/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:59:57,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:59:57,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:59:57,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:59:57,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:59:57,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:59:57,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:59:57,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:59:57,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:59:57,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:59:57,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:59:57,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:59:57,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:59:57,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:59:57,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:59:57,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:59:57,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:59:57,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:59:57,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:59:57,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:59:57,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:59:57,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:59:57,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:59:57,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:59:57,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:59:57,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:59:57,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:59:57,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:59:57,219 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 [2020-10-23 18:59:57,245 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:59:57,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:59:57,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:59:57,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:59:57,247 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:59:57,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:59:57,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:59:57,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:59:57,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:59:57,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:59:57,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:59:57,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:59:57,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:59:57,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:59:57,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:59:57,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:59:57,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:59:57,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:59:57,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:59:57,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:59:57,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:59:57,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:59:57,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:59:57,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:59:57,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:59:57,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:59:57,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:59:57,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:59:57,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:59:57,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:59:57,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:59:57,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:59:57,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:59:57,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:59:57,675 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:59:57,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 18:59:57,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda27ca9f/96f8474a36bf42529b6b5b19595fe243/FLAGfaf1a54e3 [2020-10-23 18:59:58,634 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:59:58,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 18:59:58,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda27ca9f/96f8474a36bf42529b6b5b19595fe243/FLAGfaf1a54e3 [2020-10-23 18:59:58,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda27ca9f/96f8474a36bf42529b6b5b19595fe243 [2020-10-23 18:59:58,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:59:58,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:59:58,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:59:58,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:59:58,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:59:58,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:59:58" (1/1) ... [2020-10-23 18:59:58,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dab0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:59:58, skipping insertion in model container [2020-10-23 18:59:58,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:59:58" (1/1) ... [2020-10-23 18:59:58,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:59:58,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:00:00,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:00,671 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:00:01,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:01,627 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:00:01,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01 WrapperNode [2020-10-23 19:00:01,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:01,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:00:01,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:00:01,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:00:01,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:00:01,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:00:01,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:00:01,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:00:01,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (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 [2020-10-23 19:00:01,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:00:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:00:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:00:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:00:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:00:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:00:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:00:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:00:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:00:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:00:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:00:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:00:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:00:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:00:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:00:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:00:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:00:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:00:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:00:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:00:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:00:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:00:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:00:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:00:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:00:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:00:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:00:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:00:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:00:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:00:06,230 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:00:06,231 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:00:06,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:00:06 BoogieIcfgContainer [2020-10-23 19:00:06,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:00:06,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:00:06,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:00:06,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:00:06,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:59:58" (1/3) ... [2020-10-23 