/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_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:06:33,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:06:33,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:06:33,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:06:33,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:06:33,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:06:33,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:06:33,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:06:33,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:06:33,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:06:33,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:06:33,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:06:33,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:06:33,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:06:33,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:06:33,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:06:33,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:06:33,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:06:34,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:06:34,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:06:34,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:06:34,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:06:34,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:06:34,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:06:34,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:06:34,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:06:34,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:06:34,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:06:34,061 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 23:06:34,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:06:34,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:06:34,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:06:34,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:06:34,119 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:06:34,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:06:34,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:06:34,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:06:34,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:06:34,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:06:34,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:06:34,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:06:34,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:06:34,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:06:34,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:06:34,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:06:34,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:06:34,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:06:34,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:06:34,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:06:34,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:06:34,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:06:34,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:06:34,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:06:34,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:06:34,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:06:34,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:06:34,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:06:34,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:06:34,126 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:06:34,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:06:34,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:06:34,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:06:34,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:06:34,549 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:06:34,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-11-06 23:06:34,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9e74005/1405d6c68c554177b1123d5f86f46b77/FLAGe3d591efb [2020-11-06 23:06:35,630 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:06:35,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-11-06 23:06:35,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9e74005/1405d6c68c554177b1123d5f86f46b77/FLAGe3d591efb [2020-11-06 23:06:36,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9e74005/1405d6c68c554177b1123d5f86f46b77 [2020-11-06 23:06:36,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:06:36,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:06:36,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:06:36,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:06:36,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:06:36,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:36" (1/1) ... [2020-11-06 23:06:36,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7909be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:36, skipping insertion in model container [2020-11-06 23:06:36,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:36" (1/1) ... [2020-11-06 23:06:36,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:06:36,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:06:38,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:06:38,949 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:06:40,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:06:40,548 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:06:40,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40 WrapperNode [2020-11-06 23:06:40,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:06:40,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:06:40,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:06:40,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:06:40,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (1/1) ... [2020-11-06 23:06:40,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:06:40,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:06:40,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:06:40,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:06:40,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (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 23:06:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:06:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:06:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:06:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:06:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:06:40,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:06:40,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:06:40,990 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:06:40,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:06:40,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:06:40,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:06:40,991 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:06:40,991 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:06:40,991 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:06:40,991 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:06:40,991 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:06:40,991 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:06:40,992 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:06:40,992 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:06:40,992 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:06:40,992 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:06:40,992 