/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:59:56,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:59:56,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:59:56,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:59:56,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:59:56,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:59:56,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:59:56,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:59:56,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:59:56,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:59:56,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:59:56,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:59:56,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:59:56,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:59:56,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:59:56,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:59:56,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:59:56,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:59:56,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:59:56,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:59:56,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:59:56,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:59:56,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:59:56,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:59:56,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:59:56,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:59:56,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:59:56,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:59:56,154 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 [2020-11-06 22:59:56,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:59:56,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:59:56,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:59:56,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:59:56,187 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:59:56,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:59:56,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:59:56,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:59:56,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:59:56,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:59:56,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:59:56,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:59:56,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:59:56,189 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:59:56,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:59:56,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:59:56,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:59:56,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:59:56,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:59:56,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:59:56,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:59:56,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:59:56,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:59:56,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:59:56,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:59:56,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:59:56,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:59:56,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:59:56,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:59:56,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:59:56,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:59:56,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:59:56,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:59:56,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:59:56,749 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:59:56,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-11-06 22:59:56,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6dde2062/a561d15d3dba4e7783b7f7ca41ba6ff2/FLAG70f93dde5 [2020-11-06 22:59:57,799 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:59:57,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-11-06 22:59:57,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6dde2062/a561d15d3dba4e7783b7f7ca41ba6ff2/FLAG70f93dde5 [2020-11-06 22:59:58,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6dde2062/a561d15d3dba4e7783b7f7ca41ba6ff2 [2020-11-06 22:59:58,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:59:58,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:59:58,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:59:58,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:59:58,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:59:58,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:58" (1/1) ... [2020-11-06 22:59:58,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3cd144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:58, skipping insertion in model container [2020-11-06 22:59:58,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:58" (1/1) ... [2020-11-06 22:59:58,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:59:58,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:00:00,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:00,120 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:00:01,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:01,074 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:00:01,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01 WrapperNode [2020-11-06 23:00:01,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:01,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:00:01,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:00:01,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:00:01,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... [2020-11-06 23:00:01,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:00:01,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:00:01,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:00:01,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:00:01,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:00:01,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:00:01,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:00:01,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:00:01,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:00:01,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:00:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:00:01,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:00:01,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:00:01,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:00:01,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:00:01,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:00:01,474 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:00:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:00:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:00:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:00:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:00:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:00:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:00:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:00:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:00:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:00:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:00:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:00:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:00:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:00:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:00:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:00:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:00:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:00:06,801 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:00:06,802 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:00:06,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:06 BoogieIcfgContainer [2020-11-06 23:00:06,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:00:06,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:00:06,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:00:06,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:00:06,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:59:58" (1/3) ... [2020-11-06 