19:00:06,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da45314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:00:06, skipping insertion in model container [2020-10-23 19:00:06,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01" (2/3) ... [2020-10-23 19:00:06,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da45314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:00:06, skipping insertion in model container [2020-10-23 19:00:06,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:00:06" (3/3) ... [2020-10-23 19:00:06,251 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:00:06,266 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:00:06,273 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:00:06,288 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:00:06,345 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:00:06,345 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:00:06,345 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:00:06,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:00:06,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:00:06,345 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:00:06,346 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:00:06,346 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:00:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states. [2020-10-23 19:00:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-23 19:00:06,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:06,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:00:06,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash 972701234, now seen corresponding path program 1 times [2020-10-23 19:00:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:06,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567812830] [2020-10-23 19:00:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:09,612 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:00:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:10,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567812830] [2020-10-23 19:00:10,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:10,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:00:10,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65435886] [2020-10-23 19:00:10,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:00:10,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:00:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:00:10,600 INFO L87 Difference]: Start difference. First operand 1397 states. Second operand 5 states. [2020-10-23 19:00:27,021 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-23 19:00:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:00:30,165 INFO L93 Difference]: Finished difference Result 4129 states and 7476 transitions. [2020-10-23 19:00:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 19:00:30,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-10-23 19:00:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:00:30,219 INFO L225 Difference]: With dead ends: 4129 [2020-10-23 19:00:30,219 INFO L226 Difference]: Without dead ends: 2741 [2020-10-23 19:00:30,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:00:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-10-23 19:00:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-10-23 19:00:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-10-23 19:00:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4399 transitions. [2020-10-23 19:00:30,496 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4399 transitions. Word has length 474 [2020-10-23 19:00:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:00:30,498 INFO L481 AbstractCegarLoop]: Abstraction has 2688 states and 4399 transitions. [2020-10-23 19:00:30,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:00:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4399 transitions. [2020-10-23 19:00:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-10-23 19:00:30,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:30,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:00:30,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:00:30,515 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash -421698901, now seen corresponding path program 1 times [2020-10-23 19:00:30,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055805915] [2020-10-23 19:00:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:31,971 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:00:31,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:32,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055805915] [2020-10-23 19:00:32,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:32,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:00:32,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752031881] [2020-10-23 19:00:32,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:00:32,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:00:32,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:00:32,415 INFO L87 Difference]: Start difference. First operand 2688 states and 4399 transitions. Second operand 4 states. [2020-10-23 19:00:49,881 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-23 19:00:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:00:52,648 INFO L93 Difference]: Finished difference Result 7793 states and 12716 transitions. [2020-10-23 19:00:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:00:52,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-10-23 19:00:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:00:52,680 INFO L225 Difference]: With dead ends: 7793 [2020-10-23 19:00:52,680 INFO L226 Difference]: Without dead ends: 5319 [2020-10-23 19:00:52,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:00:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-10-23 19:00:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-10-23 19:00:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-10-23 19:00:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8597 transitions. [2020-10-23 19:00:52,914 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8597 transitions. Word has length 476 [2020-10-23 19:00:52,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:00:52,915 INFO L481 AbstractCegarLoop]: Abstraction has 5268 states and 8597 transitions. [2020-10-23 19:00:52,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:00:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8597 transitions. [2020-10-23 19:00:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-23 19:00:52,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:52,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:00:52,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:00:52,936 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2071467502, now seen corresponding path program 1 times [2020-10-23 19:00:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:52,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809353464] [2020-10-23 19:00:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:54,231 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:00:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:54,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809353464] [2020-10-23 19:00:54,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:54,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:00:54,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660697543] [2020-10-23 19:00:54,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:00:54,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:00:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:00:54,464 INFO L87 Difference]: Start difference. First operand 5268 states and 8597 transitions. Second operand 4 states. [2020-10-23 19:01:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:13,440 INFO L93 Difference]: Finished difference Result 15705 states and 25622 transitions. [2020-10-23 19:01:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:01:13,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-10-23 19:01:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:13,489 