/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:59:58,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:59:58,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:59:58,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:59:58,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:59:58,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:59:58,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:59:58,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:59:58,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:59:58,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:59:58,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:59:58,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:59:58,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:59:58,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:59:58,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:59:58,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:59:58,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:59:58,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:59:58,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:59:58,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:59:58,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:59:58,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:59:58,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:59:58,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:59:58,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:59:58,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:59:58,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:59:58,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:59:58,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:59:58,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:59:58,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:59:58,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:59:58,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:59:58,648 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:59:58,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:59:58,649 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:59:58,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:59:58,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:59:58,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:59:58,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:59:58,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:59:58,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:59:58,651 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:59:58,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:59:58,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:59:58,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:59:58,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:59:58,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:59:58,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:59:58,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:59:58,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:59:58,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:59:58,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:59:58,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:59:58,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:59:58,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:59:58,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:59:58,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:59:58,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:59:59,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:59:59,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:59:59,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:59:59,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:59:59,145 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:59:59,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 18:59:59,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02faa192/b3645c0e5736425795a25cbf7f4c72ee/FLAG155a7fa0f [2020-10-23 19:00:00,093 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:00:00,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:00:00,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02faa192/b3645c0e5736425795a25cbf7f4c72ee/FLAG155a7fa0f [2020-10-23 19:00:00,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02faa192/b3645c0e5736425795a25cbf7f4c72ee [2020-10-23 19:00:00,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:00:00,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:00:00,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:00,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:00:00,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:00:00,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:00:00" (1/1) ... [2020-10-23 19:00:00,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7946c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:00, skipping insertion in model container [2020-10-23 19:00:00,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:00:00" (1/1) ... [2020-10-23 19:00:00,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:00:00,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:00:01,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:01,791 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:00:02,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:02,635 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:00:02,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02 WrapperNode [2020-10-23 19:00:02,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:02,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:00:02,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:00:02,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:00:02,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... [2020-10-23 19:00:02,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:00:02,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:00:02,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:00:02,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:00:02,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:00:02,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:00:02,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:00:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:00:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:00:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:00:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:00:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:00:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:00:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:00:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:00:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:00:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:00:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:00:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:00:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:00:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:00:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:00:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:00:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:00:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:00:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:00:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:00:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:00:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:00:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:00:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:00:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:00:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:00:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:00:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:00:07,302 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:00:07,302 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:00:07,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:00:07 BoogieIcfgContainer [2020-10-23 19:00:07,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:00:07,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:00:07,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:00:07,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:00:07,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:00:00" (1/3) ... [2020-10-23 19:00:07,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb441f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:00:07, skipping