23:00:06,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed003ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:06, skipping insertion in model container [2020-11-06 23:00:06,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:01" (2/3) ... [2020-11-06 23:00:06,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed003ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:06, skipping insertion in model container [2020-11-06 23:00:06,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:06" (3/3) ... [2020-11-06 23:00:06,817 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-11-06 23:00:06,835 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:00:06,840 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:00:06,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:00:06,893 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:00:06,894 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:00:06,894 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:00:06,894 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:00:06,894 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:00:06,895 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:00:06,895 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:00:06,895 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:00:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states. [2020-11-06 23:00:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-11-06 23:00:06,991 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:00:06,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:00:06,993 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:00:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:00:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 75514757, now seen corresponding path program 1 times [2020-11-06 23:00:07,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:00:07,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014710606] [2020-11-06 23:00:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:00:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:11,544 WARN L194 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:00:11,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:00:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:00:12,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014710606] [2020-11-06 23:00:12,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:00:12,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:00:12,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287166400] [2020-11-06 23:00:12,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:00:12,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:00:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:00:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:00:12,187 INFO L87 Difference]: Start difference. First operand 1375 states. Second operand 5 states. [2020-11-06 23:00:31,187 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:00:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:00:34,600 INFO L93 Difference]: Finished difference Result 4063 states and 7359 transitions. [2020-11-06 23:00:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 23:00:34,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-11-06 23:00:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:00:34,657 INFO L225 Difference]: With dead ends: 4063 [2020-11-06 23:00:34,657 INFO L226 Difference]: Without dead ends: 2697 [2020-11-06 23:00:34,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:00:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-11-06 23:00:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2020-11-06 23:00:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-11-06 23:00:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4348 transitions. [2020-11-06 23:00:34,953 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4348 transitions. Word has length 465 [2020-11-06 23:00:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:00:34,954 INFO L481 AbstractCegarLoop]: Abstraction has 2647 states and 4348 transitions. [2020-11-06 23:00:34,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:00:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4348 transitions. [2020-11-06 23:00:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-11-06 23:00:34,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:00:34,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:00:34,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:00:34,973 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:00:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:00:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 976385657, now seen corresponding path program 1 times [2020-11-06 23:00:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:00:34,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569270977] [2020-11-06 23:00:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:00:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:36,591 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:00:36,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:00:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:00:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569270977] [2020-11-06 23:00:37,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:00:37,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:00:37,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139777631] [2020-11-06 23:00:37,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:00:37,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:00:37,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:00:37,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:00:37,075 INFO L87 Difference]: Start difference. First operand 2647 states and 4348 transitions. Second operand 4 states. [2020-11-06 23:00:57,391 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:01:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:00,497 INFO L93 Difference]: Finished difference Result 7670 states and 12563 transitions. [2020-11-06 23:01:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:01:00,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-11-06 23:01:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:00,542 INFO L225 Difference]: With dead ends: 7670 [2020-11-06 23:01:00,542 INFO L226 Difference]: Without dead ends: 5237 [2020-11-06 23:01:00,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2020-11-06 23:01:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2020-11-06 23:01:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2020-11-06 23:01:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8498 transitions. [2020-11-06 23:01:00,771 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8498 transitions. Word has length 467 [2020-11-06 23:01:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:00,772 INFO L481 AbstractCegarLoop]: Abstraction has 5189 states and 8498 transitions. [2020-11-06 23:01:00,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8498 transitions. [2020-11-06 23:01:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-11-06 23:01:00,786 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:00,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:00,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:01:00,787 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash 894675351, now seen corresponding path program 1 times [2020-11-06 23:01:00,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:00,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746210090] [2020-11-06 23:01:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:02,266 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:01:02,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:02,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746210090] [2020-11-06 23:01:02,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:02,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314466504] [2020-11-06 23:01:02,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:02,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:02,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:02,482 INFO L87 Difference]: Start difference. First operand 5189 states and 8498 transitions. Second operand 4 states. [2020-11-06 23:01:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:24,714 