07-07 11:51:05,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:51:05,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771953709] [2020-07-07 11:51:05,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:51:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:05,651 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:51:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:51:05,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771953709] [2020-07-07 11:51:05,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:51:05,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:51:05,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103003903] [2020-07-07 11:51:05,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:51:05,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:51:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:51:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:51:05,735 INFO L87 Difference]: Start difference. First operand 201842 states and 308017 transitions. Second operand 4 states. [2020-07-07 11:51:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:51:42,018 INFO L93 Difference]: Finished difference Result 594866 states and 907239 transitions. [2020-07-07 11:51:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:51:42,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-07 11:51:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:51:42,537 INFO L225 Difference]: With dead ends: 594866 [2020-07-07 11:51:42,537 INFO L226 Difference]: Without dead ends: 397812 [2020-07-07 11:51:42,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:51:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397812 states. [2020-07-07 11:52:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397812 to 202286. [2020-07-07 11:52:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202286 states. [2020-07-07 11:52:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202286 states to 202286 states and 308449 transitions. [2020-07-07 11:52:03,421 INFO L78 Accepts]: Start accepts. Automaton has 202286 states and 308449 transitions. Word has length 335 [2020-07-07 11:52:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:52:03,421 INFO L479 AbstractCegarLoop]: Abstraction has 202286 states and 308449 transitions. [2020-07-07 11:52:03,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:52:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 202286 states and 308449 transitions. [2020-07-07 11:52:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 11:52:03,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:52:03,493 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] [2020-07-07 11:52:03,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 11:52:03,493 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:52:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:52:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 162534671, now seen corresponding path program 1 times [2020-07-07 11:52:03,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:52:03,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161791150] [2020-07-07 11:52:03,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:52:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:04,488 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:52:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:52:04,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161791150] [2020-07-07 11:52:04,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:52:04,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:52:04,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263794476] [2020-07-07 11:52:04,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:52:04,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:52:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:52:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:52:04,556 INFO L87 Difference]: Start difference. First operand 202286 states and 308449 transitions. Second operand 5 states. [2020-07-07 11:52:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:52:28,095 INFO L93 Difference]: Finished difference Result 293099 states and 446788 transitions. [2020-07-07 11:52:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:52:28,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-07 11:52:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:28,326 INFO L225 Difference]: With dead ends: 293099 [2020-07-07 11:52:28,326 INFO L226 Difference]: Without dead ends: 202288 [2020-07-07 11:52:28,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:52:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202288 states. [2020-07-07 11:52:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202288 to 198134. [2020-07-07 11:52:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198134 states. [2020-07-07 11:52:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198134 states to 198134 states and 302472 transitions. [2020-07-07 11:52:48,327 INFO L78 Accepts]: Start accepts. Automaton has 198134 states and 302472 transitions. Word has length 336 [2020-07-07 11:52:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:52:48,327 INFO L479 AbstractCegarLoop]: Abstraction has 198134 states and 302472 transitions. [2020-07-07 11:52:48,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:52:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 198134 states and 302472 transitions. [2020-07-07 11:52:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-07 11:52:48,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:52:48,387 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] [2020-07-07 11:52:48,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 11:52:48,387 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:52:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:52:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash 159027383, now seen corresponding path program 1 times [2020-07-07 11:52:48,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:52:48,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467323394] [2020-07-07 11:52:48,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:52:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:49,482 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:52:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:52:49,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467323394] [2020-07-07 11:52:49,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:52:49,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:52:49,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446707013] [2020-07-07 11:52:49,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:52:49,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:52:49,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:52:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:49,580 INFO L87 Difference]: Start difference. First operand 198134 states and 302472 transitions. Second operand 4 states. [2020-07-07 11:53:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:53:26,141 INFO L93 Difference]: Finished difference Result 578975 states and 882497 transitions. [2020-07-07 11:53:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:53:26,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-07 11:53:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:53:26,639 INFO L225 Difference]: With dead ends: 578975 [2020-07-07 11:53:26,639 INFO L226 Difference]: Without dead ends: 385629 [2020-07-07 11:53:26,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:53:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385629 states. [2020-07-07 11:54:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385629 to 385627. [2020-07-07 11:54:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385627 states. [2020-07-07 11:54:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385627 states to 385627 states and 584899 transitions. [2020-07-07 11:54:01,939 INFO L78 Accepts]: Start accepts. Automaton has 385627 states and 584899 transitions. Word has length 338 [2020-07-07 11:54:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:54:01,940 INFO L479 AbstractCegarLoop]: Abstraction has 385627 states and 584899 transitions. [2020-07-07 11:54:01,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:54:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 