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:06:40,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:06:40,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:06:40,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:06:40,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:06:40,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:06:40,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:06:40,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:06:48,051 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:06:48,052 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:06:48,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:48 BoogieIcfgContainer [2020-11-06 23:06:48,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:06:48,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:06:48,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:06:48,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:06:48,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:06:36" (1/3) ... [2020-11-06 23:06:48,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7689b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:48, skipping insertion in model container [2020-11-06 23:06:48,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:40" (2/3) ... [2020-11-06 23:06:48,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7689b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:48, skipping insertion in model container [2020-11-06 23:06:48,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:48" (3/3) ... [2020-11-06 23:06:48,066 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-11-06 23:06:48,082 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:06:48,087 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:06:48,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:06:48,139 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:06:48,139 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:06:48,139 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:06:48,139 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:06:48,140 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:06:48,140 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:06:48,140 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:06:48,140 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:06:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states. [2020-11-06 23:06:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-06 23:06:48,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:48,250 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] [2020-11-06 23:06:48,251 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash 459972113, now seen corresponding path program 1 times [2020-11-06 23:06:48,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:48,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776383416] [2020-11-06 23:06:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:50,617 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:06:50,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:50,884 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 23:06:50,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776383416] [2020-11-06 23:06:50,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:50,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:06:50,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861643040] [2020-11-06 23:06:50,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:06:50,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:06:50,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:50,914 INFO L87 Difference]: Start difference. First operand 2519 states. Second operand 5 states. [2020-11-06 23:07:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:13,369 INFO L93 Difference]: Finished difference Result 4487 states and 7783 transitions. [2020-11-06 23:07:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:07:13,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-11-06 23:07:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:13,422 INFO L225 Difference]: With dead ends: 4487 [2020-11-06 23:07:13,422 INFO L226 Difference]: Without dead ends: 2511 [2020-11-06 23:07:13,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 23:07:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-11-06 23:07:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-11-06 23:07:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-11-06 23:07:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4318 transitions. [2020-11-06 23:07:13,674 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4318 transitions. Word has length 323 [2020-11-06 23:07:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:13,677 INFO L481 AbstractCegarLoop]: Abstraction has 2511 states and 4318 transitions. [2020-11-06 23:07:13,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:07:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4318 transitions. [2020-11-06 23:07:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-11-06 23:07:13,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:13,696 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] [2020-11-06 23:07:13,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:07:13,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1854167594, now seen corresponding path program 1 times [2020-11-06 23:07:13,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:13,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864871705] [2020-11-06 23:07:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:15,597 WARN L194 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:07:15,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:15,779 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 23:07:15,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864871705] [2020-11-06 23:07:15,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:15,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:15,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508021596] [2020-11-06 23:07:15,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:15,784 INFO L87 Difference]: Start difference. First operand 2511 states and 4318 transitions. Second operand 4 states. [2020-11-06 23:07:17,279 WARN L194 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:07:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:50,433 INFO L93 Difference]: Finished difference Result 6234 states and 10661 transitions. [2020-11-06 23:07:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:50,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 387 [2020-11-06 23:07:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:50,460 INFO L225 Difference]: With dead ends: 6234 [2020-11-06 23:07:50,460 INFO L226 Difference]: Without dead ends: 4315 [2020-11-06 23:07:50,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-11-06 23:07:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4311. [2020-11-06 23:07:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4311 states. [2020-11-06 23:07:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 7335 transitions. [2020-11-06 23:07:50,620 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 7335 transitions. Word has length 387 [2020-11-06 23:07:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:50,621 INFO L481 AbstractCegarLoop]: Abstraction has 4311 states and 7335 transitions. [2020-11-06 23:07:50,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 7335 transitions. [2020-11-06 23:07:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-11-06 23:07:50,638 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:50,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:50,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:07:50,639 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 763929495, now seen corresponding path program 1 times [2020-11-06 23:07:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:50,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605480845] [2020-11-06 