INFO L93 Difference]: Finished difference Result 15468 states and 25325 transitions. [2020-11-06 23:01:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:01:24,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-11-06 23:01:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:24,764 INFO L225 Difference]: With dead ends: 15468 [2020-11-06 23:01:24,764 INFO L226 Difference]: Without dead ends: 10331 [2020-11-06 23:01:24,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2020-11-06 23:01:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 5236. [2020-11-06 23:01:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-11-06 23:01:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8572 transitions. [2020-11-06 23:01:25,072 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8572 transitions. Word has length 468 [2020-11-06 23:01:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:25,072 INFO L481 AbstractCegarLoop]: Abstraction has 5236 states and 8572 transitions. [2020-11-06 23:01:25,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8572 transitions. [2020-11-06 23:01:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-11-06 23:01:25,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:25,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:25,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:01:25,087 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash 296350750, now seen corresponding path program 1 times [2020-11-06 23:01:25,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:25,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119942029] [2020-11-06 23:01:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:26,681 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:01:26,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:26,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119942029] [2020-11-06 23:01:26,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253283178] [2020-11-06 23:01:27,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:27,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:27,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:27,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:27,009 INFO L87 Difference]: Start difference. First operand 5236 states and 8572 transitions. Second operand 4 states. [2020-11-06 23:01:46,760 WARN L194 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:01:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:49,856 INFO L93 Difference]: Finished difference Result 15048 states and 24545 transitions. [2020-11-06 23:01:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:01:49,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-11-06 23:01:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:49,898 INFO L225 Difference]: With dead ends: 15048 [2020-11-06 23:01:49,899 INFO L226 Difference]: Without dead ends: 10211 [2020-11-06 23:01:49,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2020-11-06 23:01:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2020-11-06 23:01:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2020-11-06 23:01:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16558 transitions. [2020-11-06 23:01:50,430 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16558 transitions. Word has length 469 [2020-11-06 23:01:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:50,431 INFO L481 AbstractCegarLoop]: Abstraction has 10165 states and 16558 transitions. [2020-11-06 23:01:50,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16558 transitions. [2020-11-06 23:01:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-11-06 23:01:50,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:50,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:50,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:01:50,456 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1912956743, now seen corresponding path program 1 times [2020-11-06 23:01:50,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:50,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712724175] [2020-11-06 23:01:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:51,902 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:01:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:52,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712724175] [2020-11-06 23:01:52,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:52,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:52,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288853346] [2020-11-06 23:01:52,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:52,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:52,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:52,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:52,151 INFO L87 Difference]: Start difference. First operand 10165 states and 16558 transitions. Second operand 4 states. [2020-11-06 23:02:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:13,025 INFO L93 Difference]: Finished difference Result 30237 states and 49228 transitions. [2020-11-06 23:02:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:13,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-11-06 23:02:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:13,079 INFO L225 Difference]: With dead ends: 30237 [2020-11-06 23:02:13,079 INFO L226 Difference]: Without dead ends: 20216 [2020-11-06 23:02:13,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20216 states. [2020-11-06 23:02:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20216 to 10263. [2020-11-06 23:02:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2020-11-06 23:02:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16709 transitions. [2020-11-06 23:02:13,735 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16709 transitions. Word has length 469 [2020-11-06 23:02:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:13,735 INFO L481 AbstractCegarLoop]: Abstraction has 10263 states and 16709 transitions. [2020-11-06 23:02:13,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16709 transitions. [2020-11-06 23:02:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-11-06 23:02:13,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:13,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:13,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:02:13,765 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash 608759430, now seen corresponding path program 1 times [2020-11-06 23:02:13,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:13,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176550187] [2020-11-06 23:02:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:15,177 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:02:15,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:15,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176550187] [2020-11-06 23:02:15,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:15,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:15,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316830445] [2020-11-06 23:02:15,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:15,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:15,401 INFO L87 Difference]: Start difference. First operand 10263 states and 16709 transitions. Second operand 4 states. [2020-11-06 23:02:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:35,945 INFO L93 Difference]: Finished difference Result 30372 states and 49409 transitions. [2020-11-06 23:02:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:35,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-11-06 23:02:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:35,988 INFO L225 Difference]: With dead ends: 30372 [2020-11-06 23:02:35,989 INFO L226 Difference]: Without dead ends: 20333 [2020-11-06 23:02:36,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20333 states. [2020-11-06 23:02:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20333 to 10380. [2020-11-06 23:02:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2020-11-06 23:02:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16855 transitions. [2020-11-06 23:02:36,731 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16855 transitions. Word has length 470 [2020-11-06 23:02:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:36,731 INFO L481 AbstractCegarLoop]: Abstraction has 10380 states and 16855 transitions. [2020-11-06 23:02:36,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16855 transitions. [2020-11-06 23:02:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-11-06 23:02:36,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:36,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:36,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:02:36,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:36,754 INFO L82 PathProgramCache]: Analyzing trace with hash -988629597, now seen corresponding path program 1 times [2020-11-06 23:02:36,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:36,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135720016] [2020-11-06 23:02:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:38,228 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:02:38,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135720016] [2020-11-06 23:02:38,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:38,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302495936] [2020-11-06 23:02:38,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:38,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:38,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:38,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:38,715 INFO L87 Difference]: Start difference. First operand 10380 states and 16855 transitions. Second operand 4 states. [2020-11-06 23:02:57,690 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:03:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:00,717 INFO L93 Difference]: Finished difference Result 29456 states and 47710 transitions. [2020-11-06 23:03:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:00,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-11-06 23:03:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:00,753 INFO L225 Difference]: With dead ends: 29456 [2020-11-06 23:03:00,754 INFO L226 Difference]: Without dead ends: 20045 [2020-11-06 23:03:00,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-11-06 23:03:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2020-11-06 23:03:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-11-06 23:03:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32328 transitions. [2020-11-06 23:03:01,795 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32328 transitions. Word has length 471 [2020-11-06 23:03:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:01,795 INFO L481 AbstractCegarLoop]: Abstraction has 20001 states and 32328 transitions. [2020-11-06 23:03:01,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32328 transitions. [2020-11-06 23:03:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-11-06 23:03:01,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:01,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:01,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:01,833 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:01,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1576557082, now seen corresponding path program 1 times [2020-11-06 23:03:01,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:01,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899927577] [2020-11-06 23:03:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:04,018 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:03:04,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:04,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899927577] [2020-11-06 23:03:04,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:04,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:04,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86799710] [2020-11-06 23:03:04,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:04,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:04,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:04,543 INFO L87 Difference]: Start difference. First operand 20001 states and 32328 transitions. Second operand 5 states. [2020-11-06 23:03:20,729 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:03:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:23,993 INFO L93 Difference]: Finished difference Result 58570 states and 94658 transitions. [2020-11-06 23:03:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:23,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 471 [2020-11-06 23:03:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:24,044 INFO L225 Difference]: With dead ends: 58570 [2020-11-06 23:03:24,044 INFO L226 Difference]: Without dead ends: 38787 [2020-11-06 23:03:24,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38787 states. [2020-11-06 23:03:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38787 to 38747. [2020-11-06 23:03:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38747 states. [2020-11-06 23:03:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38747 states to 38747 states and 62325 transitions. [2020-11-06 23:03:26,101 INFO L78 Accepts]: Start accepts. Automaton has 38747 states and 62325 transitions. Word has length 471 [2020-11-06 23:03:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:26,102 INFO L481 AbstractCegarLoop]: Abstraction has 38747 states and 62325 transitions. [2020-11-06 23:03:26,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 38747 states and 62325 transitions. [2020-11-06 23:03:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-11-06 23:03:26,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:26,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:26,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:26,142 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:26,142 INFO L82 PathProgramCache]: Analyzing trace with hash -455553604, now seen corresponding path program 1 times [2020-11-06 23:03:26,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:26,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617576796] [2020-11-06 23:03:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:27,620 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:03:27,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:28,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617576796] [2020-11-06 23:03:28,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:28,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:28,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546117980] [2020-11-06 23:03:28,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:28,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:28,058 INFO L87 Difference]: Start difference. First operand 38747 states and 62325 transitions. Second operand 4 states. [2020-11-06 23:03:49,764 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:03:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:53,603 INFO L93 Difference]: Finished difference Result 113570 states and 182528 transitions. [2020-11-06 23:03:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:53,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-11-06 23:03:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:53,690 INFO L225 Difference]: With dead ends: 113570 [2020-11-06 23:03:53,691 INFO L226 Difference]: Without dead ends: 76365 [2020-11-06 23:03:53,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76365 states. [2020-11-06 23:03:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76365 to 76329. [2020-11-06 23:03:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76329 states. [2020-11-06 23:03:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76329 states to 76329 states and 122311 transitions. [2020-11-06 23:03:57,775 INFO L78 Accepts]: Start accepts. Automaton has 76329 states and 122311 transitions. Word has length 473 [2020-11-06 23:03:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:57,776 INFO L481 AbstractCegarLoop]: Abstraction has 76329 states and 122311 transitions. [2020-11-06 23:03:57,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 76329 states and 122311 transitions. [2020-11-06 23:03:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-11-06 23:03:57,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:57,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:57,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:03:57,881 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1091990497, now seen corresponding path program 1 times [2020-11-06 