/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:41:19,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:41:19,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:41:19,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:41:19,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:41:19,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:41:19,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:41:19,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:41:19,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:41:19,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:41:19,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:41:19,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:41:19,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:41:19,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:41:19,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:41:19,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:41:19,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:41:19,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:41:19,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:41:19,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:41:19,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:41:19,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:41:19,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:41:19,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:41:19,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:41:19,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:41:19,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:41:19,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:41:19,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:41:19,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:41:19,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:41:19,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:41:19,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:41:19,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:41:19,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:41:19,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:41:19,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:41:19,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:41:19,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:41:19,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:41:19,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:41:19,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:41:19,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:41:19,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:41:19,695 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:41:19,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:41:19,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:41:19,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:41:19,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:41:19,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:41:19,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:41:19,696 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:41:20,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:41:20,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:41:20,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:41:20,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:41:20,209 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:41:20,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-11-07 06:41:20,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb0f6558/dd78b98712b54d62af57d7533d05736c/FLAG975b40772 [2020-11-07 06:41:21,163 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:41:21,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-11-07 06:41:21,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb0f6558/dd78b98712b54d62af57d7533d05736c/FLAG975b40772 [2020-11-07 06:41:21,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb0f6558/dd78b98712b54d62af57d7533d05736c [2020-11-07 06:41:21,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:41:21,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:41:21,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:41:21,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:41:21,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:41:21,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:21,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab29f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21, skipping insertion in model container [2020-11-07 06:41:21,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:21,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:41:21,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:41:21,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:41:21,828 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:41:21,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:41:21,929 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:41:21,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21 WrapperNode [2020-11-07 06:41:21,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:41:21,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:41:21,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:41:21,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:41:21,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:21,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:21,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:21,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:22,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:22,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:22,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... [2020-11-07 06:41:22,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:41:22,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:41:22,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:41:22,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:41:22,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:41:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:41:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:41:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:41:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:41:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:41:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:41:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:41:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:41:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-11-07 06:41:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-11-07 06:41:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:41:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:41:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:41:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 06:41:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:41:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:41:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:41:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:41:22,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 06:41:22,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:41:23,571 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:41:23,572 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 06:41:23,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:41:23 BoogieIcfgContainer [2020-11-07 06:41:23,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:41:23,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:41:23,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:41:23,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:41:23,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:41:21" (1/3) ... [2020-11-07 06:41:23,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f90e07d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:41:23, skipping insertion in model container [2020-11-07 06:41:23,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:41:21" (2/3) ... [2020-11-07 06:41:23,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f90e07d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:41:23, skipping insertion in model container [2020-11-07 06:41:23,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:41:23" (3/3) ... [2020-11-07 06:41:23,587 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-11-07 06:41:23,605 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:41:23,610 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:41:23,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:41:23,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:41:23,649 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:41:23,650 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:41:23,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:41:23,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:41:23,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:41:23,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:41:23,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:41:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states. [2020-11-07 06:41:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-07 06:41:23,706 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:23,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:23,709 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 873587710, now seen corresponding path program 1 times [2020-11-07 06:41:23,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:23,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134713001] [2020-11-07 06:41:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:24,611 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 06:41:24,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:24,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134713001] [2020-11-07 06:41:24,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:41:24,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:41:24,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050409627] [2020-11-07 06:41:24,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:41:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:41:24,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:41:24,888 INFO L87 Difference]: Start difference. First operand 356 states. Second operand 6 states. [2020-11-07 06:41:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:25,829 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2020-11-07 06:41:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:41:25,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 