/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:00:28,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:00:28,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:00:28,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:00:28,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:00:28,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:00:28,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:00:28,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:00:28,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:00:28,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:00:28,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:00:28,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:00:28,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:00:28,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:00:28,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:00:28,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:00:28,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:00:28,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:00:28,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:00:28,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:00:28,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:00:28,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:00:28,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:00:28,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:00:28,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:00:28,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:00:28,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:00:28,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:00:28,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:00:28,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:00:28,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:00:28,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:00:28,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:00:28,706 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:00:28,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:00:28,706 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:00:28,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:00:28,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:00:28,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:00:28,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:00:28,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:00:28,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:00:28,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:00:28,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:00:28,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:00:28,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:00:28,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:00:28,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:00:28,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:00:28,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:00:28,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:00:28,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:00:28,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:00:28,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:00:28,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:00:28,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:00:28,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:00:28,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:00:28,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:00:29,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:00:29,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:00:29,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:00:29,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:00:29,232 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:00:29,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-11-06 23:00:29,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d47175092/38e783e869e74570b2b2f6128f26ae9e/FLAG8f7eb9dae [2020-11-06 23:00:30,338 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:00:30,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-11-06 23:00:30,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d47175092/38e783e869e74570b2b2f6128f26ae9e/FLAG8f7eb9dae [2020-11-06 23:00:30,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d47175092/38e783e869e74570b2b2f6128f26ae9e [2020-11-06 23:00:30,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:00:30,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:00:30,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:30,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:00:30,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:00:30,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:30" (1/1) ... [2020-11-06 23:00:30,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298493e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:30, skipping insertion in model container [2020-11-06 23:00:30,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:30" (1/1) ... [2020-11-06 23:00:30,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:00:31,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:00:32,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:32,779 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:00:33,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:33,725 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:00:33,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33 WrapperNode [2020-11-06 23:00:33,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:33,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:00:33,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:00:33,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:00:33,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:33,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:33,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:33,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:33,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:33,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:33,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... [2020-11-06 23:00:34,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:00:34,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:00:34,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:00:34,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:00:34,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:00:34,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:00:34,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:00:34,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:00:34,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:00:34,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:00:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:00:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:00:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:00:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:00:34,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:00:34,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:00:34,120 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:00:34,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:00:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:00:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:00:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:00:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:00:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:00:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:00:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:00:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:00:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:00:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:00:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:00:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:00:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:00:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:00:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:00:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:00:38,938 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:00:38,938 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:00:38,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:38 BoogieIcfgContainer [2020-11-06 23:00:38,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:00:38,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:00:38,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:00:38,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:00:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:00:30" (1/3) ... [2020-11-06 