/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:59:59,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:59:59,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:59:59,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:59:59,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:59:59,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:59:59,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:59:59,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:59:59,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:59:59,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:59:59,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:59:59,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:59:59,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:59:59,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:59:59,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:59:59,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:59:59,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:59:59,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:59:59,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:59:59,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:59:59,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:59:59,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:59:59,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:59:59,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:59:59,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:59:59,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:59:59,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:59:59,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:59:59,162 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 18:59:59,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:59:59,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:59:59,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:59:59,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:59:59,202 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:59:59,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:59:59,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:59:59,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:59:59,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:59:59,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:59:59,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:59:59,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:59:59,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:59:59,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:59:59,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:59:59,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:59:59,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:59:59,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:59:59,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:59:59,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:59:59,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:59:59,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:59:59,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:59:59,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:59:59,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:59:59,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:59:59,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:59:59,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:59:59,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:59:59,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:59:59,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:59:59,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:59:59,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:59:59,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:59:59,635 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:59:59,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-23 18:59:59,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481c366b5/89f6825cc143483e897998fe182d4f36/FLAGc2980fa31 [2020-10-23 19:00:00,747 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:00:00,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-23 19:00:00,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481c366b5/89f6825cc143483e897998fe182d4f36/FLAGc2980fa31 [2020-10-23 19:00:01,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481c366b5/89f6825cc143483e897998fe182d4f36 [2020-10-23 19:00:01,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:00:01,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:00:01,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:01,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:00:01,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:00:01,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d36efc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:01, skipping insertion in model container [2020-10-23 19:00:01,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:00:01" (1/1) ... [2020-10-23 19:00:01,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:00:01,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:00:03,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:03,955 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:00:05,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:05,449 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:00:05,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05 WrapperNode [2020-10-23 19:00:05,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:05,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:00:05,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:00:05,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:00:05,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (1/1) ... [2020-10-23 19:00:05,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:00:05,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:00:05,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:00:05,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:00:05,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (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 19:00:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:00:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:00:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:00:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:00:05,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:00:13,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:00:13,102 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:00:13,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:00:13 BoogieIcfgContainer [2020-10-23 19:00:13,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:00:13,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:00:13,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:00:13,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:00:13,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:00:01" (1/3) ... [2020-10-23 19:00:13,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dd7135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:00:13, skipping insertion in model container [2020-10-23 19:00:13,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:05" (2/3) ... [2020-10-23 19:00:13,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dd7135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:00:13, skipping insertion in model container [2020-10-23 19:00:13,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:00:13" (3/3) ... [2020-10-23 19:00:13,116 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-23 19:00:13,129 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:00:13,135 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:00:13,151 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:00:13,193 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:00:13,193 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:00:13,193 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:00:13,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:00:13,194 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:00:13,194 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:00:13,194 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:00:13,194 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:00:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states. [2020-10-23 19:00:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-23 19:00:13,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:13,294 