323 [2020-11-07 06:41:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:25,852 INFO L225 Difference]: With dead ends: 395 [2020-11-07 06:41:25,852 INFO L226 Difference]: Without dead ends: 355 [2020-11-07 06:41:25,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:41:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-11-07 06:41:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 336. [2020-11-07 06:41:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 06:41:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 337 transitions. [2020-11-07 06:41:25,948 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 337 transitions. Word has length 323 [2020-11-07 06:41:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:25,951 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 337 transitions. [2020-11-07 06:41:25,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:41:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 337 transitions. [2020-11-07 06:41:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-07 06:41:25,959 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:25,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:41:25,960 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1259668514, now seen corresponding path program 1 times [2020-11-07 06:41:25,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:25,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735748279] [2020-11-07 06:41:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:26,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735748279] [2020-11-07 06:41:26,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:41:26,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:41:26,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942904313] [2020-11-07 06:41:26,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:41:26,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:41:26,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:41:26,575 INFO L87 Difference]: Start difference. First operand 336 states and 337 transitions. Second operand 5 states. [2020-11-07 06:41:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:27,596 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2020-11-07 06:41:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:41:27,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-11-07 06:41:27,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:27,602 INFO L225 Difference]: With dead ends: 381 [2020-11-07 06:41:27,602 INFO L226 Difference]: Without dead ends: 355 [2020-11-07 06:41:27,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:41:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-11-07 06:41:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 341. [2020-11-07 06:41:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-11-07 06:41:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2020-11-07 06:41:27,669 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 323 [2020-11-07 06:41:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:27,672 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2020-11-07 06:41:27,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:41:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2020-11-07 06:41:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-11-07 06:41:27,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:27,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:27,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:41:27,681 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1311604414, now seen corresponding path program 1 times [2020-11-07 06:41:27,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:27,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381464590] [2020-11-07 06:41:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:28,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381464590] [2020-11-07 06:41:28,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:28,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:41:28,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704028736] [2020-11-07 06:41:28,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:41:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:41:28,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:41:28,186 INFO L87 Difference]: Start difference. First operand 341 states and 342 transitions. Second operand 6 states. [2020-11-07 06:41:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:29,362 INFO L93 Difference]: Finished difference Result 398 states and 401 transitions. [2020-11-07 06:41:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:41:29,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2020-11-07 06:41:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:29,367 INFO L225 Difference]: With dead ends: 398 [2020-11-07 06:41:29,367 INFO L226 Difference]: Without dead ends: 372 [2020-11-07 06:41:29,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:41:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-11-07 06:41:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 358. [2020-11-07 06:41:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-07 06:41:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-11-07 06:41:29,432 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 340 [2020-11-07 06:41:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-11-07 06:41:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:41:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-11-07 06:41:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-11-07 06:41:29,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:29,440 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:29,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:41:29,441 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash -750653346, now seen corresponding path program 2 times [2020-11-07 06:41:29,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:29,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647520284] [2020-11-07 06:41:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:29,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:29,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647520284] [2020-11-07 06:41:29,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:29,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:41:29,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406089132] [2020-11-07 06:41:29,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:41:29,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:41:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:41:29,875 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 7 states. [2020-11-07 06:41:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:31,098 INFO L93 Difference]: Finished difference Result 415 states and 418 transitions. [2020-11-07 06:41:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:41:31,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 357 [2020-11-07 06:41:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:31,105 INFO L225 Difference]: With dead ends: 415 [2020-11-07 06:41:31,106 INFO L226 Difference]: Without dead ends: 389 [2020-11-07 06:41:31,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:41:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-11-07 06:41:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-11-07 06:41:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-11-07 06:41:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 376 transitions. [2020-11-07 06:41:31,155 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 376 transitions. Word has length 357 [2020-11-07 06:41:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:31,157 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 376 transitions. [2020-11-07 06:41:31,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:41:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 376 transitions. [2020-11-07 06:41:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-11-07 06:41:31,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:31,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:31,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:41:31,166 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1632428862, now seen corresponding path program 3 times [2020-11-07 06:41:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:31,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245575902] [2020-11-07 06:41:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:31,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:31,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245575902] [2020-11-07 06:41:31,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:31,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:41:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728150683] [2020-11-07 06:41:31,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:41:31,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:41:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:41:31,652 INFO L87 Difference]: Start difference. First operand 375 states and 376 transitions. Second operand 8 states. [2020-11-07 06:41:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:32,999 INFO L93 Difference]: Finished difference Result 432 states and 435 transitions. [2020-11-07 06:41:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:41:33,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 374 [2020-11-07 06:41:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:33,005 INFO L225 Difference]: With dead ends: 432 [2020-11-07 06:41:33,006 INFO L226 Difference]: Without dead ends: 406 [2020-11-07 06:41:33,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:41:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-11-07 06:41:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 392. [2020-11-07 06:41:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-11-07 06:41:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 393 transitions. [2020-11-07 06:41:33,060 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 393 transitions. Word has length 374 [2020-11-07 06:41:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:33,061 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 393 transitions. [2020-11-07 06:41:33,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:41:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 393 transitions. [2020-11-07 06:41:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-11-07 