23:07:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:52,295 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:07:52,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:52,487 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 23:07:52,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605480845] [2020-11-06 23:07:52,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:52,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:52,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749204878] [2020-11-06 23:07:52,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:52,491 INFO L87 Difference]: Start difference. First operand 4311 states and 7335 transitions. Second operand 4 states. [2020-11-06 23:07:53,986 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 443 [2020-11-06 23:08:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:26,104 INFO L93 Difference]: Finished difference Result 7280 states and 12408 transitions. [2020-11-06 23:08:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:26,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 392 [2020-11-06 23:08:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:26,134 INFO L225 Difference]: With dead ends: 7280 [2020-11-06 23:08:26,134 INFO L226 Difference]: Without dead ends: 5350 [2020-11-06 23:08:26,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:26,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2020-11-06 23:08:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 5346. [2020-11-06 23:08:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5346 states. [2020-11-06 23:08:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5346 states to 5346 states and 9098 transitions. [2020-11-06 23:08:26,324 INFO L78 Accepts]: Start accepts. Automaton has 5346 states and 9098 transitions. Word has length 392 [2020-11-06 23:08:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:26,325 INFO L481 AbstractCegarLoop]: Abstraction has 5346 states and 9098 transitions. [2020-11-06 23:08:26,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5346 states and 9098 transitions. [2020-11-06 23:08:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-11-06 23:08:26,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:26,345 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] [2020-11-06 23:08:26,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:08:26,345 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1214711450, now seen corresponding path program 1 times [2020-11-06 23:08:26,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:26,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776983032] [2020-11-06 23:08:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:28,000 WARN L194 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:08:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:28,182 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 23:08:28,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776983032] [2020-11-06 23:08:28,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:28,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:28,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795026350] [2020-11-06 23:08:28,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:28,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:28,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:28,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:28,185 INFO L87 Difference]: Start difference. First operand 5346 states and 9098 transitions. Second operand 4 states. [2020-11-06 23:08:29,658 WARN L194 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:09:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:02,467 INFO L93 Difference]: Finished difference Result 14521 states and 24619 transitions. [2020-11-06 23:09:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:09:02,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-11-06 23:09:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:02,511 INFO L225 Difference]: With dead ends: 14521 [2020-11-06 23:09:02,511 INFO L226 Difference]: Without dead ends: 9795 [2020-11-06 23:09:02,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2020-11-06 23:09:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 9791. [2020-11-06 23:09:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9791 states. [2020-11-06 23:09:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 16578 transitions. [2020-11-06 23:09:02,847 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 16578 transitions. Word has length 396 [2020-11-06 23:09:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:02,848 INFO L481 AbstractCegarLoop]: Abstraction has 9791 states and 16578 transitions. [2020-11-06 23:09:02,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:09:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 16578 transitions. [2020-11-06 23:09:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-11-06 23:09:02,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:02,876 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] [2020-11-06 23:09:02,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:09:02,877 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2097903769, now seen corresponding path program 1 times [2020-11-06 23:09:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136574848] [2020-11-06 23:09:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:04,583 WARN L194 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:09:04,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:04,785 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 23:09:04,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136574848] [2020-11-06 23:09:04,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:04,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:09:04,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150357928] [2020-11-06 23:09:04,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:09:04,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:09:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:09:04,788 INFO L87 Difference]: Start difference. First operand 9791 states and 16578 transitions. Second operand 4 states. [2020-11-06 23:09:06,330 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 443 [2020-11-06 23:09:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:38,919 INFO L93 Difference]: Finished difference Result 17611 states and 29840 transitions. [2020-11-06 23:09:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:09:38,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 401 [2020-11-06 23:09:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:38,967 INFO L225 Difference]: With dead ends: 17611 [2020-11-06 23:09:38,967 INFO L226 Difference]: Without dead ends: 12874 [2020-11-06 23:09:38,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12874 states. [2020-11-06 23:09:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12874 to 12870. [2020-11-06 23:09:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12870 states. [2020-11-06 23:09:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12870 states to 12870 states and 21780 transitions. [2020-11-06 23:09:39,377 INFO L78 Accepts]: Start accepts. Automaton has 12870 states and 21780 transitions. Word has length 401 [2020-11-06 23:09:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:39,378 INFO L481 AbstractCegarLoop]: Abstraction has 12870 states and 21780 transitions. [2020-11-06 23:09:39,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:09:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 12870 states and 21780 transitions. [2020-11-06 23:09:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-11-06 23:09:39,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:39,413 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] [2020-11-06 