23:00:38,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eec5ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:38, skipping insertion in model container [2020-11-06 23:00:38,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:33" (2/3) ... [2020-11-06 23:00:38,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eec5ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:38, skipping insertion in model container [2020-11-06 23:00:38,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:38" (3/3) ... [2020-11-06 23:00:38,952 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-11-06 23:00:38,970 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:00:38,978 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:00:38,993 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:00:39,046 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:00:39,046 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:00:39,046 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:00:39,046 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:00:39,047 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:00:39,047 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:00:39,047 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:00:39,047 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:00:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states. [2020-11-06 23:00:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-11-06 23:00:39,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:00:39,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:00:39,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:00:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:00:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1366298238, now seen corresponding path program 1 times [2020-11-06 23:00:39,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:00:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875354705] [2020-11-06 23:00:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:00:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:41,854 WARN L194 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:00:41,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:00:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:00:42,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875354705] [2020-11-06 23:00:42,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:00:42,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:00:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296612091] [2020-11-06 23:00:42,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:00:42,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:00:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:00:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:00:42,599 INFO L87 Difference]: Start difference. First operand 1326 states. Second operand 4 states. [2020-11-06 23:00:44,137 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 419 [2020-11-06 23:00:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:00:56,575 INFO L93 Difference]: Finished difference Result 2218 states and 3955 transitions. [2020-11-06 23:00:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:00:56,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-11-06 23:00:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:00:56,624 INFO L225 Difference]: With dead ends: 2218 [2020-11-06 23:00:56,624 INFO L226 Difference]: Without dead ends: 1958 [2020-11-06 23:00:56,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:00:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2020-11-06 23:00:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2020-11-06 23:00:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2020-11-06 23:00:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 3184 transitions. [2020-11-06 23:00:56,850 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 3184 transitions. Word has length 468 [2020-11-06 23:00:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:00:56,856 INFO L481 AbstractCegarLoop]: Abstraction has 1955 states and 3184 transitions. [2020-11-06 23:00:56,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:00:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 3184 transitions. [2020-11-06 23:00:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-11-06 23:00:56,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:00:56,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:00:56,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:00:56,875 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:00:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:00:56,876 INFO L82 PathProgramCache]: Analyzing trace with hash 863376515, now seen corresponding path program 1 times [2020-11-06 23:00:56,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:00:56,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593712116] [2020-11-06 23:00:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:00:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:59,827 WARN L194 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:00:59,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:00:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:00,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593712116] [2020-11-06 23:01:00,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:00,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:01:00,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885246428] [2020-11-06 23:01:00,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:01:00,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:01:00,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:00,392 INFO L87 Difference]: Start difference. First operand 1955 states and 3184 transitions. Second operand 5 states. [2020-11-06 23:01:16,909 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:01:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:20,109 INFO L93 Difference]: Finished difference Result 5796 states and 9441 transitions. [2020-11-06 23:01:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:01:20,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 468 [2020-11-06 23:01:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:20,133 INFO L225 Difference]: With dead ends: 5796 [2020-11-06 23:01:20,133 INFO L226 Difference]: Without dead ends: 3858 [2020-11-06 23:01:20,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:01:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2020-11-06 23:01:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3855. [2020-11-06 23:01:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3855 states. [2020-11-06 23:01:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 6255 transitions. [2020-11-06 23:01:20,361 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 6255 transitions. Word has length 468 [2020-11-06 23:01:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:20,362 INFO L481 AbstractCegarLoop]: Abstraction has 3855 states and 6255 transitions. [2020-11-06 23:01:20,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:01:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 6255 transitions. [2020-11-06 23:01:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-11-06 23:01:20,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:20,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:20,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:01:20,386 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1264489855, now seen corresponding path program 1 times [2020-11-06 23:01:20,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:20,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373246230] [2020-11-06 23:01:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:22,067 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:01:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:22,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373246230] [2020-11-06 23:01:22,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:22,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:22,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325900795] [2020-11-06 23:01:22,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:22,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:22,492 INFO L87 Difference]: Start difference. First operand 3855 states and 6255 transitions. Second operand 4 states. [2020-11-06 23:01:41,621 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 423 [2020-11-06 23:01:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:44,620 INFO L93 Difference]: Finished difference Result 11263 states and 18234 transitions. [2020-11-06 23:01:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:01:44,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-11-06 23:01:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:44,659 INFO L225 Difference]: With dead ends: 11263 [2020-11-06 23:01:44,660 INFO L226 Difference]: Without dead ends: 7622 [2020-11-06 23:01:44,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2020-11-06 23:01:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 7619. [2020-11-06 23:01:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7619 states. [2020-11-06 23:01:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7619 states to 7619 states and 12322 transitions. [2020-11-06 23:01:45,001 INFO L78 Accepts]: Start accepts. Automaton has 7619 states and 12322 transitions. Word has length 470 [2020-11-06 23:01:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:45,002 INFO L481 AbstractCegarLoop]: Abstraction has 7619 states and 12322 transitions. [2020-11-06 23:01:45,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7619 states and 12322 transitions. [2020-11-06 23:01:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-11-06 23:01:45,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:45,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:45,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:01:45,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1750929165, now seen corresponding path program 1 times [2020-11-06 23:01:45,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:45,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8180206] [2020-11-06 23:01:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:46,490 WARN L194 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:01:46,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8180206] [2020-11-06 23:01:46,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:46,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994947345] [2020-11-06 23:01:46,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:46,778 INFO L87 Difference]: Start difference. First operand 7619 states and 12322 transitions. Second operand 4 states. [2020-11-06 23:02:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:06,598 INFO L93 Difference]: Finished difference Result 22758 states and 36797 transitions. [2020-11-06 23:02:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:06,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-11-06 23:02:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:06,666 INFO L225 Difference]: With dead ends: 22758 [2020-11-06 23:02:06,667 INFO L226 Difference]: Without dead ends: 15191 [2020-11-06 23:02:06,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2020-11-06 23:02:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 7666. [2020-11-06 23:02:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7666 states. [2020-11-06 23:02:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 12396 transitions. [2020-11-06 23:02:07,265 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 12396 transitions. Word has length 471 [2020-11-06 23:02:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:07,266 INFO L481 AbstractCegarLoop]: Abstraction has 7666 states and 12396 transitions. [2020-11-06 23:02:07,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 12396 transitions. [2020-11-06 23:02:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-11-06 23:02:07,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:07,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:07,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:02:07,290 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1979852602, now seen corresponding path program 1 times [2020-11-06 23:02:07,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:07,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120699211] [2020-11-06 23:02:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:08,732 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:02:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:09,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120699211] [2020-11-06 23:02:09,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:09,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:09,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338647463] [2020-11-06 23:02:09,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:09,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:09,085 INFO L87 Difference]: Start difference. First operand 7666 states and 12396 transitions. Second operand 4 states. [2020-11-06 23:02:26,944 WARN L194 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 423 [2020-11-06 23:02:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:29,791 INFO L93 Difference]: Finished difference Result 22275 states and 35915 transitions. [2020-11-06 23:02:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:29,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-11-06 23:02:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:29,830 INFO L225 Difference]: With dead ends: 22275 [2020-11-06 23:02:29,830 INFO L226 Difference]: Without dead ends: 15008 [2020-11-06 23:02:29,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15008 states. [2020-11-06 23:02:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15008 to 15005. [2020-11-06 23:02:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15005 states. [2020-11-06 23:02:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15005 states to 15005 states and 24146 transitions. [2020-11-06 23:02:30,493 INFO L78 Accepts]: Start accepts. Automaton has 15005 states and 24146 transitions. Word has length 472 [2020-11-06 23:02:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:30,494 INFO L481 AbstractCegarLoop]: Abstraction has 15005 states and 24146 transitions. [2020-11-06 23:02:30,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 15005 states and 24146 transitions. [2020-11-06 23:02:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-11-06 23:02:30,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:30,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:30,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:02:30,530 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:30,531 INFO L82 PathProgramCache]: Analyzing trace with hash 579172543, now seen corresponding path program 1 times [2020-11-06 23:02:30,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:30,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407620019] [2020-11-06 23:02:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:31,961 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:02:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:32,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407620019] [2020-11-06 23:02:32,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:32,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:32,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626744262] [2020-11-06 23:02:32,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:32,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:32,172 INFO L87 Difference]: Start difference. First operand 15005 states and 24146 transitions. Second operand 4 states. [2020-11-06 23:02:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:52,875 INFO L93 Difference]: Finished difference Result 44757 states and 71992 transitions. [2020-11-06 23:02:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:52,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-11-06 23:02:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:52,930 INFO L225 Difference]: With dead ends: 44757 [2020-11-06 23:02:52,931 INFO L226 Difference]: Without dead ends: 29896 [2020-11-06 23:02:52,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-11-06 23:02:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 15103. [2020-11-06 23:02:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15103 states. [2020-11-06 23:02:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15103 states to 15103 states and 24297 transitions. [2020-11-06 23:02:53,919 INFO L78 Accepts]: Start accepts. Automaton has 15103 states and 24297 transitions. Word has length 472 [2020-11-06 23:02:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:53,919 INFO L481 AbstractCegarLoop]: Abstraction has 15103 states and 24297 transitions. [2020-11-06 23:02:53,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 15103 states and 24297 transitions. [2020-11-06 