06:41:33,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:33,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:33,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:41:33,066 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:33,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash -549731106, now seen corresponding path program 4 times [2020-11-07 06:41:33,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:33,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365004118] [2020-11-07 06:41:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:33,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:33,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365004118] [2020-11-07 06:41:33,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:33,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:41:33,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610297715] [2020-11-07 06:41:33,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:41:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:41:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:41:33,722 INFO L87 Difference]: Start difference. First operand 392 states and 393 transitions. Second operand 9 states. [2020-11-07 06:41:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:35,203 INFO L93 Difference]: Finished difference Result 449 states and 452 transitions. [2020-11-07 06:41:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:41:35,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 391 [2020-11-07 06:41:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:35,208 INFO L225 Difference]: With dead ends: 449 [2020-11-07 06:41:35,209 INFO L226 Difference]: Without dead ends: 423 [2020-11-07 06:41:35,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:41:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-11-07 06:41:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 409. [2020-11-07 06:41:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-11-07 06:41:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 410 transitions. [2020-11-07 06:41:35,275 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 410 transitions. Word has length 391 [2020-11-07 06:41:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:35,277 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 410 transitions. [2020-11-07 06:41:35,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:41:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 410 transitions. [2020-11-07 06:41:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-11-07 06:41:35,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:35,280 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:35,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:41:35,281 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash -66267070, now seen corresponding path program 5 times [2020-11-07 06:41:35,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:35,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573148442] [2020-11-07 06:41:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:35,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:35,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573148442] [2020-11-07 06:41:35,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:35,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:41:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693440084] [2020-11-07 06:41:35,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:41:35,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:41:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:41:35,924 INFO L87 Difference]: Start difference. First operand 409 states and 410 transitions. Second operand 10 states. [2020-11-07 06:41:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:37,563 INFO L93 Difference]: Finished difference Result 466 states and 469 transitions. [2020-11-07 06:41:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 06:41:37,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 408 [2020-11-07 06:41:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:37,568 INFO L225 Difference]: With dead ends: 466 [2020-11-07 06:41:37,568 INFO L226 Difference]: Without dead ends: 440 [2020-11-07 06:41:37,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:41:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-11-07 06:41:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2020-11-07 06:41:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-11-07 06:41:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2020-11-07 06:41:37,645 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 408 [2020-11-07 06:41:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:37,646 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2020-11-07 06:41:37,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:41:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2020-11-07 06:41:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-11-07 06:41:37,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:37,651 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:37,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:41:37,651 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1742702242, now seen corresponding path program 6 times [2020-11-07 06:41:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:37,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246845153] [2020-11-07 06:41:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:38,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:38,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246845153] [2020-11-07 06:41:38,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:38,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:41:38,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558223684] [2020-11-07 06:41:38,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:41:38,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:41:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:41:38,299 INFO L87 Difference]: Start difference. First operand 426 states and 427 transitions. Second operand 11 states. [2020-11-07 06:41:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:40,048 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2020-11-07 06:41:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:41:40,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 425 [2020-11-07 06:41:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:40,053 INFO L225 Difference]: With dead ends: 483 [2020-11-07 06:41:40,053 INFO L226 Difference]: Without dead ends: 457 [2020-11-07 06:41:40,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:41:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-11-07 06:41:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 443. [2020-11-07 06:41:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-11-07 06:41:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 444 transitions. [2020-11-07 06:41:40,115 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 444 transitions. Word has length 425 [2020-11-07 06:41:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:40,116 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 444 transitions. [2020-11-07 06:41:40,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:41:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 444 transitions. [2020-11-07 06:41:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-11-07 06:41:40,120 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:40,121 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:40,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:41:40,121 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2087210046, now seen corresponding path program 7 times [2020-11-07 06:41:40,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:40,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625790023] [2020-11-07 06:41:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:40,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 35 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:40,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625790023] [2020-11-07 06:41:40,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:40,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:41:40,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609847551] [2020-11-07 06:41:40,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:41:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:41:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:41:40,674 INFO L87 Difference]: Start difference. First operand 443 states and 444 transitions. Second operand 12 states. [2020-11-07 06:41:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:42,621 INFO L93 Difference]: Finished difference Result 500 states and 503 transitions. [2020-11-07 06:41:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:41:42,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 442 [2020-11-07 06:41:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:42,626 INFO L225 Difference]: With dead ends: 500 [2020-11-07 06:41:42,626 INFO L226 Difference]: Without dead ends: 474 [2020-11-07 06:41:42,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-11-07 06:41:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-11-07 06:41:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 460. [2020-11-07 06:41:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-11-07 06:41:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-11-07 06:41:42,702 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 442 [2020-11-07 06:41:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:42,704 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-11-07 06:41:42,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:41:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-11-07 06:41:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-11-07 06:41:42,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:42,711 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:42,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:41:42,711 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash -348647970, now seen corresponding path program 8 times [2020-11-07 06:41:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:42,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339267544] [2020-11-07 06:41:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:43,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 40 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:43,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339267544] [2020-11-07 