23:09:39,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:09:39,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1153187966, now seen corresponding path program 1 times [2020-11-06 23:09:39,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:39,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77616342] [2020-11-06 23:09:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:41,160 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:09:41,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:41,364 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 23:09:41,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77616342] [2020-11-06 23:09:41,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:41,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:09:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209447091] [2020-11-06 23:09:41,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:09:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:09:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:09:41,367 INFO L87 Difference]: Start difference. First operand 12870 states and 21780 transitions. Second operand 4 states. [2020-11-06 23:09:42,874 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:10:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:15,433 INFO L93 Difference]: Finished difference Result 36509 states and 61609 transitions. [2020-11-06 23:10:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:10:15,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 405 [2020-11-06 23:10:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:15,486 INFO L225 Difference]: With dead ends: 36509 [2020-11-06 23:10:15,486 INFO L226 Difference]: Without dead ends: 24287 [2020-11-06 23:10:15,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:10:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24287 states. [2020-11-06 23:10:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24287 to 24283. [2020-11-06 23:10:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24283 states. [2020-11-06 23:10:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24283 states to 24283 states and 40886 transitions. [2020-11-06 23:10:16,192 INFO L78 Accepts]: Start accepts. Automaton has 24283 states and 40886 transitions. Word has length 405 [2020-11-06 23:10:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:16,193 INFO L481 AbstractCegarLoop]: Abstraction has 24283 states and 40886 transitions. [2020-11-06 23:10:16,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:10:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24283 states and 40886 transitions. [2020-11-06 23:10:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-11-06 23:10:16,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:16,251 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] [2020-11-06 23:10:16,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:10:16,251 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1343322057, now seen corresponding path program 1 times [2020-11-06 23:10:16,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:16,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729037310] [2020-11-06 23:10:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:17,985 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:10:17,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:18,185 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 23:10:18,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729037310] [2020-11-06 23:10:18,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:18,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:10:18,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759397815] [2020-11-06 23:10:18,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:10:18,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:18,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:10:18,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:10:18,188 INFO L87 Difference]: Start difference. First operand 24283 states and 40886 transitions. Second operand 4 states. [2020-11-06 23:10:19,679 WARN L194 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 443 [2020-11-06 23:10:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:52,038 INFO L93 Difference]: Finished difference Result 44887 states and 75678 transitions. [2020-11-06 23:10:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:10:52,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2020-11-06 23:10:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:52,114 INFO L225 Difference]: With dead ends: 44887 [2020-11-06 23:10:52,114 INFO L226 Difference]: Without dead ends: 32654 [2020-11-06 23:10:52,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:10:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32654 states. [2020-11-06 23:10:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32654 to 32650. [2020-11-06 23:10:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32650 states. [2020-11-06 23:10:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32650 states to 32650 states and 54938 transitions. [2020-11-06 23:10:53,053 INFO L78 Accepts]: Start accepts. Automaton has 32650 states and 54938 transitions. Word has length 410 [2020-11-06 23:10:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:53,053 INFO L481 AbstractCegarLoop]: Abstraction has 32650 states and 54938 transitions. [2020-11-06 23:10:53,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:10:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32650 states and 54938 transitions. [2020-11-06 23:10:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-11-06 23:10:53,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:53,104 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] [2020-11-06 23:10:53,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:10:53,105 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 972981610, now seen corresponding path program 1 times [2020-11-06 23:10:53,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:53,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889327556] [2020-11-06 23:10:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:54,854 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:10:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:55,067 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 23:10:55,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889327556] [2020-11-06 23:10:55,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:55,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:10:55,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884166026] [2020-11-06 23:10:55,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:10:55,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:10:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:10:55,082 INFO L87 Difference]: Start difference. First operand 32650 states and 54938 transitions. Second operand 4 states. [2020-11-06 23:10:56,636 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:11:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:11:31,173 INFO L93 Difference]: Finished difference Result 94233 states and 158135 transitions. [2020-11-06 23:11:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:11:31,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2020-11-06 23:11:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:11:31,313 INFO L225 Difference]: With dead ends: 94233 [2020-11-06 23:11:31,313 INFO L226 Difference]: Without dead ends: 62259 [2020-11-06 23:11:31,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:11:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62259 states. [2020-11-06 23:11:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62259 to 62255. [2020-11-06 23:11:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62255 