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] [2020-10-23 19:00:13,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2058974461, now seen corresponding path program 1 times [2020-10-23 19:00:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:13,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564871236] [2020-10-23 19:00:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:16,271 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:00:16,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:16,471 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 19:00:16,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564871236] [2020-10-23 19:00:16,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:16,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:00:16,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796957670] [2020-10-23 19:00:16,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:00:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:16,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:00:16,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:00:16,501 INFO L87 Difference]: Start difference. First operand 2253 states. Second operand 5 states. [2020-10-23 19:00:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:00:33,912 INFO L93 Difference]: Finished difference Result 3960 states and 6891 transitions. [2020-10-23 19:00:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:00:33,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2020-10-23 19:00:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:00:33,960 INFO L225 Difference]: With dead ends: 3960 [2020-10-23 19:00:33,961 INFO L226 Difference]: Without dead ends: 2245 [2020-10-23 19:00:33,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 19:00:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-10-23 19:00:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-10-23 19:00:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-10-23 19:00:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3872 transitions. [2020-10-23 19:00:34,190 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3872 transitions. Word has length 291 [2020-10-23 19:00:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:00:34,194 INFO L481 AbstractCegarLoop]: Abstraction has 2245 states and 3872 transitions. [2020-10-23 19:00:34,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:00:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3872 transitions. [2020-10-23 19:00:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-23 19:00:34,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:34,210 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] [2020-10-23 19:00:34,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:00:34,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash 96496140, now seen corresponding path program 1 times [2020-10-23 19:00:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:34,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624178743] [2020-10-23 19:00:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:35,924 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:00:35,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:36,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624178743] [2020-10-23 19:00:36,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:36,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:00:36,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159960744] [2020-10-23 19:00:36,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:00:36,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:36,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:00:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:00:36,170 INFO L87 Difference]: Start difference. First operand 2245 states and 3872 transitions. Second operand 4 states. [2020-10-23 19:00:37,448 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-23 19:01:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:04,945 INFO L93 Difference]: Finished difference Result 5464 states and 9359 transitions. [2020-10-23 19:01:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:04,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 350 [2020-10-23 19:01:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:04,970 INFO L225 Difference]: With dead ends: 5464 [2020-10-23 19:01:04,970 INFO L226 Difference]: Without dead ends: 3801 [2020-10-23 19:01:04,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 19:01:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-10-23 19:01:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-10-23 19:01:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-10-23 19:01:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6465 transitions. [2020-10-23 19:01:05,149 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6465 transitions. Word has length 350 [2020-10-23 19:01:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:05,153 INFO L481 AbstractCegarLoop]: Abstraction has 3797 states and 6465 transitions. [2020-10-23 19:01:05,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6465 transitions. [2020-10-23 19:01:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-23 19:01:05,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:05,171 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] [2020-10-23 19:01:05,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:01:05,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash -892013158, now seen corresponding path program 1 times [2020-10-23 19:01:05,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:05,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746779988] [2020-10-23 19:01:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:06,654 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:01:06,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:06,868 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 19:01:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746779988] [2020-10-23 19:01:06,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:06,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:06,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699320533] [2020-10-23 19:01:06,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:06,871 INFO L87 Difference]: Start difference. First operand 3797 states and 6465 transitions. Second operand 4 states. [2020-10-23 19:01:08,183 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-23 19:01:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:33,672 INFO L93 Difference]: Finished difference Result 6370 states and 10874 transitions. [2020-10-23 19:01:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:33,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 354 [2020-10-23 19:01:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:33,699 INFO L225 Difference]: With dead ends: 6370 [2020-10-23 19:01:33,699 INFO L226 Difference]: Without dead ends: 4697 [2020-10-23 19:01:33,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4697 states. [2020-10-23 19:01:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4697 to 4693. [2020-10-23 19:01:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2020-10-23 19:01:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 7997 transitions. [2020-10-23 19:01:33,868 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 7997 transitions. Word has length 354 [2020-10-23 19:01:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:33,869 INFO L481 AbstractCegarLoop]: Abstraction has 4693 states and 7997 transitions. [2020-10-23 19:01:33,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 7997 transitions. [2020-10-23 19:01:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-23 19:01:33,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:33,885 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] [2020-10-23 19:01:33,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:01:33,886 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1214527949, now seen corresponding path program 1 times [2020-10-23 19:01:33,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:33,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114167678] [2020-10-23 19:01:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:35,370 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:01:35,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:35,558 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 