insertion in model container [2020-10-23 19:00:07,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:02" (2/3) ... [2020-10-23 19:00:07,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb441f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:00:07, skipping insertion in model container [2020-10-23 19:00:07,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:00:07" (3/3) ... [2020-10-23 19:00:07,318 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:00:07,330 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:00:07,336 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:00:07,349 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:00:07,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:00:07,400 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:00:07,400 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:00:07,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:00:07,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:00:07,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:00:07,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:00:07,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:00:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states. [2020-10-23 19:00:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-23 19:00:07,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:07,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:00:07,486 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1030577711, now seen corresponding path program 1 times [2020-10-23 19:00:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:07,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566364072] [2020-10-23 19:00:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:10,095 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:00:10,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:10,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566364072] [2020-10-23 19:00:10,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:10,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:00:10,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205464255] [2020-10-23 19:00:10,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:00:10,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:00:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:00:10,685 INFO L87 Difference]: Start difference. First operand 1344 states. Second operand 4 states. [2020-10-23 19:00:12,086 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 413 [2020-10-23 19:00:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:00:22,800 INFO L93 Difference]: Finished difference Result 2268 states and 4040 transitions. [2020-10-23 19:00:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:00:22,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-10-23 19:00:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:00:22,850 INFO L225 Difference]: With dead ends: 2268 [2020-10-23 19:00:22,850 INFO L226 Difference]: Without dead ends: 1995 [2020-10-23 19:00:22,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:00:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2020-10-23 19:00:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1992. [2020-10-23 19:00:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2020-10-23 19:00:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 3231 transitions. [2020-10-23 19:00:23,048 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 3231 transitions. Word has length 477 [2020-10-23 19:00:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:00:23,049 INFO L481 AbstractCegarLoop]: Abstraction has 1992 states and 3231 transitions. [2020-10-23 19:00:23,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:00:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 3231 transitions. [2020-10-23 19:00:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-23 19:00:23,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:23,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:00:23,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:00:23,063 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash 985269987, now seen corresponding path program 1 times [2020-10-23 19:00:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:23,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128920379] [2020-10-23 19:00:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:25,465 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:00:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:25,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128920379] [2020-10-23 19:00:25,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:25,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:00:25,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104357546] [2020-10-23 19:00:25,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:00:25,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:00:26,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:00:26,004 INFO L87 Difference]: Start difference. First operand 1992 states and 3231 transitions. Second operand 5 states. [2020-10-23 19:00:39,845 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-23 19:00:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:00:42,574 INFO L93 Difference]: Finished difference Result 5907 states and 9582 transitions. [2020-10-23 19:00:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:00:42,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-10-23 19:00:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:00:42,598 INFO L225 Difference]: With dead ends: 5907 [2020-10-23 19:00:42,598 INFO L226 Difference]: Without dead ends: 3932 [2020-10-23 19:00:42,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:00:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2020-10-23 19:00:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3929. [2020-10-23 19:00:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3929 states. [2020-10-23 19:00:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 6349 transitions. [2020-10-23 19:00:42,830 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 6349 transitions. Word has length 477 [2020-10-23 19:00:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:00:42,831 INFO L481 AbstractCegarLoop]: Abstraction has 3929 states and 6349 transitions. [2020-10-23 19:00:42,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:00:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 6349 transitions. [2020-10-23 19:00:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-23 19:00:42,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:00:42,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:00:42,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:00:42,853 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:00:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:00:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1610888374, now seen corresponding path program 1 times [2020-10-23 19:00:42,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:00:42,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945912698] [2020-10-23 19:00:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:00:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:44,234 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:00:44,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:00:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:00:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:00:44,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945912698] [2020-10-23 19:00:44,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:00:44,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:00:44,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766367499] [2020-10-23 19:00:44,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:00:44,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:00:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:00:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:00:44,593 INFO L87 Difference]: Start difference. First operand 3929 states and 6349 transitions. Second operand 4 states. [2020-10-23 19:01:00,971 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-23 19:01:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:03,741 INFO L93 Difference]: Finished difference Result 11485 states and 18516 transitions. [2020-10-23 19:01:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:03,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-10-23 