385627 states and 584899 transitions. [2020-07-07 11:54:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 11:54:02,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:54:02,066 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] [2020-07-07 11:54:02,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:54:02,066 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:54:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:54:02,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1971664460, now seen corresponding path program 1 times [2020-07-07 11:54:02,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:54:02,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121364994] [2020-07-07 11:54:02,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:54:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:02,571 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:54:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:54:02,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121364994] [2020-07-07 11:54:02,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:54:02,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:54:02,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82231205] [2020-07-07 11:54:02,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:54:02,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:54:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:54:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:54:02,646 INFO L87 Difference]: Start difference. First operand 385627 states and 584899 transitions. Second operand 4 states. [2020-07-07 11:55:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:55:19,753 INFO L93 Difference]: Finished difference Result 1150993 states and 1745423 transitions. [2020-07-07 11:55:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:55:19,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-07 11:55:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:55:20,767 INFO L225 Difference]: With dead ends: 1150993 [2020-07-07 11:55:20,768 INFO L226 Difference]: Without dead ends: 767510 [2020-07-07 11:55:21,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:55:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767510 states. [2020-07-07 11:56:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767510 to 386115. [2020-07-07 11:56:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386115 states. [2020-07-07 11:56:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386115 states to 386115 states and 585417 transitions. [2020-07-07 11:56:04,440 INFO L78 Accepts]: Start accepts. Automaton has 386115 states and 585417 transitions. Word has length 339 [2020-07-07 11:56:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:56:04,441 INFO L479 AbstractCegarLoop]: Abstraction has 386115 states and 585417 transitions. [2020-07-07 11:56:04,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:56:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 386115 states and 585417 transitions. [2020-07-07 11:56:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-07 11:56:04,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:56:04,587 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] [2020-07-07 11:56:04,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 11:56:04,587 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:56:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:56:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1127711503, now seen corresponding path program 1 times [2020-07-07 11:56:04,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:56:04,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496684152] [2020-07-07 11:56:04,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:56:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:56:05,974 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:56:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:56:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:56:06,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496684152] [2020-07-07 11:56:06,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:56:06,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:56:06,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722664163] [2020-07-07 11:56:06,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:56:06,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:56:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:56:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:56:06,044 INFO L87 Difference]: Start difference. First operand 386115 states and 585417 transitions. Second operand 5 states. [2020-07-07 11:56:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:56:52,346 INFO L93 Difference]: Finished difference Result 784450 states and 1187788 transitions. [2020-07-07 11:56:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:56:52,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2020-07-07 11:56:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:56:52,890 INFO L225 Difference]: With dead ends: 784450 [2020-07-07 11:56:52,890 INFO L226 Difference]: Without dead ends: 393631 [2020-07-07 11:56:53,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:56:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393631 states. [2020-07-07 11:57:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393631 to 393629. [2020-07-07 11:57:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393629 states. [2020-07-07 11:57:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393629 states to 393629 states and 593132 transitions. [2020-07-07 11:57:33,963 INFO L78 Accepts]: Start accepts. Automaton has 393629 states and 593132 transitions. Word has length 340 [2020-07-07 11:57:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:57:33,963 INFO L479 AbstractCegarLoop]: Abstraction has 393629 states and 593132 transitions. [2020-07-07 11:57:33,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:57:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 393629 states and 593132 transitions. [2020-07-07 11:57:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-07 11:57:34,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:57:34,096 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] [2020-07-07 11:57:34,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 11:57:34,097 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:57:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:57:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash -542661021, now seen corresponding path program 1 times [2020-07-07 11:57:34,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:57:34,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404136519] [2020-07-07 11:57:34,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:57:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:57:34,628 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:57:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:57:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:57:34,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404136519] [2020-07-07 11:57:34,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:57:34,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:57:34,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955282589] [2020-07-07 11:57:34,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:57:34,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:57:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:57:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:57:34,725 INFO L87 Difference]: Start difference. First operand 393629 states and 593132 transitions. Second operand 4 states. [2020-07-07 11:58:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:58:53,002 INFO L93 Difference]: Finished difference Result 1141315 states and 1716959 transitions. [2020-07-07 11:58:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:58:53,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-07 11:58:53,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:58:54,071 INFO L225 Difference]: With dead ends: 1141315 [2020-07-07 11:58:54,071 INFO L226 Difference]: Without dead ends: 750947 [2020-07-07 11:58:54,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:58:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750947 states.