/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:00:28,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:00:28,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:00:28,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:00:28,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:00:28,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:00:28,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:00:28,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:00:28,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:00:28,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:00:28,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:00:28,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:00:28,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:00:28,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:00:28,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:00:28,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:00:28,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:00:28,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:00:28,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:00:28,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:00:28,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:00:28,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:00:28,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:00:28,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:00:28,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:00:28,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:00:28,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:00:28,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:00:28,367 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 23:00:28,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:00:28,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:00:28,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:00:28,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:00:28,399 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:00:28,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:00:28,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:00:28,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:00:28,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:00:28,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:00:28,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:00:28,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:00:28,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:00:28,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:00:28,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:00:28,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:00:28,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:00:28,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:00:28,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:00:28,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:00:28,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:00:28,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:00:28,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:00:28,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:00:28,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:00:28,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:00:28,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:00:28,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:00:28,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:00:28,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:00:28,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:00:28,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:00:28,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:00:28,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:00:28,815 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:00:28,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:00:28,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a15c1705/022c1b610520489b8712990f42e0a423/FLAG148d50dc0 [2020-11-06 23:00:29,789 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:00:29,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:00:29,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a15c1705/022c1b610520489b8712990f42e0a423/FLAG148d50dc0 [2020-11-06 23:00:29,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a15c1705/022c1b610520489b8712990f42e0a423 [2020-11-06 23:00:29,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:00:29,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:00:29,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:29,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:00:29,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:00:29,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:29" (1/1) ... [2020-11-06 23:00:29,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1fcb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:29, skipping insertion in model container [2020-11-06 23:00:29,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:29" (1/1) ... [2020-11-06 23:00:29,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:00:30,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:00:31,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:31,771 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:00:32,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:32,712 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:00:32,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32 WrapperNode [2020-11-06 23:00:32,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:32,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:00:32,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:00:32,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:00:32,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (1/1) ... [2020-11-06 23:00:32,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:00:32,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:00:32,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:00:32,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:00:32,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (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 23:00:33,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:00:33,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:00:33,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:00:33,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:00:33,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:00:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:00:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:00:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:00:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:00:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:00:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:00:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:00:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:00:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:00:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:00:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:00:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:00:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:00:33,078 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:00:33,078 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:00:33,078 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:00:33,078 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:00:33,079 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:00:33,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:00:33,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:00:33,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:00:33,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:00:33,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:00:33,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:00:33,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:00:37,609 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:00:37,610 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:00:37,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:37 BoogieIcfgContainer [2020-11-06 23:00:37,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:00:37,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:00:37,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:00:37,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:00:37,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:00:29" (1/3) ... [2020-11-06 23:00:37,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6766b8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:37, skipping