19:01:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:03,783 INFO L225 Difference]: With dead ends: 11485 [2020-10-23 19:01:03,784 INFO L226 Difference]: Without dead ends: 7770 [2020-10-23 19:01:03,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7770 states. [2020-10-23 19:01:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7770 to 7767. [2020-10-23 19:01:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7767 states. [2020-10-23 19:01:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7767 states to 7767 states and 12510 transitions. [2020-10-23 19:01:04,224 INFO L78 Accepts]: Start accepts. Automaton has 7767 states and 12510 transitions. Word has length 479 [2020-10-23 19:01:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:04,226 INFO L481 AbstractCegarLoop]: Abstraction has 7767 states and 12510 transitions. [2020-10-23 19:01:04,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7767 states and 12510 transitions. [2020-10-23 19:01:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-23 19:01:04,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:04,256 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] [2020-10-23 19:01:04,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:01:04,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash 418576747, now seen corresponding path program 1 times [2020-10-23 19:01:04,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:04,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550177198] [2020-10-23 19:01:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:05,630 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:01:05,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:05,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550177198] [2020-10-23 19:01:05,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:05,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919904983] [2020-10-23 19:01:05,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:05,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:05,885 INFO L87 Difference]: Start difference. First operand 7767 states and 12510 transitions. Second operand 4 states. [2020-10-23 19:01:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:24,547 INFO L93 Difference]: Finished difference Result 23202 states and 37361 transitions. [2020-10-23 19:01:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:01:24,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-10-23 19:01:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:24,618 INFO L225 Difference]: With dead ends: 23202 [2020-10-23 19:01:24,618 INFO L226 Difference]: Without dead ends: 15487 [2020-10-23 19:01:24,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-10-23 19:01:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7814. [2020-10-23 19:01:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7814 states. [2020-10-23 19:01:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 12584 transitions. [2020-10-23 19:01:25,159 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 12584 transitions. Word has length 480 [2020-10-23 19:01:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:25,159 INFO L481 AbstractCegarLoop]: Abstraction has 7814 states and 12584 transitions. [2020-10-23 19:01:25,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 12584 transitions. [2020-10-23 19:01:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-23 19:01:25,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:25,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:01:25,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:01:25,184 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash -410388017, now seen corresponding path program 1 times [2020-10-23 19:01:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:25,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664876742] [2020-10-23 19:01:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:26,644 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:01:26,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:26,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664876742] [2020-10-23 19:01:26,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:26,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:26,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440095938] [2020-10-23 19:01:26,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:26,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:26,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:26,987 INFO L87 Difference]: Start difference. First operand 7814 states and 12584 transitions. Second operand 4 states. [2020-10-23 19:01:44,337 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-23 19:01:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:47,190 INFO L93 Difference]: Finished difference Result 22719 states and 36479 transitions. [2020-10-23 19:01:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:47,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-10-23 19:01:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:47,228 INFO L225 Difference]: With dead ends: 22719 [2020-10-23 19:01:47,229 INFO L226 Difference]: Without dead ends: 15304 [2020-10-23 19:01:47,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15304 states. [2020-10-23 19:01:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15304 to 15301. [2020-10-23 19:01:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15301 states. [2020-10-23 19:01:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15301 states to 15301 states and 24522 transitions. [2020-10-23 19:01:48,020 INFO L78 Accepts]: Start accepts. Automaton has 15301 states and 24522 transitions. Word has length 481 [2020-10-23 19:01:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:48,021 INFO L481 AbstractCegarLoop]: Abstraction has 15301 states and 24522 transitions. [2020-10-23 19:01:48,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 15301 states and 24522 transitions. [2020-10-23 19:01:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-23 19:01:48,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:48,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:01:48,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:01:48,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash -983986710, now seen corresponding path program 1 times [2020-10-23 19:01:48,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114566916] [2020-10-23 19:01:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:49,363 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:01:49,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:49,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114566916] [2020-10-23 19:01:49,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:49,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:49,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572986169] [2020-10-23 19:01:49,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:49,674 INFO L87 Difference]: Start difference. First operand 15301 states and 24522 transitions. Second operand 4 states. [2020-10-23 19:02:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:10,624 INFO L93 Difference]: Finished difference Result 45645 states and 73120 transitions. [2020-10-23 19:02:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:10,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-10-23 19:02:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:10,682 INFO L225 Difference]: With dead ends: 45645 [2020-10-23 19:02:10,682 INFO L226 Difference]: Without dead ends: 30488 [2020-10-23 19:02:10,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-10-23 19:02:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15399. [2020-10-23 19:02:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15399 states. [2020-10-23 19:02:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 24673 transitions. [2020-10-23 19:02:11,763 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 24673 transitions. Word has length 481 [2020-10-23 19:02:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:11,763 INFO L481 AbstractCegarLoop]: Abstraction has 15399 states and 24673 transitions. [2020-10-23 19:02:11,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 24673 transitions. [2020-10-23 19:02:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-23 19:02:11,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:11,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:11,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:02:11,793 