06:41:43,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:43,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:41:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277574533] [2020-11-07 06:41:43,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:41:43,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:43,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:41:43,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:41:43,397 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 13 states. [2020-11-07 06:41:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:45,393 INFO L93 Difference]: Finished difference Result 517 states and 520 transitions. [2020-11-07 06:41:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:41:45,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 459 [2020-11-07 06:41:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:45,397 INFO L225 Difference]: With dead ends: 517 [2020-11-07 06:41:45,398 INFO L226 Difference]: Without dead ends: 491 [2020-11-07 06:41:45,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:41:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-11-07 06:41:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 477. [2020-11-07 06:41:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-11-07 06:41:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 478 transitions. [2020-11-07 06:41:45,451 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 478 transitions. Word has length 459 [2020-11-07 06:41:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:45,452 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 478 transitions. [2020-11-07 06:41:45,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:41:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 478 transitions. [2020-11-07 06:41:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-11-07 06:41:45,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:45,458 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:45,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:41:45,459 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2129940670, now seen corresponding path program 9 times [2020-11-07 06:41:45,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:45,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536975030] [2020-11-07 06:41:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:45,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 45 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:46,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536975030] [2020-11-07 06:41:46,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:46,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:41:46,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802728407] [2020-11-07 06:41:46,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:41:46,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:46,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:41:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:41:46,225 INFO L87 Difference]: Start difference. First operand 477 states and 478 transitions. Second operand 14 states. [2020-11-07 06:41:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:48,552 INFO L93 Difference]: Finished difference Result 534 states and 537 transitions. [2020-11-07 06:41:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 06:41:48,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 476 [2020-11-07 06:41:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:48,557 INFO L225 Difference]: With dead ends: 534 [2020-11-07 06:41:48,557 INFO L226 Difference]: Without dead ends: 508 [2020-11-07 06:41:48,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:41:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-11-07 06:41:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-11-07 06:41:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-11-07 06:41:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 495 transitions. [2020-11-07 06:41:48,622 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 495 transitions. Word has length 476 [2020-11-07 06:41:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:48,623 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 495 transitions. [2020-11-07 06:41:48,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:41:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 495 transitions. [2020-11-07 06:41:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-11-07 06:41:48,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:48,628 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:48,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:41:48,629 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1942651486, now seen corresponding path program 10 times [2020-11-07 06:41:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:48,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495855047] [2020-11-07 06:41:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:49,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 50 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:49,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495855047] [2020-11-07 06:41:49,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:49,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 06:41:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732745480] [2020-11-07 06:41:49,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 06:41:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 06:41:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:41:49,354 INFO L87 Difference]: Start difference. First operand 494 states and 495 transitions. Second operand 15 states. [2020-11-07 06:41:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:51,857 INFO L93 Difference]: Finished difference Result 551 states and 554 transitions. [2020-11-07 06:41:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:41:51,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 493 [2020-11-07 06:41:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:51,864 INFO L225 Difference]: With dead ends: 551 [2020-11-07 06:41:51,864 INFO L226 Difference]: Without dead ends: 525 [2020-11-07 06:41:51,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:41:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-11-07 06:41:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 511. [2020-11-07 06:41:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-11-07 06:41:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 512 transitions. [2020-11-07 06:41:51,925 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 512 transitions. Word has length 493 [2020-11-07 06:41:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:51,926 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 512 transitions. [2020-11-07 06:41:51,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 06:41:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 512 transitions. [2020-11-07 06:41:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-11-07 06:41:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:51,931 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:51,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:41:51,932 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1377880770, now seen corresponding path program 11 times [2020-11-07 06:41:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:51,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036576801] [2020-11-07 06:41:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:52,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 55 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:52,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036576801] [2020-11-07 06:41:52,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:52,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:41:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867176992] [2020-11-07 06:41:52,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:41:52,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:41:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:41:52,740 INFO L87 Difference]: Start difference. First operand 511 states and 512 transitions. Second operand 16 states. [2020-11-07 06:41:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:55,428 INFO L93 Difference]: Finished difference Result 568 states and 571 transitions. [2020-11-07 06:41:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 06:41:55,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 510 [2020-11-07 06:41:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:55,433 INFO L225 Difference]: With dead ends: 568 [2020-11-07 06:41:55,433 INFO L226 Difference]: Without dead ends: 542 [2020-11-07 06:41:55,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:41:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-11-07 06:41:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 528. [2020-11-07 06:41:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-11-07 06:41:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 529 transitions. [2020-11-07 06:41:55,490 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 529 transitions. Word has length 510 [2020-11-07 06:41:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:55,491 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 529 transitions. [2020-11-07 06:41:55,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:41:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 529 transitions. [2020-11-07 06:41:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-11-07 06:41:55,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:55,496 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:55,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:41:55,497 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash -81799458, now seen corresponding path program 12 times [2020-11-07 06:41:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:55,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125764334] [2020-11-07 06:41:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:56,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 60 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125764334] [2020-11-07 06:41:56,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:56,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-07 06:41:56,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702343895] [2020-11-07 06:41:56,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 06:41:56,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 06:41:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:41:56,294 INFO L87 Difference]: Start difference. First