INFO L225 Difference]: With dead ends: 15705 [2020-10-23 19:01:13,489 INFO L226 Difference]: Without dead ends: 10489 [2020-10-23 19:01:13,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10489 states. [2020-10-23 19:01:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10489 to 5315. [2020-10-23 19:01:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-10-23 19:01:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8671 transitions. [2020-10-23 19:01:13,783 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8671 transitions. Word has length 477 [2020-10-23 19:01:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:13,784 INFO L481 AbstractCegarLoop]: Abstraction has 5315 states and 8671 transitions. [2020-10-23 19:01:13,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8671 transitions. [2020-10-23 19:01:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-23 19:01:13,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:13,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:01:13,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:01:13,806 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash -473890106, now seen corresponding path program 1 times [2020-10-23 19:01:13,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:13,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444585655] [2020-10-23 19:01:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:15,283 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:01:15,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:15,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444585655] [2020-10-23 19:01:15,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:15,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:15,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294670017] [2020-10-23 19:01:15,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:15,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:15,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:15,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:15,660 INFO L87 Difference]: Start difference. First operand 5315 states and 8671 transitions. Second operand 4 states. [2020-10-23 19:01:33,119 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-23 19:01:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:36,066 INFO L93 Difference]: Finished difference Result 15285 states and 24842 transitions. [2020-10-23 19:01:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:36,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-10-23 19:01:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:36,112 INFO L225 Difference]: With dead ends: 15285 [2020-10-23 19:01:36,112 INFO L226 Difference]: Without dead ends: 10369 [2020-10-23 19:01:36,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2020-10-23 19:01:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10320. [2020-10-23 19:01:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10320 states. [2020-10-23 19:01:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10320 states to 10320 states and 16753 transitions. [2020-10-23 19:01:36,627 INFO L78 Accepts]: Start accepts. Automaton has 10320 states and 16753 transitions. Word has length 478 [2020-10-23 19:01:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:36,628 INFO L481 AbstractCegarLoop]: Abstraction has 10320 states and 16753 transitions. [2020-10-23 19:01:36,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10320 states and 16753 transitions. [2020-10-23 19:01:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-23 19:01:36,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:36,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:01:36,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:01:36,652 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 912284811, now seen corresponding path program 1 times [2020-10-23 19:01:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651617781] [2020-10-23 19:01:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:37,967 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:01:37,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651617781] [2020-10-23 19:01:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070142062] [2020-10-23 19:01:38,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:38,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:38,234 INFO L87 Difference]: Start difference. First operand 10320 states and 16753 transitions. Second operand 4 states. [2020-10-23 19:01:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:58,548 INFO L93 Difference]: Finished difference Result 30702 states and 49813 transitions. [2020-10-23 19:01:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:01:58,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-10-23 19:01:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:58,594 INFO L225 Difference]: With dead ends: 30702 [2020-10-23 19:01:58,594 INFO L226 Difference]: Without dead ends: 20526 [2020-10-23 19:01:58,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20526 states. [2020-10-23 19:01:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20526 to 10418. [2020-10-23 19:01:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2020-10-23 19:01:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 16904 transitions. [2020-10-23 19:01:59,127 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 16904 transitions. Word has length 478 [2020-10-23 19:01:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:59,128 INFO L481 AbstractCegarLoop]: Abstraction has 10418 states and 16904 transitions. [2020-10-23 19:01:59,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 16904 transitions. [2020-10-23 19:01:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-23 19:01:59,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:59,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:01:59,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:01:59,153 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash -253108801, now seen corresponding path program 1 times [2020-10-23 19:01:59,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:59,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223317533] [2020-10-23 19:01:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:00,539 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:02:00,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223317533] [2020-10-23 19:02:00,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:00,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:00,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553089429] [2020-10-23 19:02:00,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:00,869 INFO L87 Difference]: Start difference. First operand 10418 states and 16904 transitions. Second operand 4 states. [2020-10-23 19:02:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:21,554 INFO L93 Difference]: Finished difference Result 30837 states and 49994 transitions. [2020-10-23 19:02:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:21,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-10-23 19:02:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:21,591 INFO L225 Difference]: With dead ends: 30837 [2020-10-23 19:02:21,591 INFO L226 Difference]: Without dead ends: 20643 [2020-10-23 19:02:21,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2020-10-23 19:02:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 10535. [2020-10-23 19:02:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10535 states. [2020-10-23 19:02:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 17050 transitions. [2020-10-23 19:02:22,253 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 17050 transitions. Word has length 479 [2020-10-23 19:02:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:22,253 INFO L481 AbstractCegarLoop]: Abstraction has 10535 states and 17050 transitions. [2020-10-23 19:02:22,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 17050 transitions. [2020-10-23 19:02:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-23 19:02:22,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:22,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:22,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:02:22,275 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash -992136447, now seen corresponding path program 1 times [2020-10-23 19:02:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:22,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648737832] [2020-10-23 19:02:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:23,724 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:02:23,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:24,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648737832] [2020-10-23 19:02:24,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:24,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861104637] [2020-10-23 19:02:24,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:24,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:24,077 INFO L87 Difference]: Start difference. First operand 10535 states and 17050 transitions. Second operand 4 states. [2020-10-23 19:02:43,044 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-23 19:02:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:46,332 INFO L93 Difference]: Finished difference Result 29921 states and 48295 transitions. [2020-10-23 19:02:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:46,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-10-23 19:02:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:46,363 INFO L225 Difference]: With dead ends: 29921 [2020-10-23 19:02:46,363 INFO L226 Difference]: Without dead ends: 20355 [2020-10-23 19:02:46,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2020-10-23 19:02:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 20308. [2020-10-23 19:02:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20308 states. [2020-10-23 19:02:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 32715 transitions. [2020-10-23 19:02:47,361 INFO L78 Accepts]: Start accepts. Automaton has 20308 states and 32715 transitions. Word has length 480 [2020-10-23 19:02:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:47,362 INFO L481 AbstractCegarLoop]: Abstraction has 20308 states and 32715 transitions. [2020-10-23 19:02:47,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 20308 states and 32715 transitions. [2020-10-23 19:02:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-23 19:02:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:47,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:47,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:02:47,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 61791774, now seen corresponding path program 1 times [2020-10-23 19:02:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:47,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446981668] [2020-10-23 19:02:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:49,485 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:02:49,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:49,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446981668] [2020-10-23 19:02:49,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:49,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:49,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104433577] [2020-10-23 19:02:49,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:49,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:49,803 INFO L87 Difference]: Start difference. First operand 20308 states and 32715 transitions. Second operand 5 states. [2020-10-23 19:03:06,299 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-23 19:03:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:09,707 INFO L93 Difference]: Finished difference Result 59491 states and 95819 transitions. [2020-10-23 19:03:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:09,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 480 [2020-10-23 19:03:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:09,755 INFO L225 Difference]: With dead ends: 59491 [2020-10-23 19:03:09,755 INFO L226 Difference]: Without dead ends: 39401 [2020-10-23 19:03:09,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states. [2020-10-23 19:03:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39401 to 39359. [2020-10-23 19:03:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39359 states. [2020-10-23 19:03:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39359 states to 39359 states and 63097 transitions. [2020-10-23 19:03:11,799 INFO L78 Accepts]: Start accepts. Automaton has 39359 states and 63097 transitions. Word has length 480 [2020-10-23 19:03:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:11,799 INFO L481 AbstractCegarLoop]: Abstraction has 39359 states and 63097 transitions. [2020-10-23 19:03:11,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 39359 states and 63097 transitions. [2020-10-23 19:03:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-23 19:03:11,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:11,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:11,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:03:11,850 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash 608666427, now seen corresponding path program 1 times [2020-10-23 19:03:11,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:11,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820951711] [2020-10-23 19:03:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:13,402 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:03:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:13,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820951711] [2020-10-23 19:03:13,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555429160] [2020-10-23 19:03:13,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:13,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:13,953 INFO L87 Difference]: Start difference. First operand 39359 states and 63097 transitions. Second operand 4 states. [2020-10-23 19:03:35,868 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-23 19:03:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:39,742 INFO L93 Difference]: Finished difference Result 115406 states and 184844 transitions. [2020-10-23 19:03:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:39,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-10-23 19:03:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:39,822 INFO L225 Difference]: With dead ends: 115406 [2020-10-23 19:03:39,823 INFO L226 Difference]: Without dead ends: 77589 [2020-10-23 19:03:39,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2020-10-23 19:03:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77551. [2020-10-23 19:03:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77551 states. [2020-10-23 19:03:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77551 states to 77551 states and 123853 transitions. [2020-10-23 19:03:43,648 INFO L78 Accepts]: Start accepts. Automaton has 77551 states and 123853 transitions. Word has length 482 [2020-10-23 19:03:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:43,648 INFO L481 AbstractCegarLoop]: Abstraction has 77551 states and 123853 transitions. [2020-10-23 19:03:43,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 77551 states and 123853 transitions. [2020-10-23 19:03:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-10-23 19:03:43,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:43,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:43,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:03:43,738 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1044574323, now seen corresponding path program 1 times [2020-10-23 19:03:43,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:43,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276870818] [2020-10-23 19:03:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:46,239 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:03:46,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:46,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276870818] [2020-10-23 19:03:46,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:46,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:46,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887218626] [2020-10-23 19:03:46,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:46,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:46,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:46,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:46,609 