insertion in model container [2020-11-06 23:00:37,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:32" (2/3) ... [2020-11-06 23:00:37,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6766b8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:37, skipping insertion in model container [2020-11-06 23:00:37,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:37" (3/3) ... [2020-11-06 23:00:37,639 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:00:37,673 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:00:37,683 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:00:37,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:00:37,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:00:37,742 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:00:37,742 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:00:37,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:00:37,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:00:37,743 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:00:37,743 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:00:37,743 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:00:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states. [2020-11-06 23:00:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-11-06 23:00:37,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:00:37,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:00:37,875 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:00:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:00:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 972701234, now seen corresponding path program 1 times [2020-11-06 23:00:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:00:37,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375299564] [2020-11-06 23:00:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:00:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:41,499 WARN L194 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:00:41,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:00:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:42,202 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 23:00:42,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375299564] [2020-11-06 23:00:42,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:00:42,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:00:42,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289940393] [2020-11-06 23:00:42,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:00:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:00:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:00:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:00:42,248 INFO L87 Difference]: Start difference. First operand 1397 states. Second operand 5 states. [2020-11-06 23:00:59,544 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:01:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:02,867 INFO L93 Difference]: Finished difference Result 4129 states and 7476 transitions. [2020-11-06 23:01:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 23:01:02,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-11-06 23:01:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:02,902 INFO L225 Difference]: With dead ends: 4129 [2020-11-06 23:01:02,902 INFO L226 Difference]: Without dead ends: 2741 [2020-11-06 23:01:02,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:01:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-11-06 23:01:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-11-06 23:01:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-11-06 23:01:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4399 transitions. [2020-11-06 23:01:03,132 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4399 transitions. Word has length 474 [2020-11-06 23:01:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:03,134 INFO L481 AbstractCegarLoop]: Abstraction has 2688 states and 4399 transitions. [2020-11-06 23:01:03,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:01:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4399 transitions. [2020-11-06 23:01:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-11-06 23:01:03,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:03,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:03,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:01:03,152 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:03,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:03,153 INFO L82 PathProgramCache]: Analyzing trace with hash -421698901, now seen corresponding path program 1 times [2020-11-06 23:01:03,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:03,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8760510] [2020-11-06 23:01:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:04,769 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:01:04,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:05,194 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 23:01:05,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8760510] [2020-11-06 23:01:05,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:05,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:05,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919206816] [2020-11-06 23:01:05,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:05,199 INFO L87 Difference]: Start difference. First operand 2688 states and 4399 transitions. Second operand 4 states. [2020-11-06 23:01:23,901 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 420 [2020-11-06 23:01:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:26,902 INFO L93 Difference]: Finished difference Result 7793 states and 12716 transitions. [2020-11-06 23:01:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:01:26,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-11-06 23:01:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:26,936 INFO L225 Difference]: With dead ends: 7793 [2020-11-06 23:01:26,937 INFO L226 Difference]: Without dead ends: 5319 [2020-11-06 23:01:26,944 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 23:01:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-11-06 23:01:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-11-06 23:01:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-11-06 23:01:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8597 transitions. [2020-11-06 23:01:27,158 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8597 transitions. Word has length 476 [2020-11-06 23:01:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:27,161 INFO L481 AbstractCegarLoop]: Abstraction has 5268 states and 8597 transitions. [2020-11-06 23:01:27,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8597 transitions. [2020-11-06 23:01:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-11-06 23:01:27,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:27,190 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 23:01:27,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:01:27,191 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2071467502, now seen corresponding path program 1 times [2020-11-06 23:01:27,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:27,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830756078] [2020-11-06 23:01:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:28,564 WARN L194 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:01:28,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:28,778 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 23:01:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830756078] [2020-11-06 23:01:28,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562152915] [2020-11-06 23:01:28,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:28,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:28,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:28,781 INFO L87 Difference]: Start difference. First operand 5268 states and 8597 transitions. Second operand 4 states. [2020-11-06 23:01:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:48,884 INFO L93 Difference]: Finished difference Result 15705 states and 25622 transitions. [2020-11-06 23:01:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:01:48,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-11-06 23:01:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:48,939 INFO L225 Difference]: With dead ends: 15705 [2020-11-06 23:01:48,939 INFO L226 Difference]: Without dead ends: 10489 [2020-11-06 23:01:48,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10489 