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1130257274, now seen corresponding path program 1 times [2020-10-23 19:02:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:11,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098504401] [2020-10-23 19:02:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:13,198 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:02:13,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098504401] [2020-10-23 19:02:13,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:13,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:13,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295537882] [2020-10-23 19:02:13,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:13,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:13,460 INFO L87 Difference]: Start difference. First operand 15399 states and 24673 transitions. Second operand 4 states. [2020-10-23 19:02:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:34,390 INFO L93 Difference]: Finished difference Result 45780 states and 73301 transitions. [2020-10-23 19:02:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:34,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-10-23 19:02:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:34,447 INFO L225 Difference]: With dead ends: 45780 [2020-10-23 19:02:34,447 INFO L226 Difference]: Without dead ends: 30605 [2020-10-23 19:02:34,476 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 [2020-10-23 19:02:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-10-23 19:02:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15516. [2020-10-23 19:02:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15516 states. [2020-10-23 19:02:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15516 states to 15516 states and 24819 transitions. [2020-10-23 19:02:35,485 INFO L78 Accepts]: Start accepts. Automaton has 15516 states and 24819 transitions. Word has length 482 [2020-10-23 19:02:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:35,486 INFO L481 AbstractCegarLoop]: Abstraction has 15516 states and 24819 transitions. [2020-10-23 19:02:35,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 15516 states and 24819 transitions. [2020-10-23 19:02:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-10-23 19:02:35,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:35,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:35,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:02:35,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash 86246452, now seen corresponding path program 1 times [2020-10-23 19:02:35,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:35,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346001897] [2020-10-23 19:02:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:37,029 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:02:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346001897] [2020-10-23 19:02:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:37,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611039592] [2020-10-23 19:02:37,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:37,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:37,554 INFO L87 Difference]: Start difference. First operand 15516 states and 24819 transitions. Second operand 4 states. [2020-10-23 19:02:56,554 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-23 19:02:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:59,757 INFO L93 Difference]: Finished difference Result 44737 states and 71396 transitions. [2020-10-23 19:02:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:59,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-10-23 19:02:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:59,805 INFO L225 Difference]: With dead ends: 44737 [2020-10-23 19:02:59,806 INFO L226 Difference]: Without dead ends: 30190 [2020-10-23 19:02:59,828 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 [2020-10-23 19:02:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30190 states. [2020-10-23 19:03:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30190 to 30187. [2020-10-23 19:03:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30187 states. [2020-10-23 19:03:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30187 states to 30187 states and 48060 transitions. [2020-10-23 19:03:01,472 INFO L78 Accepts]: Start accepts. Automaton has 30187 states and 48060 transitions. Word has length 483 [2020-10-23 19:03:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:01,473 INFO L481 AbstractCegarLoop]: Abstraction has 30187 states and 48060 transitions. [2020-10-23 19:03:01,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 30187 states and 48060 transitions. [2020-10-23 19:03:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-10-23 19:03:01,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:01,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:01,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:03:01,516 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1450944503, now seen corresponding path program 1 times [2020-10-23 19:03:01,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:01,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648306636] [2020-10-23 19:03:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:03,667 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:03:03,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:04,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648306636] [2020-10-23 19:03:04,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:04,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:04,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234416361] [2020-10-23 19:03:04,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:04,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:04,144 INFO L87 Difference]: Start difference. First operand 30187 states and 48060 transitions. Second operand 5 states. [2020-10-23 19:03:20,719 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-23 19:03:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:24,416 INFO L93 Difference]: Finished difference Result 88873 states and 141440 transitions. [2020-10-23 19:03:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:24,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2020-10-23 19:03:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:24,478 INFO L225 Difference]: With dead ends: 88873 [2020-10-23 19:03:24,478 INFO L226 Difference]: Without dead ends: 58904 [2020-10-23 19:03:24,505 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 [2020-10-23 19:03:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58904 states. [2020-10-23 19:03:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58904 to 58901. [2020-10-23 19:03:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58901 states. [2020-10-23 19:03:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58901 states to 58901 states and 93323 transitions. [2020-10-23 19:03:27,844 INFO L78 Accepts]: Start accepts. Automaton has 58901 states and 93323 transitions. Word has length 483 [2020-10-23 19:03:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 58901 states and 93323 transitions. [2020-10-23 19:03:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 58901 states and 93323 transitions. [2020-10-23 19:03:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-23 19:03:27,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:27,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:03:27,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:03:27,916 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:27,917 INFO L82 PathProgramCache]: Analyzing trace with hash 677919546, now seen corresponding path program 1 times [2020-10-23 19:03:27,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:27,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075553384] [2020-10-23 19:03:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:29,417 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:03:29,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:30,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075553384] [2020-10-23 19:03:30,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:30,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:30,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431354705] [2020-10-23 19:03:30,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:30,233 