operand 528 states and 529 transitions. Second operand 17 states. [2020-11-07 06:41:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:59,080 INFO L93 Difference]: Finished difference Result 585 states and 588 transitions. [2020-11-07 06:41:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:41:59,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 527 [2020-11-07 06:41:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:59,085 INFO L225 Difference]: With dead ends: 585 [2020-11-07 06:41:59,085 INFO L226 Difference]: Without dead ends: 559 [2020-11-07 06:41:59,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:41:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-11-07 06:41:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 545. [2020-11-07 06:41:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-11-07 06:41:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 546 transitions. [2020-11-07 06:41:59,162 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 546 transitions. Word has length 527 [2020-11-07 06:41:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:59,163 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 546 transitions. [2020-11-07 06:41:59,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 06:41:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 546 transitions. [2020-11-07 06:41:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-11-07 06:41:59,169 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:59,169 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:59,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:41:59,170 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -426834366, now seen corresponding path program 13 times [2020-11-07 06:41:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:59,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405001151] [2020-11-07 06:41:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:00,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405001151] [2020-11-07 06:42:00,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:00,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:42:00,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644299651] [2020-11-07 06:42:00,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:42:00,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:42:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:42:00,176 INFO L87 Difference]: Start difference. First operand 545 states and 546 transitions. Second operand 18 states. [2020-11-07 06:42:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:03,223 INFO L93 Difference]: Finished difference Result 602 states and 605 transitions. [2020-11-07 06:42:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:42:03,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 544 [2020-11-07 06:42:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:03,229 INFO L225 Difference]: With dead ends: 602 [2020-11-07 06:42:03,230 INFO L226 Difference]: Without dead ends: 576 [2020-11-07 06:42:03,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:42:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-11-07 06:42:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 562. [2020-11-07 06:42:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-11-07 06:42:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 563 transitions. [2020-11-07 06:42:03,313 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 563 transitions. Word has length 544 [2020-11-07 06:42:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:03,314 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 563 transitions. [2020-11-07 06:42:03,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:42:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 563 transitions. [2020-11-07 06:42:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2020-11-07 06:42:03,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:03,320 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:03,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:42:03,322 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash -125826210, now seen corresponding path program 14 times [2020-11-07 06:42:03,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:03,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977924030] [2020-11-07 06:42:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:04,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 70 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:04,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977924030] [2020-11-07 06:42:04,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:04,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-07 06:42:04,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933770801] [2020-11-07 06:42:04,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 06:42:04,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 06:42:04,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:42:04,607 INFO L87 Difference]: Start difference. First operand 562 states and 563 transitions. Second operand 19 states. [2020-11-07 06:42:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:07,956 INFO L93 Difference]: Finished difference Result 619 states and 622 transitions. [2020-11-07 06:42:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 06:42:07,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 561 [2020-11-07 06:42:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:07,962 INFO L225 Difference]: With dead ends: 619 [2020-11-07 06:42:07,962 INFO L226 Difference]: Without dead ends: 593 [2020-11-07 06:42:07,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:42:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-11-07 06:42:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 579. [2020-11-07 06:42:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-11-07 06:42:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 580 transitions. [2020-11-07 06:42:08,045 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 580 transitions. Word has length 561 [2020-11-07 06:42:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:08,047 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 580 transitions. [2020-11-07 06:42:08,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 06:42:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 580 transitions. [2020-11-07 06:42:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-11-07 06:42:08,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:08,053 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:08,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:42:08,053 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1074684354, now seen corresponding path program 15 times [2020-11-07 06:42:08,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:08,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566871919] [2020-11-07 06:42:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:08,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1935 backedges. 75 proven. 1860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566871919] [2020-11-07 06:42:09,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:09,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:42:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437421198] [2020-11-07 06:42:09,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:42:09,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:09,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:42:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:42:09,074 INFO L87 Difference]: Start difference. First operand 579 states and 580 transitions. Second operand 20 states. [2020-11-07 06:42:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:12,698 INFO L93 Difference]: Finished difference Result 636 states and 639 transitions. [2020-11-07 06:42:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 06:42:12,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 578 [2020-11-07 06:42:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:12,704 INFO L225 Difference]: With dead ends: 636 [2020-11-07 06:42:12,704 INFO L226 Difference]: Without dead ends: 610 [2020-11-07 06:42:12,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:42:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-11-07 06:42:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 596. [2020-11-07 06:42:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-11-07 06:42:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 597 transitions. [2020-11-07 06:42:12,784 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 597 transitions. Word has length 578 [2020-11-07 06:42:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:12,785 INFO L481 AbstractCegarLoop]: Abstraction has 596 states and 597 transitions. [2020-11-07 06:42:12,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:42:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 597 transitions. [2020-11-07 06:42:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-11-07 06:42:12,791 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:12,791 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:12,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:42:12,792 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 288563166, now seen corresponding path program 16 times [2020-11-07 06:42:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:12,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366167125] [2020-11-07 06:42:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:13,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 80 proven. 