states. [2020-11-06 23:11:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62255 states to 62255 states and 104168 transitions. [2020-11-06 23:11:33,216 INFO L78 Accepts]: Start accepts. Automaton has 62255 states and 104168 transitions. Word has length 414 [2020-11-06 23:11:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:11:33,216 INFO L481 AbstractCegarLoop]: Abstraction has 62255 states and 104168 transitions. [2020-11-06 23:11:33,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:11:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 62255 states and 104168 transitions. [2020-11-06 23:11:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-11-06 23:11:33,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:11:33,526 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] [2020-11-06 23:11:33,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:11:33,526 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:11:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:11:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -743767657, now seen corresponding path program 1 times [2020-11-06 23:11:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:11:33,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128655904] [2020-11-06 23:11:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:11:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:11:35,349 WARN L194 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:11:35,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:11:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:11:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:11:35,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128655904] [2020-11-06 23:11:35,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:11:35,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:11:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746014400] [2020-11-06 23:11:35,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:11:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:11:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:11:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:11:35,565 INFO L87 Difference]: Start difference. First operand 62255 states and 104168 transitions. Second operand 4 states. [2020-11-06 23:11:37,051 WARN L194 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 443 [2020-11-06 23:12:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:12:10,092 INFO L93 Difference]: Finished difference Result 116011 states and 194412 transitions. [2020-11-06 23:12:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:12:10,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 419 [2020-11-06 23:12:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:12:10,221 INFO L225 Difference]: With dead ends: 116011 [2020-11-06 23:12:10,221 INFO L226 Difference]: Without dead ends: 84026 [2020-11-06 23:12:10,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:12:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84026 states. [2020-11-06 23:12:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84026 to 84022. [2020-11-06 23:12:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84022 states. [2020-11-06 23:12:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84022 states to 84022 states and 140432 transitions. [2020-11-06 23:12:12,959 INFO L78 Accepts]: Start accepts. Automaton has 84022 states and 140432 transitions. Word has length 419 [2020-11-06 23:12:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:12:12,960 INFO L481 AbstractCegarLoop]: Abstraction has 84022 states and 140432 transitions. [2020-11-06 23:12:12,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:12:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 84022 states and 140432 transitions. [2020-11-06 23:12:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-11-06 23:12:13,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:12:13,064 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] [2020-11-06 23:12:13,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:12:13,064 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:12:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:12:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1845205966, now seen corresponding path program 1 times [2020-11-06 23:12:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:12:13,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291301430] [2020-11-06 23:12:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:12:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:14,887 WARN L194 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:12:14,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:12:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:15,093 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 23:12:15,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291301430] [2020-11-06 23:12:15,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:12:15,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:12:15,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709430242] [2020-11-06 23:12:15,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:12:15,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:12:15,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:12:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:12:15,096 INFO L87 Difference]: Start difference. First operand 84022 states and 140432 transitions. Second operand 4 states. [2020-11-06 23:12:16,635 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:12:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:12:52,614 INFO L93 Difference]: Finished difference Result 243661 states and 406037 transitions. [2020-11-06 23:12:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:12:52,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-11-06 23:12:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:12:52,945 INFO L225 Difference]: With dead ends: 243661 [2020-11-06 23:12:52,945 INFO L226 Difference]: Without dead ends: 160343 [2020-11-06 23:12:53,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:12:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160343 states. [2020-11-06 23:12:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160343 to 160339. [2020-11-06 23:12:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160339 states. [2020-11-06 23:12:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160339 states to 160339 states and 266234 transitions. [2020-11-06 23:12:58,702 INFO L78 Accepts]: Start accepts. Automaton has 160339 states and 266234 transitions. Word has length 423 [2020-11-06 23:12:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:12:58,705 INFO L481 AbstractCegarLoop]: Abstraction has 160339 states and 266234 transitions. [2020-11-06 23:12:58,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:12:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 160339 states and 266234 transitions. [2020-11-06 23:12:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-11-06 23:12:59,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:12:59,045 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] [2020-11-06 23:12:59,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:12:59,046 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:12:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:12:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1447502897, now seen corresponding path program 1 times [2020-11-06 23:12:59,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:12:59,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848000786] [2020-11-06 23:12:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:12:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:13:00,837 WARN L194 