19:01:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114167678] [2020-10-23 19:01:35,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:35,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:35,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637303185] [2020-10-23 19:01:35,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:35,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:35,561 INFO L87 Difference]: Start difference. First operand 4693 states and 7997 transitions. Second operand 4 states. [2020-10-23 19:01:36,876 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-23 19:02:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:01,758 INFO L93 Difference]: Finished difference Result 12615 states and 21385 transitions. [2020-10-23 19:02:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:01,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 358 [2020-10-23 19:02:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:01,801 INFO L225 Difference]: With dead ends: 12615 [2020-10-23 19:02:01,802 INFO L226 Difference]: Without dead ends: 8527 [2020-10-23 19:02:01,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2020-10-23 19:02:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8523. [2020-10-23 19:02:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8523 states. [2020-10-23 19:02:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 14422 transitions. [2020-10-23 19:02:02,110 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 14422 transitions. Word has length 358 [2020-10-23 19:02:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:02,111 INFO L481 AbstractCegarLoop]: Abstraction has 8523 states and 14422 transitions. [2020-10-23 19:02:02,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 14422 transitions. [2020-10-23 19:02:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-23 19:02:02,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:02,132 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] [2020-10-23 19:02:02,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:02:02,133 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash -730403625, now seen corresponding path program 1 times [2020-10-23 19:02:02,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:02,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426173944] [2020-10-23 19:02:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:03,520 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:02:03,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:03,701 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 19:02:03,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426173944] [2020-10-23 19:02:03,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:03,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:03,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812919207] [2020-10-23 19:02:03,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:03,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:03,704 INFO L87 Difference]: Start difference. First operand 8523 states and 14422 transitions. Second operand 4 states. [2020-10-23 19:02:04,977 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-23 19:02:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:28,942 INFO L93 Difference]: Finished difference Result 15288 states and 25913 transitions. [2020-10-23 19:02:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:28,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 362 [2020-10-23 19:02:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:28,995 INFO L225 Difference]: With dead ends: 15288 [2020-10-23 19:02:28,995 INFO L226 Difference]: Without dead ends: 11190 [2020-10-23 19:02:29,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 19:02:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2020-10-23 19:02:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11186. [2020-10-23 19:02:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11186 states. [2020-10-23 19:02:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 18932 transitions. [2020-10-23 19:02:29,424 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 18932 transitions. Word has length 362 [2020-10-23 19:02:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:29,425 INFO L481 AbstractCegarLoop]: Abstraction has 11186 states and 18932 transitions. [2020-10-23 19:02:29,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 18932 transitions. [2020-10-23 19:02:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-23 19:02:29,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:29,451 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] [2020-10-23 19:02:29,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:02:29,451 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1484769404, now seen corresponding path program 1 times [2020-10-23 19:02:29,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:29,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572484428] [2020-10-23 19:02:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:30,839 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:02:30,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:31,089 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 19:02:31,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572484428] [2020-10-23 19:02:31,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:31,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534194511] [2020-10-23 19:02:31,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:31,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:31,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:31,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:31,095 INFO L87 Difference]: Start difference. First operand 11186 states and 18932 transitions. Second operand 4 states. [2020-10-23 19:02:32,363 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-23 19:02:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:59,298 INFO L93 Difference]: Finished difference Result 31564 states and 53196 transitions. [2020-10-23 19:02:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:59,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 366 [2020-10-23 19:02:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:59,343 INFO L225 Difference]: With dead ends: 31564 [2020-10-23 19:02:59,344 INFO L226 Difference]: Without dead ends: 21006 [2020-10-23 19:02:59,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21006 states. [2020-10-23 19:03:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21006 to 21002. [2020-10-23 19:03:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2020-10-23 19:03:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 35289 transitions. [2020-10-23 19:03:00,078 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 35289 transitions. Word has length 366 [2020-10-23 19:03:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:00,079 INFO L481 AbstractCegarLoop]: Abstraction has 21002 states and 35289 transitions. [2020-10-23 19:03:00,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 35289 transitions. [2020-10-23 19:03:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-23 19:03:00,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:00,122 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] [2020-10-23 19:03:00,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:03:00,123 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1426007070, now seen corresponding path program 1 times [2020-10-23 19:03:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:00,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489959436] [2020-10-23 19:03:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:01,585 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:03:01,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:01,855 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 19:03:01,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489959436] [2020-10-23 19:03:01,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:01,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:01,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014371233] [2020-10-23 19:03:01,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:01,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:01,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:01,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:01,860 INFO L87 Difference]: Start difference. First operand 21002 states