INFO L87 Difference]: Start difference. First operand 58901 states and 93323 transitions. Second operand 4 states. [2020-10-23 19:03:53,366 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 417 [2020-10-23 19:03:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:57,730 INFO L93 Difference]: Finished difference Result 173521 states and 274692 transitions. [2020-10-23 19:03:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:57,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-10-23 19:03:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:57,893 INFO L225 Difference]: With dead ends: 173521 [2020-10-23 19:03:57,893 INFO L226 Difference]: Without dead ends: 116162 [2020-10-23 19:03:57,948 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 [2020-10-23 19:03:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116162 states. [2020-10-23 19:04:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116162 to 116159. [2020-10-23 19:04:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116159 states. [2020-10-23 19:04:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116159 states to 116159 states and 183305 transitions. [2020-10-23 19:04:04,873 INFO L78 Accepts]: Start accepts. Automaton has 116159 states and 183305 transitions. Word has length 485 [2020-10-23 19:04:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:04,874 INFO L481 AbstractCegarLoop]: Abstraction has 116159 states and 183305 transitions. [2020-10-23 19:04:04,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 116159 states and 183305 transitions. [2020-10-23 19:04:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-23 19:04:05,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:05,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:04:05,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:04:05,313 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:05,316 INFO L82 PathProgramCache]: Analyzing trace with hash 727190402, now seen corresponding path program 1 times [2020-10-23 19:04:05,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:05,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536311266] [2020-10-23 19:04:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:07,715 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:04:07,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:08,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536311266] [2020-10-23 19:04:08,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:08,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:04:08,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433991832] [2020-10-23 19:04:08,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:04:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:08,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:04:08,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:08,203 INFO L87 Difference]: Start difference. First operand 116159 states and 183305 transitions. Second operand 5 states. [2020-10-23 19:04:32,614 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-23 19:04:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:38,879 INFO L93 Difference]: Finished difference Result 344639 states and 543774 transitions. [2020-10-23 19:04:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:04:38,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-10-23 19:04:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:39,402 INFO L225 Difference]: With dead ends: 344639 [2020-10-23 19:04:39,402 INFO L226 Difference]: Without dead ends: 228817 [2020-10-23 19:04:39,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:04:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228817 states. [2020-10-23 19:04:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228817 to 228814. [2020-10-23 19:04:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228814 states. [2020-10-23 19:04:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228814 states to 228814 states and 359455 transitions. [2020-10-23 19:04:53,649 INFO L78 Accepts]: Start accepts. Automaton has 228814 states and 359455 transitions. Word has length 487 [2020-10-23 19:04:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:53,649 INFO L481 AbstractCegarLoop]: Abstraction has 228814 states and 359455 transitions. [2020-10-23 19:04:53,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:04:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 228814 states and 359455 transitions. [2020-10-23 19:04:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-23 19:04:53,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:53,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:04:53,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:04:53,852 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 323831073, now seen corresponding path program 1 times [2020-10-23 19:04:53,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:53,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784359827] [2020-10-23 19:04:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:56,034 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:04:56,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:56,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784359827] [2020-10-23 19:04:56,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:56,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:04:56,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800465485] [2020-10-23 19:04:56,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:04:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:04:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:56,432 INFO L87 Difference]: Start difference. First operand 228814 states and 359455 transitions. Second operand 5 states. [2020-10-23 19:05:31,219 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-23 19:05:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:40,820 INFO L93 Difference]: Finished difference Result 679806 states and 1067625 transitions. [2020-10-23 19:05:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:05:40,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 489 [2020-10-23 19:05:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:41,878 INFO L225 Difference]: With dead ends: 679806 [2020-10-23 19:05:41,878 INFO L226 Difference]: Without dead ends: 451843 [2020-10-23 19:05:42,072 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 [2020-10-23 19:05:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451843 states. [2020-10-23 19:06:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451843 to 451840. [2020-10-23 19:06:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451840 states. [2020-10-23 19:06:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451840 states to 451840 states and 706561 transitions. [2020-10-23 19:06:13,149 INFO L78 Accepts]: Start accepts. Automaton has 451840 states and 706561 transitions. Word has length 489 [2020-10-23 19:06:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:13,150 INFO L481 AbstractCegarLoop]: Abstraction has 451840 states and 706561 transitions. [2020-10-23 19:06:13,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:06:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 451840 states and 706561 transitions. [2020-10-23 19:06:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-23 19:06:13,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:13,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:13,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:06:13,798 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash 646411240, now seen corresponding path program 1 times [2020-10-23 19:06:13,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:13,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375430674] [2020-10-23 19:06:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:15,973 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-23 19:06:15,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:16,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375430674] [2020-10-23 19:06:16,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:16,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:16,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588654546] [2020-10-23 19:06:16,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:16,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:16,729 INFO L87 Difference]: Start difference. First operand 451840 states and 706561 transitions. Second operand 4 states.