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:13:00,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:13:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:13:01,040 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 23:13:01,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848000786] [2020-11-06 23:13:01,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:13:01,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:13:01,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354200294] [2020-11-06 23:13:01,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:13:01,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:13:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:13:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:13:01,043 INFO L87 Difference]: Start difference. First operand 160339 states and 266234 transitions. Second operand 4 states. [2020-11-06 23:13:02,571 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 443 [2020-11-06 23:13:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:13:38,183 INFO L93 Difference]: Finished difference Result 298271 states and 495974 transitions. [2020-11-06 23:13:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:13:38,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 428 [2020-11-06 23:13:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:13:38,471 INFO L225 Difference]: With dead ends: 298271 [2020-11-06 23:13:38,471 INFO L226 Difference]: Without dead ends: 214942 [2020-11-06 23:13:38,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:13:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214942 states. [2020-11-06 23:13:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214942 to 214938. [2020-11-06 23:13:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214938 states. [2020-11-06 23:13:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214938 states to 214938 states and 356166 transitions. [2020-11-06 23:13:45,071 INFO L78 Accepts]: Start accepts. Automaton has 214938 states and 356166 transitions. Word has length 428 [2020-11-06 23:13:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:13:45,072 INFO L481 AbstractCegarLoop]: Abstraction has 214938 states and 356166 transitions. [2020-11-06 23:13:45,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:13:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 214938 states and 356166 transitions. [2020-11-06 23:13:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-11-06 23:13:45,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:13:45,581 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] [2020-11-06 23:13:45,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:13:45,581 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:13:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:13:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1789050142, now seen corresponding path program 1 times [2020-11-06 23:13:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:13:45,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051186095] [2020-11-06 23:13:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:13:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:13:47,292 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:13:47,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:13:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:13:47,508 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 23:13:47,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051186095] [2020-11-06 23:13:47,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:13:47,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 23:13:47,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618985025] [2020-11-06 23:13:47,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 23:13:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:13:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 23:13:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-06 23:13:47,511 INFO L87 Difference]: Start difference. First operand 214938 states and 356166 transitions. Second operand 8 states. [2020-11-06 23:13:49,013 WARN L194 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 447 [2020-11-06 23:15:07,347 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:15:08,937 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 442 [2020-11-06 23:15:10,589 WARN L194 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 446 [2020-11-06 23:15:12,241 WARN L194 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 444 [2020-11-06 23:15:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:15:34,094 INFO L93 Difference]: Finished difference Result 1123724 states and 1865909 transitions. [2020-11-06 23:15:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 23:15:34,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 432 [2020-11-06 23:15:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:15:36,496 INFO L225 Difference]: With dead ends: 1123724 [2020-11-06 23:15:36,496 INFO L226 Difference]: Without dead ends: 909492 [2020-11-06 23:15:36,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-11-06 23:15:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909492 states. [2020-11-06 23:15:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909492 to 427813. [2020-11-06 23:15:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427813 states. [2020-11-06 23:16:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427813 states to 427813 states and 706032 transitions. [2020-11-06 23:16:01,182 INFO L78 Accepts]: Start accepts. Automaton has 427813 states and 706032 transitions. Word has length 432 [2020-11-06 23:16:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:16:01,182 INFO L481 AbstractCegarLoop]: Abstraction has 427813 states and 706032 transitions. [2020-11-06 23:16:01,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 23:16:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 427813 states and 706032 transitions. [2020-11-06 23:16:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-11-06 23:16:01,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:16:01,563 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] [2020-11-06 23:16:01,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:16:01,564 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:16:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:16:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash -594172234, now seen corresponding path program 1 times [2020-11-06 23:16:01,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:16:01,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037682319] [2020-11-06 23:16:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:16:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:16:03,684 WARN L194 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 439 [2020-11-06 23:16:03,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:16:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:16:04,017 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 23:16:04,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037682319] [2020-11-06 23:16:04,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:16:04,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:16:04,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767663397] [2020-11-06 23:16:04,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:16:04,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:16:04,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:16:04,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:16:04,020 INFO L87 Difference]: Start difference. First operand 427813 states and 706032 transitions. Second operand 5 states. [2020-11-06 23:16:05,602 WARN L194 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 442 [2020-11-06 23:16:59,670 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 441