states. [2020-11-06 23:01:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10489 to 5315. [2020-11-06 23:01:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-11-06 23:01:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8671 transitions. [2020-11-06 23:01:49,247 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8671 transitions. Word has length 477 [2020-11-06 23:01:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:49,247 INFO L481 AbstractCegarLoop]: Abstraction has 5315 states and 8671 transitions. [2020-11-06 23:01:49,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8671 transitions. [2020-11-06 23:01:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-11-06 23:01:49,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:49,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:49,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:01:49,264 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash -473890106, now seen corresponding path program 1 times [2020-11-06 23:01:49,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:49,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940776895] [2020-11-06 23:01:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:50,859 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:01:50,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:51,232 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 23:01:51,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940776895] [2020-11-06 23:01:51,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:51,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248250549] [2020-11-06 23:01:51,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:51,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:51,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:51,236 INFO L87 Difference]: Start difference. First operand 5315 states and 8671 transitions. Second operand 4 states. [2020-11-06 23:02:10,165 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 420 [2020-11-06 23:02:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:13,230 INFO L93 Difference]: Finished difference Result 15285 states and 24842 transitions. [2020-11-06 23:02:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:13,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-11-06 23:02:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:13,278 INFO L225 Difference]: With dead ends: 15285 [2020-11-06 23:02:13,279 INFO L226 Difference]: Without dead ends: 10369 [2020-11-06 23:02:13,291 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 23:02:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2020-11-06 23:02:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10320. [2020-11-06 23:02:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10320 states. [2020-11-06 23:02:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10320 states to 10320 states and 16753 transitions. [2020-11-06 23:02:13,925 INFO L78 Accepts]: Start accepts. Automaton has 10320 states and 16753 transitions. Word has length 478 [2020-11-06 23:02:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:13,926 INFO L481 AbstractCegarLoop]: Abstraction has 10320 states and 16753 transitions. [2020-11-06 23:02:13,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 10320 states and 16753 transitions. [2020-11-06 23:02:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-11-06 23:02:13,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:13,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:13,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:02:13,953 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 912284811, now seen corresponding path program 1 times [2020-11-06 23:02:13,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:13,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142916316] [2020-11-06 23:02:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:15,331 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:02:15,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:15,607 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 23:02:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142916316] [2020-11-06 23:02:15,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:15,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284758334] [2020-11-06 23:02:15,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:15,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:15,610 INFO L87 Difference]: Start difference. First operand 10320 states and 16753 transitions. Second operand 4 states. [2020-11-06 23:02:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:36,226 INFO L93 Difference]: Finished difference Result 30702 states and 49813 transitions. [2020-11-06 23:02:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:36,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-11-06 23:02:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:36,282 INFO L225 Difference]: With dead ends: 30702 [2020-11-06 23:02:36,282 INFO L226 Difference]: Without dead ends: 20526 [2020-11-06 23:02:36,305 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 23:02:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20526 states. [2020-11-06 23:02:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20526 to 10418. [2020-11-06 23:02:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2020-11-06 23:02:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 16904 transitions. [2020-11-06 23:02:37,113 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 16904 transitions. Word has length 478 [2020-11-06 23:02:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:37,113 INFO L481 AbstractCegarLoop]: Abstraction has 10418 states and 16904 transitions. [2020-11-06 23:02:37,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 16904 transitions. [2020-11-06 23:02:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-11-06 23:02:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:37,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:37,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:02:37,145 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -253108801, now seen corresponding path program 1 times [2020-11-06 23:02:37,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:37,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341638267] [2020-11-06 23:02:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:38,499 WARN L194 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:02:38,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:38,786 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 23:02:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341638267] [2020-11-06 23:02:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:38,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:38,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464780760] [2020-11-06 23:02:38,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:38,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:38,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:38,791 INFO L87 Difference]: Start difference. First operand 10418 states and 16904 transitions. Second operand 4 states. [2020-11-06 23:02:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:59,701 INFO L93 Difference]: Finished difference Result 30837 states and 49994 transitions. [2020-11-06 23:02:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:59,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-11-06 23:02:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:59,752 INFO L225 Difference]: With dead ends: 30837 [2020-11-06 23:02:59,752 INFO L226 Difference]: Without dead ends: 20643 [2020-11-06 23:02:59,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2020-11-06 23:03:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 10535. [2020-11-06 23:03:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10535 states. [2020-11-06 23:03:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 17050 transitions. [2020-11-06 23:03:00,545 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 17050 transitions. Word has length 479 [2020-11-06 23:03:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:00,545 INFO L481 AbstractCegarLoop]: Abstraction has 10535 states and 17050 transitions. [2020-11-06 23:03:00,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 17050 transitions. [2020-11-06 23:03:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-11-06 23:03:00,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:00,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:00,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:03:00,573 