and 35289 transitions. Second operand 4 states. [2020-10-23 19:03:03,202 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-23 19:03:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:27,837 INFO L93 Difference]: Finished difference Result 38803 states and 65370 transitions. [2020-10-23 19:03:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:27,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 370 [2020-10-23 19:03:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:27,885 INFO L225 Difference]: With dead ends: 38803 [2020-10-23 19:03:27,886 INFO L226 Difference]: Without dead ends: 28235 [2020-10-23 19:03:27,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 19:03:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28235 states. [2020-10-23 19:03:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28235 to 28231. [2020-10-23 19:03:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28231 states. [2020-10-23 19:03:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28231 states to 28231 states and 47447 transitions. [2020-10-23 19:03:28,785 INFO L78 Accepts]: Start accepts. Automaton has 28231 states and 47447 transitions. Word has length 370 [2020-10-23 19:03:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:28,786 INFO L481 AbstractCegarLoop]: Abstraction has 28231 states and 47447 transitions. [2020-10-23 19:03:28,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 28231 states and 47447 transitions. [2020-10-23 19:03:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-23 19:03:28,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:28,829 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] [2020-10-23 19:03:28,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:03:28,829 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1921358165, now seen corresponding path program 1 times [2020-10-23 19:03:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:28,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437308365] [2020-10-23 19:03:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:30,260 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:03:30,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:30,400 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 19:03:30,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437308365] [2020-10-23 19:03:30,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:30,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:30,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194913060] [2020-10-23 19:03:30,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:30,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:30,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:30,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:30,402 INFO L87 Difference]: Start difference. First operand 28231 states and 47447 transitions. Second operand 4 states. [2020-10-23 19:03:31,822 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-23 19:03:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:58,691 INFO L93 Difference]: Finished difference Result 81223 states and 135941 transitions. [2020-10-23 19:03:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:58,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 374 [2020-10-23 19:03:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:58,763 INFO L225 Difference]: With dead ends: 81223 [2020-10-23 19:03:58,763 INFO L226 Difference]: Without dead ends: 53643 [2020-10-23 19:03:58,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53643 states. [2020-10-23 19:04:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53643 to 53639. [2020-10-23 19:04:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53639 states. [2020-10-23 19:04:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53639 states to 53639 states and 89424 transitions. [2020-10-23 19:04:00,354 INFO L78 Accepts]: Start accepts. Automaton has 53639 states and 89424 transitions. Word has length 374 [2020-10-23 19:04:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:00,355 INFO L481 AbstractCegarLoop]: Abstraction has 53639 states and 89424 transitions. [2020-10-23 19:04:00,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 53639 states and 89424 transitions. [2020-10-23 19:04:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-10-23 19:04:00,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:00,397 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] [2020-10-23 19:04:00,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:04:00,397 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash -353601649, now seen corresponding path program 1 times [2020-10-23 19:04:00,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:00,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813296365] [2020-10-23 19:04:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:02,583 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:04:02,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:02,798 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 19:04:02,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813296365] [2020-10-23 19:04:02,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:02,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409646934] [2020-10-23 19:04:02,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:02,802 INFO L87 Difference]: Start difference. First operand 53639 states and 89424 transitions. Second operand 4 states. [2020-10-23 19:04:04,228 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-23 19:04:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:30,341 INFO L93 Difference]: Finished difference Result 100010 states and 167239 transitions. [2020-10-23 19:04:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:04:30,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 378 [2020-10-23 19:04:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:30,432 INFO L225 Difference]: With dead ends: 100010 [2020-10-23 19:04:30,432 INFO L226 Difference]: Without dead ends: 72420 [2020-10-23 19:04:30,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72420 states. [2020-10-23 19:04:32,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72420 to 72416. [2020-10-23 19:04:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72416 states. [2020-10-23 19:04:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72416 states to 72416 states and 120710 transitions. [2020-10-23 19:04:32,566 INFO L78 Accepts]: Start accepts. Automaton has 72416 states and 120710 transitions. Word has length 378 [2020-10-23 19:04:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:32,566 INFO L481 AbstractCegarLoop]: Abstraction has 72416 states and 120710 transitions. [2020-10-23 19:04:32,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 72416 states and 120710 transitions. [2020-10-23 19:04:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-23 19:04:32,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:32,632 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] [2020-10-23 19:04:32,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:04:32,632 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 159244540, now seen corresponding path program 1 times [2020-10-23 19:04:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:32,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882049558] [2020-10-23 19:04:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:34,250 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:04:34,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:34,540 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 19:04:34,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882049558] [2020-10-23 19:04:34,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:34,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:34,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405317103] [2020-10-23 19:04:34,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:34,542 INFO L87 Difference]: Start difference. First operand 72416 states and 120710 transitions. Second operand 4 states. [2020-10-23 19:04:35,956 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-23 19:05:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:06,144 INFO L93 Difference]: Finished difference Result 209486 states and 347554 transitions. [2020-10-23 19:05:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:05:06,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 382 [2020-10-23 