23:02:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-11-06 23:02:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:53,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:53,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:02:53,947 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash 870740542, now seen corresponding path program 1 times [2020-11-06 23:02:53,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:53,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898116689] [2020-11-06 23:02:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:55,362 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:02:55,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898116689] [2020-11-06 23:02:55,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:55,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:55,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539075089] [2020-11-06 23:02:55,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:55,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:55,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:55,678 INFO L87 Difference]: Start difference. First operand 15103 states and 24297 transitions. Second operand 4 states. [2020-11-06 23:03:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:17,405 INFO L93 Difference]: Finished difference Result 44892 states and 72173 transitions. [2020-11-06 23:03:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:17,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-11-06 23:03:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:17,477 INFO L225 Difference]: With dead ends: 44892 [2020-11-06 23:03:17,478 INFO L226 Difference]: Without dead ends: 30013 [2020-11-06 23:03:17,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30013 states. [2020-11-06 23:03:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30013 to 15220. [2020-11-06 23:03:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15220 states. [2020-11-06 23:03:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15220 states to 15220 states and 24443 transitions. [2020-11-06 23:03:18,554 INFO L78 Accepts]: Start accepts. Automaton has 15220 states and 24443 transitions. Word has length 473 [2020-11-06 23:03:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:18,554 INFO L481 AbstractCegarLoop]: Abstraction has 15220 states and 24443 transitions. [2020-11-06 23:03:18,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15220 states and 24443 transitions. [2020-11-06 23:03:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-11-06 23:03:18,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:18,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:18,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:18,580 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash -279312107, now seen corresponding path program 1 times [2020-11-06 23:03:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:18,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154320178] [2020-11-06 23:03:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:19,978 WARN L194 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:03:19,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:20,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154320178] [2020-11-06 23:03:20,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:20,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:20,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161866180] [2020-11-06 23:03:20,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:20,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:20,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:20,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:20,464 INFO L87 Difference]: Start difference. First operand 15220 states and 24443 transitions. Second operand 4 states. [2020-11-06 23:03:39,745 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 423 [2020-11-06 23:03:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:43,053 INFO L93 Difference]: Finished difference Result 43849 states and 70268 transitions. [2020-11-06 23:03:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:43,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-11-06 23:03:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:43,100 INFO L225 Difference]: With dead ends: 43849 [2020-11-06 23:03:43,100 INFO L226 Difference]: Without dead ends: 29598 [2020-11-06 23:03:43,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29598 states. [2020-11-06 23:03:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29598 to 29595. [2020-11-06 23:03:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29595 states. [2020-11-06 23:03:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29595 states to 29595 states and 47308 transitions. [2020-11-06 23:03:44,700 INFO L78 Accepts]: Start accepts. Automaton has 29595 states and 47308 transitions. Word has length 474 [2020-11-06 23:03:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:44,701 INFO L481 AbstractCegarLoop]: Abstraction has 29595 states and 47308 transitions. [2020-11-06 23:03:44,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 29595 states and 47308 transitions. [2020-11-06 23:03:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-11-06 23:03:44,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:44,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:44,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:44,734 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash -350384654, now seen corresponding path program 1 times [2020-11-06 23:03:44,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:44,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779645898] [2020-11-06 23:03:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:47,079 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:03:47,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:47,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779645898] [2020-11-06 23:03:47,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:47,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:47,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257258542] [2020-11-06 23:03:47,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:47,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:47,686 INFO L87 Difference]: Start difference. First operand 29595 states and 47308 transitions. Second operand 5 states. [2020-11-06 23:04:04,000 WARN L194 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:04:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:07,665 INFO L93 Difference]: Finished difference Result 87097 states and 139184 transitions. [2020-11-06 23:04:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:07,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-11-06 23:04:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:07,754 INFO L225 Difference]: With dead ends: 87097 [2020-11-06 23:04:07,754 INFO L226 Difference]: Without dead ends: 57720 [2020-11-06 23:04:07,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57720 states. [2020-11-06 23:04:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57720 to 57717. [2020-11-06 23:04:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57717 states. [2020-11-06 23:04:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57717 states to 57717 states and 91819 transitions. [2020-11-06 23:04:11,149 INFO L78 Accepts]: Start accepts. Automaton has 57717 states and 91819 transitions. Word has length 474 [2020-11-06 23:04:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:11,150 INFO L481 AbstractCegarLoop]: Abstraction has 57717 states and 91819 transitions. [2020-11-06 23:04:11,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 57717 states and 91819 transitions. [2020-11-06 23:04:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-11-06 23:04:11,212 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:11,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:11,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:11,212 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash -911336724, now seen corresponding path program 1 times [2020-11-06 23:04:11,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:11,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626857568] [2020-11-06 23:04:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:13,088 WARN L194 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:04:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:13,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626857568] [2020-11-06 