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash -992136447, now seen corresponding path program 1 times [2020-11-06 23:03:00,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:00,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292940877] [2020-11-06 23:03:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:02,025 WARN L194 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:03:02,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:02,633 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 23:03:02,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292940877] [2020-11-06 23:03:02,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:02,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:02,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642044037] [2020-11-06 23:03:02,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:02,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:02,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:02,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:02,638 INFO L87 Difference]: Start difference. First operand 10535 states and 17050 transitions. Second operand 4 states. [2020-11-06 23:03:22,101 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 420 [2020-11-06 23:03:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:25,300 INFO L93 Difference]: Finished difference Result 29921 states and 48295 transitions. [2020-11-06 23:03:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:25,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-11-06 23:03:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:25,340 INFO L225 Difference]: With dead ends: 29921 [2020-11-06 23:03:25,341 INFO L226 Difference]: Without dead ends: 20355 [2020-11-06 23:03:25,359 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 23:03:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2020-11-06 23:03:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 20308. [2020-11-06 23:03:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20308 states. [2020-11-06 23:03:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 32715 transitions. [2020-11-06 23:03:26,690 INFO L78 Accepts]: Start accepts. Automaton has 20308 states and 32715 transitions. Word has length 480 [2020-11-06 23:03:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:26,690 INFO L481 AbstractCegarLoop]: Abstraction has 20308 states and 32715 transitions. [2020-11-06 23:03:26,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 20308 states and 32715 transitions. [2020-11-06 23:03:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-11-06 23:03:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:26,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:26,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:26,738 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 61791774, now seen corresponding path program 1 times [2020-11-06 23:03:26,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:26,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516987629] [2020-11-06 23:03:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:28,768 WARN L194 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:03:28,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:29,238 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 23:03:29,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516987629] [2020-11-06 23:03:29,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:29,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87652997] [2020-11-06 23:03:29,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:29,241 INFO L87 Difference]: Start difference. First operand 20308 states and 32715 transitions. Second operand 5 states. [2020-11-06 23:03:46,075 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:03:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:49,560 INFO L93 Difference]: Finished difference Result 59491 states and 95819 transitions. [2020-11-06 23:03:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:49,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 480 [2020-11-06 23:03:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:49,631 INFO L225 Difference]: With dead ends: 59491 [2020-11-06 23:03:49,631 INFO L226 Difference]: Without dead ends: 39401 [2020-11-06 23:03:49,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states. [2020-11-06 23:03:51,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39401 to 39359. [2020-11-06 23:03:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39359 states. [2020-11-06 23:03:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39359 states to 39359 states and 63097 transitions. [2020-11-06 23:03:51,812 INFO L78 Accepts]: Start accepts. Automaton has 39359 states and 63097 transitions. Word has length 480 [2020-11-06 23:03:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:51,813 INFO L481 AbstractCegarLoop]: Abstraction has 39359 states and 63097 transitions. [2020-11-06 23:03:51,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 39359 states and 63097 transitions. [2020-11-06 23:03:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-11-06 23:03:51,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:51,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:51,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:51,933 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 608666427, now seen corresponding path program 1 times [2020-11-06 23:03:51,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:51,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829312516] [2020-11-06 23:03:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:53,707 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:03:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:54,127 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 23:03:54,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829312516] [2020-11-06 23:03:54,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:54,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432477673] [2020-11-06 23:03:54,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:54,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:54,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:54,130 INFO L87 Difference]: Start difference. First operand 39359 states and 63097 transitions. Second operand 4 states. [2020-11-06 23:04:16,814 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 420 [2020-11-06 23:04:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:20,698 INFO L93 Difference]: Finished difference Result 115406 states and 184844 transitions. [2020-11-06 23:04:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:20,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-11-06 23:04:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:20,795 INFO L225 Difference]: With dead ends: 115406 [2020-11-06 23:04:20,795 INFO L226 Difference]: Without dead ends: 77589 [2020-11-06 23:04:20,829 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 23:04:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2020-11-06 23:04:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77551. [2020-11-06 23:04:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77551 states. [2020-11-06 23:04:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77551 states to 77551 states and 123853 transitions. [2020-11-06 23:04:25,196 INFO L78 Accepts]: Start accepts. Automaton has 77551 states and 123853 transitions. Word has length 482 [2020-11-06 23:04:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:25,197 INFO L481 AbstractCegarLoop]: Abstraction has 77551 states and 123853 transitions. [2020-11-06 23:04:25,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 77551 states and 123853 transitions. [2020-11-06 23:04:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-11-06 23:04:25,311 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:25,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:25,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:25,312 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1044574323, now seen corresponding path program 1 times [2020-11-06 23:04:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:25,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600658258] [2020-11-06 23:04:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:27,525 WARN L194 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:04:27,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:28,109 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 23:04:28,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600658258] [2020-11-06 