INFO L87 Difference]: Start difference. First operand 77551 states and 123853 transitions. Second operand 5 states. [2020-10-23 19:04:09,087 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-23 19:04:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:13,635 INFO L93 Difference]: Finished difference Result 229838 states and 367080 transitions. [2020-10-23 19:04:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:04:13,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-10-23 19:04:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:14,073 INFO L225 Difference]: With dead ends: 229838 [2020-10-23 19:04:14,073 INFO L226 Difference]: Without dead ends: 152624 [2020-10-23 19:04:14,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:04:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152624 states. [2020-10-23 19:04:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152624 to 152593. [2020-10-23 19:04:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152593 states. [2020-10-23 19:04:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152593 states to 152593 states and 242618 transitions. [2020-10-23 19:04:22,453 INFO L78 Accepts]: Start accepts. Automaton has 152593 states and 242618 transitions. Word has length 484 [2020-10-23 19:04:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:22,454 INFO L481 AbstractCegarLoop]: Abstraction has 152593 states and 242618 transitions. [2020-10-23 19:04:22,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:04:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 152593 states and 242618 transitions. [2020-10-23 19:04:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-10-23 19:04:22,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:22,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:04:22,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:04:22,594 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 170544052, now seen corresponding path program 1 times [2020-10-23 19:04:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:22,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225107405] [2020-10-23 19:04:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:24,781 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:04:24,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225107405] [2020-10-23 19:04:25,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:25,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:04:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108815854] [2020-10-23 19:04:25,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:04:25,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:04:25,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:25,198 INFO L87 Difference]: Start difference. First operand 152593 states and 242618 transitions. Second operand 5 states. [2020-10-23 19:04:54,440 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-23 19:05:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:00,734 INFO L93 Difference]: Finished difference Result 453319 states and 720698 transitions. [2020-10-23 19:05:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:05:00,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-10-23 19:05:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:01,426 INFO L225 Difference]: With dead ends: 453319 [2020-10-23 19:05:01,426 INFO L226 Difference]: Without dead ends: 301577 [2020-10-23 19:05:01,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:05:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301577 states. [2020-10-23 19:05:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301577 to 300867. [2020-10-23 19:05:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300867 states. [2020-10-23 19:05:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300867 states to 300867 states and 476252 transitions. [2020-10-23 19:05:19,035 INFO L78 Accepts]: Start accepts. Automaton has 300867 states and 476252 transitions. Word has length 486 [2020-10-23 19:05:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:19,035 INFO L481 AbstractCegarLoop]: Abstraction has 300867 states and 476252 transitions. [2020-10-23 19:05:19,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:05:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 300867 states and 476252 transitions. [2020-10-23 19:05:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-23 19:05:19,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:19,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:19,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:05:19,847 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:19,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1311924685, now seen corresponding path program 1 times [2020-10-23 19:05:19,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:19,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873643084] [2020-10-23 19:05:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:21,617 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:05:21,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873643084] [2020-10-23 19:05:22,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:22,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:22,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665563119] [2020-10-23 19:05:22,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:22,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:22,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:22,092 INFO L87 Difference]: Start difference. First operand 300867 states and 476252 transitions. Second operand 4 states. [2020-10-23 19:06:08,673 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 420 [2020-10-23 19:06:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:18,061 INFO L93 Difference]: Finished difference Result 888823 states and 1405410 transitions. [2020-10-23 19:06:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:06:18,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-10-23 19:06:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:19,254 INFO L225 Difference]: With dead ends: 888823 [2020-10-23 19:06:19,254 INFO L226 Difference]: Without dead ends: 595793 [2020-10-23 19:06:19,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595793 states. [2020-10-23 19:06:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595793 to 595083. [2020-10-23 19:06:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595083 states. [2020-10-23 19:06:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595083 states to 595083 states and 938048 transitions. [2020-10-23 19:06:58,847 INFO L78 Accepts]: Start accepts. Automaton has 595083 states and 938048 transitions. Word has length 488 [2020-10-23 19:06:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:58,848 INFO L481 AbstractCegarLoop]: Abstraction has 595083 states and 938048 transitions. [2020-10-23 19:06:58,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 595083 states and 938048 transitions. [2020-10-23 19:07:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-23 19:07:00,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:00,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:00,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:07:00,132 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2038617648, now seen corresponding path program 1 times [2020-10-23 19:07:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:00,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782340425] [2020-10-23 19:07:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:01,845 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-23 19:07:01,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:02,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782340425] [2020-10-23 19:07:02,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:02,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:02,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124887612] [2020-10-23 19:07:02,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:02,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:02,184 INFO L87 Difference]: Start difference. First operand 595083 states and 938048 transitions. Second operand 4 states.