2120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:13,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366167125] [2020-11-07 06:42:13,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:13,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-07 06:42:13,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343853143] [2020-11-07 06:42:13,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 06:42:13,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 06:42:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-11-07 06:42:13,896 INFO L87 Difference]: Start difference. First operand 596 states and 597 transitions. Second operand 21 states. [2020-11-07 06:42:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:17,852 INFO L93 Difference]: Finished difference Result 653 states and 656 transitions. [2020-11-07 06:42:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:42:17,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 595 [2020-11-07 06:42:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:17,858 INFO L225 Difference]: With dead ends: 653 [2020-11-07 06:42:17,858 INFO L226 Difference]: Without dead ends: 627 [2020-11-07 06:42:17,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:42:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-11-07 06:42:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-11-07 06:42:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-11-07 06:42:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 614 transitions. [2020-11-07 06:42:17,958 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 614 transitions. Word has length 595 [2020-11-07 06:42:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:17,959 INFO L481 AbstractCegarLoop]: Abstraction has 613 states and 614 transitions. [2020-11-07 06:42:17,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 06:42:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 614 transitions. [2020-11-07 06:42:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2020-11-07 06:42:17,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:17,966 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:17,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:42:17,966 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash -229188286, now seen corresponding path program 17 times [2020-11-07 06:42:17,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:17,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581956624] [2020-11-07 06:42:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:18,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2482 backedges. 85 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581956624] [2020-11-07 06:42:19,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:19,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:42:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662947492] [2020-11-07 06:42:19,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:42:19,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:19,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:42:19,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:42:19,193 INFO L87 Difference]: Start difference. First operand 613 states and 614 transitions. Second operand 22 states. [2020-11-07 06:42:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:23,396 INFO L93 Difference]: Finished difference Result 670 states and 673 transitions. [2020-11-07 06:42:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 06:42:23,397 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 612 [2020-11-07 06:42:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:23,402 INFO L225 Difference]: With dead ends: 670 [2020-11-07 06:42:23,402 INFO L226 Difference]: Without dead ends: 644 [2020-11-07 06:42:23,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:42:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-11-07 06:42:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 630. [2020-11-07 06:42:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-11-07 06:42:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 631 transitions. [2020-11-07 06:42:23,508 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 631 transitions. Word has length 612 [2020-11-07 06:42:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:23,509 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 631 transitions. [2020-11-07 06:42:23,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:42:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 631 transitions. [2020-11-07 06:42:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2020-11-07 06:42:23,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:23,518 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:23,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:42:23,518 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1736371106, now seen corresponding path program 18 times [2020-11-07 06:42:23,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:23,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777970620] [2020-11-07 06:42:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:24,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 90 proven. 2691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:24,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777970620] [2020-11-07 06:42:24,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:24,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-11-07 06:42:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478655347] [2020-11-07 06:42:24,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 06:42:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 06:42:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:42:24,898 INFO L87 Difference]: Start difference. First operand 630 states and 631 transitions. Second operand 23 states. [2020-11-07 06:42:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:29,490 INFO L93 Difference]: Finished difference Result 687 states and 690 transitions. [2020-11-07 06:42:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 06:42:29,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 629 [2020-11-07 06:42:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:29,494 INFO L225 Difference]: With dead ends: 687 [2020-11-07 06:42:29,494 INFO L226 Difference]: Without dead ends: 661 [2020-11-07 06:42:29,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:42:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-11-07 06:42:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 647. [2020-11-07 06:42:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-11-07 06:42:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 648 transitions. [2020-11-07 06:42:29,600 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 648 transitions. Word has length 629 [2020-11-07 06:42:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:29,601 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 648 transitions. [2020-11-07 06:42:29,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 06:42:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 648 transitions. [2020-11-07 06:42:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2020-11-07 06:42:29,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:29,610 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:29,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:42:29,610 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1558153022, now seen corresponding path program 19 times [2020-11-07 06:42:29,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:29,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315217113] [2020-11-07 06:42:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:30,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 95 proven. 3002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315217113] [2020-11-07 06:42:31,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:31,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:42:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667024535] [2020-11-07 06:42:31,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:42:31,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:42:31,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:42:31,094 INFO L87 Difference]: Start difference. First operand 647 states and 648 transitions. Second operand 24 states. [2020-11-07 06:42:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:36,134 INFO L93 Difference]: Finished difference Result 704 states and 707 transitions. [2020-11-07 06:42:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:42:36,135 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 646 [2020-11-07 06:42:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:36,140 INFO L225 Difference]: With dead ends: 704 [2020-11-07 06:42:36,140 INFO L226 Difference]: Without dead ends: 678 [2020-11-07 06:42:36,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:42:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-11-07 06:42:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 664. [2020-11-07 06:42:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-11-07 06:42:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 665 transitions. [2020-11-07 06:42:36,251 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 665 transitions. Word has length 646 [2020-11-07 06:42:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:36,252 INFO L481 AbstractCegarLoop]: Abstraction has 664 states and 665 transitions. [2020-11-07 06:42:36,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:42:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 665 transitions. [2020-11-07 06:42:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2020-11-07 06:42:36,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:36,261 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:36,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:42:36,261 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash 263317726, now seen corresponding path program 20 times [2020-11-07 06:42:36,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:36,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072096415] [2020-11-07 06:42:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:37,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 100 proven. 