23:04:28,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:28,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:28,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086026593] [2020-11-06 23:04:28,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:28,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:28,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:28,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:28,112 INFO L87 Difference]: Start difference. First operand 77551 states and 123853 transitions. Second operand 5 states. [2020-11-06 23:04:50,922 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:04:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:55,731 INFO L93 Difference]: Finished difference Result 229838 states and 367080 transitions. [2020-11-06 23:04:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:55,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-11-06 23:04:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:56,081 INFO L225 Difference]: With dead ends: 229838 [2020-11-06 23:04:56,081 INFO L226 Difference]: Without dead ends: 152624 [2020-11-06 23:04:56,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152624 states. [2020-11-06 23:05:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152624 to 152593. [2020-11-06 23:05:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152593 states. [2020-11-06 23:05:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152593 states to 152593 states and 242618 transitions. [2020-11-06 23:05:04,746 INFO L78 Accepts]: Start accepts. Automaton has 152593 states and 242618 transitions. Word has length 484 [2020-11-06 23:05:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:04,747 INFO L481 AbstractCegarLoop]: Abstraction has 152593 states and 242618 transitions. [2020-11-06 23:05:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 152593 states and 242618 transitions. [2020-11-06 23:05:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-11-06 23:05:05,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:05,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:05,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:05:05,143 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 170544052, now seen corresponding path program 1 times [2020-11-06 23:05:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:05,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350734902] [2020-11-06 23:05:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:07,086 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:05:07,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:07,406 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 23:05:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350734902] [2020-11-06 23:05:07,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:07,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:07,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155896449] [2020-11-06 23:05:07,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:07,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:07,409 INFO L87 Difference]: Start difference. First operand 152593 states and 242618 transitions. Second operand 5 states. [2020-11-06 23:05:37,546 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 421 [2020-11-06 23:05:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:44,029 INFO L93 Difference]: Finished difference Result 453319 states and 720698 transitions. [2020-11-06 23:05:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:44,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-11-06 23:05:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:44,737 INFO L225 Difference]: With dead ends: 453319 [2020-11-06 23:05:44,737 INFO L226 Difference]: Without dead ends: 301577 [2020-11-06 23:05:44,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301577 states. [2020-11-06 23:06:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301577 to 300867. [2020-11-06 23:06:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300867 states. [2020-11-06 23:06:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300867 states to 300867 states and 476252 transitions. [2020-11-06 23:06:03,053 INFO L78 Accepts]: Start accepts. Automaton has 300867 states and 476252 transitions. Word has length 486 [2020-11-06 23:06:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:03,053 INFO L481 AbstractCegarLoop]: Abstraction has 300867 states and 476252 transitions. [2020-11-06 23:06:03,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 300867 states and 476252 transitions. [2020-11-06 23:06:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-11-06 23:06:03,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:03,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:03,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:06:03,854 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1311924685, now seen corresponding path program 1 times [2020-11-06 23:06:03,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:03,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771884547] [2020-11-06 23:06:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:05,568 WARN L194 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:06:05,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:06,018 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 23:06:06,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771884547] [2020-11-06 23:06:06,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:06,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:06,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20850676] [2020-11-06 23:06:06,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:06,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:06,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:06,021 INFO L87 Difference]: Start difference. First operand 300867 states and 476252 transitions. Second operand 4 states. [2020-11-06 23:06:53,684 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 420 [2020-11-06 23:07:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:03,447 INFO L93 Difference]: Finished difference Result 888823 states and 1405410 transitions. [2020-11-06 23:07:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:03,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-11-06 23:07:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:04,833 INFO L225 Difference]: With dead ends: 888823 [2020-11-06 23:07:04,834 INFO L226 Difference]: Without dead ends: 595793 [2020-11-06 23:07:05,106 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 23:07:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595793 states. [2020-11-06 23:07:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595793 to 595083. [2020-11-06 23:07:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595083 states. [2020-11-06 23:07:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595083 states to 595083 states and 938048 transitions. [2020-11-06 23:07:45,755 INFO L78 Accepts]: Start accepts. Automaton has 595083 states and 938048 transitions. Word has length 488 [2020-11-06 23:07:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:45,756 INFO L481 AbstractCegarLoop]: Abstraction has 595083 states and 938048 transitions. [2020-11-06 23:07:45,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 595083 states and 938048 transitions. [2020-11-06 23:07:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-11-06 23:07:46,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:46,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:46,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:07:46,996 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2038617648, now seen corresponding path program 1 times [2020-11-06 23:07:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:46,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740294290] [2020-11-06 23:07:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:48,722 WARN L194 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 415 [2020-11-06 23:07:48,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:49,038 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 23:07:49,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740294290] [2020-11-06 23:07:49,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:49,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:49,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784644546] [2020-11-06 23:07:49,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:49,042 INFO L87 Difference]: Start difference. First operand 595083 states and 938048 transitions. Second operand 4 states.