23:04:13,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:13,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:13,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128232416] [2020-11-06 23:04:13,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:13,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:13,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:13,470 INFO L87 Difference]: Start difference. First operand 57717 states and 91819 transitions. Second operand 4 states. [2020-11-06 23:04:36,485 WARN L194 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 423 [2020-11-06 23:04:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:40,846 INFO L93 Difference]: Finished difference Result 169969 states and 270180 transitions. [2020-11-06 23:04:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:40,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-11-06 23:04:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:40,989 INFO L225 Difference]: With dead ends: 169969 [2020-11-06 23:04:40,989 INFO L226 Difference]: Without dead ends: 113794 [2020-11-06 23:04:41,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113794 states. [2020-11-06 23:04:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113794 to 113791. [2020-11-06 23:04:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113791 states. [2020-11-06 23:04:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113791 states to 113791 states and 180297 transitions. [2020-11-06 23:04:47,477 INFO L78 Accepts]: Start accepts. Automaton has 113791 states and 180297 transitions. Word has length 476 [2020-11-06 23:04:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:47,478 INFO L481 AbstractCegarLoop]: Abstraction has 113791 states and 180297 transitions. [2020-11-06 23:04:47,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 113791 states and 180297 transitions. [2020-11-06 23:04:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-11-06 23:04:47,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:47,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:47,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:47,596 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1960874023, now seen corresponding path program 1 times [2020-11-06 23:04:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:47,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727302115] [2020-11-06 23:04:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:49,701 WARN L194 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:04:49,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:50,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727302115] [2020-11-06 23:04:50,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:50,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:50,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919739854] [2020-11-06 23:04:50,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:50,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:50,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:50,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:50,023 INFO L87 Difference]: Start difference. First operand 113791 states and 180297 transitions. Second operand 4 states. [2020-11-06 23:05:17,971 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 423 [2020-11-06 23:05:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:23,739 INFO L93 Difference]: Finished difference Result 333804 states and 527972 transitions. [2020-11-06 23:05:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:23,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-11-06 23:05:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:24,296 INFO L225 Difference]: With dead ends: 333804 [2020-11-06 23:05:24,296 INFO L226 Difference]: Without dead ends: 223721 [2020-11-06 23:05:24,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223721 states. [2020-11-06 23:05:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223721 to 223718. [2020-11-06 23:05:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223718 states. [2020-11-06 23:05:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223718 states to 223718 states and 352809 transitions. [2020-11-06 23:05:38,132 INFO L78 Accepts]: Start accepts. Automaton has 223718 states and 352809 transitions. Word has length 478 [2020-11-06 23:05:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:38,133 INFO L481 AbstractCegarLoop]: Abstraction has 223718 states and 352809 transitions. [2020-11-06 23:05:38,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 223718 states and 352809 transitions. [2020-11-06 23:05:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-11-06 23:05:38,349 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:38,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:38,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:38,350 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash 914991172, now seen corresponding path program 1 times [2020-11-06 23:05:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:38,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003202211] [2020-11-06 23:05:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:40,897 WARN L194 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:05:40,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:41,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003202211] [2020-11-06 23:05:41,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:41,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:41,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166808660] [2020-11-06 23:05:41,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:41,245 INFO L87 Difference]: Start difference. First operand 223718 states and 352809 transitions. Second operand 5 states. [2020-11-06 23:06:15,439 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:06:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:24,342 INFO L93 Difference]: Finished difference Result 664574 states and 1047851 transitions. [2020-11-06 23:06:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:06:24,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 478 [2020-11-06 23:06:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:25,345 INFO L225 Difference]: With dead ends: 664574 [2020-11-06 23:06:25,345 INFO L226 Difference]: Without dead ends: 441244 [2020-11-06 23:06:25,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:06:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441244 states. [2020-11-06 23:06:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441244 to 441241. [2020-11-06 23:06:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441241 states. [2020-11-06 23:06:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441241 states to 441241 states and 692639 transitions. [2020-11-06 23:06:54,845 INFO L78 Accepts]: Start accepts. Automaton has 441241 states and 692639 transitions. Word has length 478 [2020-11-06 23:06:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:54,846 INFO L481 AbstractCegarLoop]: Abstraction has 441241 states and 692639 transitions. [2020-11-06 23:06:54,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 441241 states and 692639 transitions. [2020-11-06 23:06:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-11-06 23:06:55,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:55,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:55,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:06:55,521 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1008926737, now seen corresponding path program 1 times [2020-11-06 23:06:55,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:55,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002148194] [2020-11-06 23:06:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:57,911 WARN L194 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:06:57,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:58,604 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 23:06:58,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002148194] [2020-11-06 23:06:58,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:58,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:58,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398854014] [2020-11-06 23:06:58,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:58,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:58,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:58,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:58,607 INFO L87 Difference]: Start difference. First operand 441241 states and 692639 transitions. Second operand 4 states.