3330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:37,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072096415] [2020-11-07 06:42:37,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:37,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 06:42:37,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715965407] [2020-11-07 06:42:37,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 06:42:37,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:37,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 06:42:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:42:37,843 INFO L87 Difference]: Start difference. First operand 664 states and 665 transitions. Second operand 25 states. [2020-11-07 06:42:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:43,349 INFO L93 Difference]: Finished difference Result 721 states and 724 transitions. [2020-11-07 06:42:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 06:42:43,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 663 [2020-11-07 06:42:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:43,358 INFO L225 Difference]: With dead ends: 721 [2020-11-07 06:42:43,359 INFO L226 Difference]: Without dead ends: 695 [2020-11-07 06:42:43,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:42:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-11-07 06:42:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 681. [2020-11-07 06:42:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-11-07 06:42:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 682 transitions. [2020-11-07 06:42:43,495 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 682 transitions. Word has length 663 [2020-11-07 06:42:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:43,496 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 682 transitions. [2020-11-07 06:42:43,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 06:42:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 682 transitions. [2020-11-07 06:42:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-11-07 06:42:43,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:43,504 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:43,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:42:43,504 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1977404350, now seen corresponding path program 21 times [2020-11-07 06:42:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:43,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175412839] [2020-11-07 06:42:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:44,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 105 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:45,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175412839] [2020-11-07 06:42:45,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:45,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:42:45,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183967601] [2020-11-07 06:42:45,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:42:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:42:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:42:45,131 INFO L87 Difference]: Start difference. First operand 681 states and 682 transitions. Second operand 26 states. [2020-11-07 06:42:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:50,989 INFO L93 Difference]: Finished difference Result 738 states and 741 transitions. [2020-11-07 06:42:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 06:42:50,990 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 680 [2020-11-07 06:42:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:50,993 INFO L225 Difference]: With dead ends: 738 [2020-11-07 06:42:50,993 INFO L226 Difference]: Without dead ends: 712 [2020-11-07 06:42:50,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 06:42:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-11-07 06:42:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 698. [2020-11-07 06:42:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-11-07 06:42:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 699 transitions. [2020-11-07 06:42:51,103 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 699 transitions. Word has length 680 [2020-11-07 06:42:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:51,104 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 699 transitions. [2020-11-07 06:42:51,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:42:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 699 transitions. [2020-11-07 06:42:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2020-11-07 06:42:51,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:51,112 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:51,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:42:51,113 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1509057186, now seen corresponding path program 22 times [2020-11-07 06:42:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:51,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856075041] [2020-11-07 06:42:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:52,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 110 proven. 4037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856075041] [2020-11-07 06:42:52,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:52,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 06:42:52,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840876866] [2020-11-07 06:42:52,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 06:42:52,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:52,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 06:42:52,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:42:52,768 INFO L87 Difference]: Start difference. First operand 698 states and 699 transitions. Second operand 27 states. [2020-11-07 06:42:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:59,054 INFO L93 Difference]: Finished difference Result 755 states and 758 transitions. [2020-11-07 06:42:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:42:59,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 697 [2020-11-07 06:42:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:59,061 INFO L225 Difference]: With dead ends: 755 [2020-11-07 06:42:59,061 INFO L226 Difference]: Without dead ends: 729 [2020-11-07 06:42:59,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:42:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-11-07 06:42:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 715. [2020-11-07 06:42:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2020-11-07 06:42:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 716 transitions. [2020-11-07 06:42:59,198 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 716 transitions. Word has length 697 [2020-11-07 06:42:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:59,200 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 716 transitions. [2020-11-07 06:42:59,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 06:42:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 716 transitions. [2020-11-07 06:42:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2020-11-07 06:42:59,208 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:59,209 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:59,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:42:59,209 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -250146878, now seen corresponding path program 23 times [2020-11-07 06:42:59,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:59,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17597743] [2020-11-07 06:42:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:00,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 115 proven. 4416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:01,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17597743] [2020-11-07 06:43:01,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:01,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:43:01,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526126513] [2020-11-07 06:43:01,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:43:01,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:01,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:43:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:43:01,190 INFO L87 Difference]: Start difference. First operand 715 states and 716 transitions. Second operand 28 states. [2020-11-07 06:43:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:08,104 INFO L93 Difference]: Finished difference Result 772 states and 775 transitions. [2020-11-07 06:43:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 06:43:08,107 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 714 [2020-11-07 06:43:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:08,111 INFO L225 Difference]: With dead ends: 772 [2020-11-07 06:43:08,111 INFO L226 Difference]: Without dead ends: 746 [2020-11-07 06:43:08,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:43:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-11-07 06:43:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 732. [2020-11-07 06:43:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-11-07 06:43:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 733 transitions. [2020-11-07 06:43:08,217 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 733 transitions. Word has length 714 [2020-11-07 06:43:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:08,218 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 733 transitions. [2020-11-07 06:43:08,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:43:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 733 transitions. [2020-11-07 06:43:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2020-11-07 06:43:08,226 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:08,226 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:08,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:43:08,227 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1193528866, now seen corresponding path program 24 times [2020-11-07 06:43:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:08,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626026809] [2020-11-07 06:43:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:09,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 120 proven. 4812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:10,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626026809] [2020-11-07 06:43:10,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:10,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 06:43:10,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658074151] [2020-11-07 06:43:10,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 06:43:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 06:43:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:43:10,099 INFO L87 Difference]: Start difference. First operand 732 states and 733 transitions. Second operand 29 states. [2020-11-07 06:43:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:17,453 INFO L93 Difference]: Finished difference Result 789 states and 792 transitions. [2020-11-07 06:43:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 06:43:17,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 731 [2020-11-07 06:43:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:17,457 INFO L225 Difference]: With dead ends: 789 [2020-11-07 06:43:17,457 INFO L226 Difference]: Without dead ends: 763 [2020-11-07 06:43:17,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:43:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-11-07 06:43:17,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 749. [2020-11-07 06:43:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-11-07 06:43:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 750 transitions. [2020-11-07 06:43:17,593 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 750 transitions. Word has length 731 [2020-11-07 06:43:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:17,594 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 750 transitions. [2020-11-07 06:43:17,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 06:43:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 750 transitions. [2020-11-07 06:43:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2020-11-07 06:43:17,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:17,603 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:17,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:43:17,604 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1280046270, now seen corresponding path program 25 times [2020-11-07 06:43:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:17,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520320629] [2020-11-07 06:43:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:19,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5350 backedges. 