19:05:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:06,313 INFO L225 Difference]: With dead ends: 209486 [2020-10-23 19:05:06,313 INFO L226 Difference]: Without dead ends: 137744 [2020-10-23 19:05:06,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137744 states. [2020-10-23 19:05:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137744 to 137740. [2020-10-23 19:05:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137740 states. [2020-10-23 19:05:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137740 states to 137740 states and 227423 transitions. [2020-10-23 19:05:10,729 INFO L78 Accepts]: Start accepts. Automaton has 137740 states and 227423 transitions. Word has length 382 [2020-10-23 19:05:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:10,730 INFO L481 AbstractCegarLoop]: Abstraction has 137740 states and 227423 transitions. [2020-10-23 19:05:10,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 137740 states and 227423 transitions. [2020-10-23 19:05:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-10-23 19:05:10,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:10,820 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] [2020-10-23 19:05:10,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:05:10,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash 776459818, now seen corresponding path program 1 times [2020-10-23 19:05:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:10,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517267728] [2020-10-23 19:05:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:12,624 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:05:12,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:12,830 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 19:05:12,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517267728] [2020-10-23 19:05:12,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:12,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904209422] [2020-10-23 19:05:12,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:12,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:12,832 INFO L87 Difference]: Start difference. First operand 137740 states and 227423 transitions. Second operand 4 states. [2020-10-23 19:05:14,271 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-23 19:05:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:45,573 INFO L93 Difference]: Finished difference Result 256489 states and 424824 transitions. [2020-10-23 19:05:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:05:45,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 386 [2020-10-23 19:05:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:45,840 INFO L225 Difference]: With dead ends: 256489 [2020-10-23 19:05:45,840 INFO L226 Difference]: Without dead ends: 184737 [2020-10-23 19:05:45,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 19:05:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184737 states. [2020-10-23 19:05:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184737 to 184733. [2020-10-23 19:05:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184733 states. [2020-10-23 19:05:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184733 states to 184733 states and 304689 transitions. [2020-10-23 19:05:52,438 INFO L78 Accepts]: Start accepts. Automaton has 184733 states and 304689 transitions. Word has length 386 [2020-10-23 19:05:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:52,439 INFO L481 AbstractCegarLoop]: Abstraction has 184733 states and 304689 transitions. [2020-10-23 19:05:52,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 184733 states and 304689 transitions. [2020-10-23 19:05:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-23 19:05:52,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:52,613 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] [2020-10-23 19:05:52,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:05:52,614 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1698618589, now seen corresponding path program 1 times [2020-10-23 19:05:52,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:52,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198365580] [2020-10-23 19:05:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:54,573 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:05:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:54,802 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 19:05:54,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198365580] [2020-10-23 19:05:54,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:54,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 19:05:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386320954] [2020-10-23 19:05:54,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 19:05:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 19:05:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-23 19:05:54,805 INFO L87 Difference]: Start difference. First operand 184733 states and 304689 transitions. Second operand 8 states. [2020-10-23 19:05:56,313 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-23 19:07:07,700 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-23 19:07:09,223 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-23 19:07:10,646 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-23 19:07:12,237 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:07:18,448 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 429 [2020-10-23 19:07:19,895 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-23 19:07:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:37,224 INFO L93 Difference]: Finished difference Result 1193777 states and 1977342 transitions. [2020-10-23 19:07:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 19:07:37,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 390 [2020-10-23 19:07:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:39,736 INFO L225 Difference]: With dead ends: 1193777 [2020-10-23 19:07:39,736 INFO L226 Difference]: Without dead ends: 1009721 [2020-10-23 19:07:40,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-10-23 19:07:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009721 states. [2020-10-23 19:08:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009721 to 520028. [2020-10-23 19:08:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520028 states. [2020-10-23 19:08:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520028 states to 520028 states and 856981 transitions. [2020-10-23 19:08:11,644 INFO L78 Accepts]: Start accepts. Automaton has 520028 states and 856981 transitions. Word has length 390 [2020-10-23 19:08:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:11,645 INFO L481 AbstractCegarLoop]: Abstraction has 520028 states and 856981 transitions. [2020-10-23 19:08:11,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 19:08:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 520028 states and 856981 transitions. [2020-10-23 19:08:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-23 19:08:12,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:12,739 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] [2020-10-23 19:08:12,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:08:12,739 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash 116823781, now seen corresponding path program 1 times [2020-10-23 19:08:12,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:12,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716009270] [2020-10-23 19:08:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:14,558 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-23 19:08:14,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:14,754 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 19:08:14,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716009270] [2020-10-23 19:08:14,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:14,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:08:14,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220765715] [2020-10-23 19:08:14,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:08:14,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:08:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:14,756 INFO L87 Difference]: Start difference. First operand 520028 states and 856981 transitions. Second operand 5 states. [2020-10-23 19:08:16,088 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 427