23:03:57,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:57,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456107607] [2020-11-06 23:03:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:59,727 WARN L194 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:03:59,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456107607] [2020-11-06 23:04:00,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:00,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47521594] [2020-11-06 23:04:00,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:00,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:00,082 INFO L87 Difference]: Start difference. First operand 76329 states and 122311 transitions. Second operand 4 states. [2020-11-06 23:04:25,347 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:04:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:29,638 INFO L93 Difference]: Finished difference Result 222441 states and 355676 transitions. [2020-11-06 23:04:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:29,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-11-06 23:04:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:29,847 INFO L225 Difference]: With dead ends: 222441 [2020-11-06 23:04:29,847 INFO L226 Difference]: Without dead ends: 149820 [2020-11-06 23:04:29,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149820 states. [2020-11-06 23:04:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149820 to 149786. [2020-11-06 23:04:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149786 states. [2020-11-06 23:04:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149786 states to 149786 states and 238899 transitions. [2020-11-06 23:04:37,986 INFO L78 Accepts]: Start accepts. Automaton has 149786 states and 238899 transitions. Word has length 475 [2020-11-06 23:04:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:37,987 INFO L481 AbstractCegarLoop]: Abstraction has 149786 states and 238899 transitions. [2020-11-06 23:04:37,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 149786 states and 238899 transitions. [2020-11-06 23:04:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-11-06 23:04:38,395 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:38,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:38,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:38,395 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash 805345508, now seen corresponding path program 1 times [2020-11-06 23:04:38,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:38,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766267575] [2020-11-06 23:04:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:40,843 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:04:40,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:41,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766267575] [2020-11-06 23:04:41,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:41,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688217329] [2020-11-06 23:04:41,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:41,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:41,167 INFO L87 Difference]: Start difference. First operand 149786 states and 238899 transitions. Second operand 5 states. [2020-11-06 23:05:09,633 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:05:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:15,548 INFO L93 Difference]: Finished difference Result 444825 states and 709447 transitions. [2020-11-06 23:05:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:15,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 475 [2020-11-06 23:05:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:16,228 INFO L225 Difference]: With dead ends: 444825 [2020-11-06 23:05:16,228 INFO L226 Difference]: Without dead ends: 295427 [2020-11-06 23:05:16,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295427 states. [2020-11-06 23:05:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295427 to 295397. [2020-11-06 23:05:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295397 states. [2020-11-06 23:05:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295397 states to 295397 states and 468999 transitions. [2020-11-06 23:05:33,504 INFO L78 Accepts]: Start accepts. Automaton has 295397 states and 468999 transitions. Word has length 475 [2020-11-06 23:05:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:33,505 INFO L481 AbstractCegarLoop]: Abstraction has 295397 states and 468999 transitions. [2020-11-06 23:05:33,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 295397 states and 468999 transitions. [2020-11-06 23:05:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-11-06 23:05:34,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:34,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:34,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:34,311 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1254438039, now seen corresponding path program 1 times [2020-11-06 23:05:34,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:34,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205866794] [2020-11-06 23:05:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:35,966 WARN L194 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:05:35,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:36,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205866794] [2020-11-06 23:05:36,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:36,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763493571] [2020-11-06 23:05:36,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:36,298 INFO L87 Difference]: Start difference. First operand 295397 states and 468999 transitions. Second operand 4 states. [2020-11-06 23:06:21,748 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:06:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:30,613 INFO L93 Difference]: Finished difference Result 876117 states and 1390324 transitions. [2020-11-06 23:06:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:06:30,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-11-06 23:06:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:32,023 INFO L225 Difference]: With dead ends: 876117 [2020-11-06 23:06:32,023 INFO L226 Difference]: Without dead ends: 584358 [2020-11-06 23:06:32,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584358 states. [2020-11-06 23:07:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584358 to 584334. [2020-11-06 23:07:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584334 states. [2020-11-06 23:07:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584334 states to 584334 states and 923857 transitions. [2020-11-06 23:07:10,462 INFO L78 Accepts]: Start accepts. Automaton has 584334 states and 923857 transitions. Word has length 477 [2020-11-06 23:07:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:10,462 INFO L481 AbstractCegarLoop]: Abstraction has 584334 states and 923857 transitions. [2020-11-06 23:07:10,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 584334 states and 923857 transitions. [2020-11-06 23:07:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-11-06 23:07:11,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:11,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:11,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:07:11,671 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1755294420, now seen corresponding path program 1 times [2020-11-06 23:07:11,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:11,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445339717] [2020-11-06 23:07:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:13,698 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:07:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:14,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445339717] [2020-11-06 23:07:14,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:14,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:07:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581947443] [2020-11-06 23:07:14,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:07:14,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:07:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:14,050 INFO L87 Difference]: Start difference. First operand 584334 states and 923857 transitions. Second operand 5 states.