125 proven. 5225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:19,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520320629] [2020-11-07 06:43:19,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:19,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:43:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546233612] [2020-11-07 06:43:19,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:43:19,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:43:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:43:19,729 INFO L87 Difference]: Start difference. First operand 749 states and 750 transitions. Second operand 30 states. [2020-11-07 06:43:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:27,753 INFO L93 Difference]: Finished difference Result 806 states and 809 transitions. [2020-11-07 06:43:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 06:43:27,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 748 [2020-11-07 06:43:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:27,759 INFO L225 Difference]: With dead ends: 806 [2020-11-07 06:43:27,759 INFO L226 Difference]: Without dead ends: 780 [2020-11-07 06:43:27,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 06:43:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-11-07 06:43:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 766. [2020-11-07 06:43:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-11-07 06:43:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 767 transitions. [2020-11-07 06:43:27,871 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 767 transitions. Word has length 748 [2020-11-07 06:43:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:27,872 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 767 transitions. [2020-11-07 06:43:27,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:43:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 767 transitions. [2020-11-07 06:43:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-11-07 06:43:27,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:27,879 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:27,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:43:27,880 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1399170654, now seen corresponding path program 26 times [2020-11-07 06:43:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:27,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87065955] [2020-11-07 06:43:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:29,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5785 backedges. 130 proven. 5655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:30,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87065955] [2020-11-07 06:43:30,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:30,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 06:43:30,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990161543] [2020-11-07 06:43:30,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 06:43:30,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 06:43:30,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:43:30,057 INFO L87 Difference]: Start difference. First operand 766 states and 767 transitions. Second operand 31 states. [2020-11-07 06:43:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:38,712 INFO L93 Difference]: Finished difference Result 823 states and 826 transitions. [2020-11-07 06:43:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 06:43:38,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 765 [2020-11-07 06:43:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:38,717 INFO L225 Difference]: With dead ends: 823 [2020-11-07 06:43:38,718 INFO L226 Difference]: Without dead ends: 797 [2020-11-07 06:43:38,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:43:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-11-07 06:43:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 783. [2020-11-07 06:43:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2020-11-07 06:43:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 784 transitions. [2020-11-07 06:43:38,865 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 784 transitions. Word has length 765 [2020-11-07 06:43:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:38,866 INFO L481 AbstractCegarLoop]: Abstraction has 783 states and 784 transitions. [2020-11-07 06:43:38,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 06:43:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 784 transitions. [2020-11-07 06:43:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2020-11-07 06:43:38,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:38,876 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:38,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:43:38,876 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1078843710, now seen corresponding path program 27 times [2020-11-07 06:43:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706414259] [2020-11-07 06:43:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:40,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6237 backedges. 135 proven. 6102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:41,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706414259] [2020-11-07 06:43:41,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:41,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:43:41,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915243043] [2020-11-07 06:43:41,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:43:41,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:41,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:43:41,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:43:41,253 INFO L87 Difference]: Start difference. First operand 783 states and 784 transitions. Second operand 32 states. [2020-11-07 06:43:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:50,516 INFO L93 Difference]: Finished difference Result 840 states and 843 transitions. [2020-11-07 06:43:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 06:43:50,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 782 [2020-11-07 06:43:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:50,522 INFO L225 Difference]: With dead ends: 840 [2020-11-07 06:43:50,523 INFO L226 Difference]: Without dead ends: 814 [2020-11-07 06:43:50,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 06:43:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-11-07 06:43:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 800. [2020-11-07 06:43:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-11-07 06:43:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 801 transitions. [2020-11-07 06:43:50,691 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 801 transitions. Word has length 782 [2020-11-07 06:43:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:50,692 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 801 transitions. [2020-11-07 06:43:50,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:43:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 801 transitions. [2020-11-07 06:43:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2020-11-07 06:43:50,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:50,699 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:50,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:43:50,700 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1359873314, now seen corresponding path program 28 times [2020-11-07 06:43:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:50,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110991070] [2020-11-07 06:43:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:52,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6706 backedges. 140 proven. 6566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:53,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110991070] [2020-11-07 06:43:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:53,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 06:43:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582400150] [2020-11-07 06:43:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 06:43:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 06:43:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:43:53,022 INFO L87 Difference]: Start difference. First operand 800 states and 801 transitions. Second operand 33 states. [2020-11-07 06:44:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:03,088 INFO L93 Difference]: Finished difference Result 857 states and 860 transitions. [2020-11-07 06:44:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:44:03,089 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 799 [2020-11-07 06:44:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:03,094 INFO L225 Difference]: With dead ends: 857 [2020-11-07 06:44:03,094 INFO L226 Difference]: Without dead ends: 831 [2020-11-07 06:44:03,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:44:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-11-07 06:44:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 817. [2020-11-07 06:44:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-11-07 06:44:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 818 transitions. [2020-11-07 06:44:03,216 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 818 transitions. Word has length 799 [2020-11-07 06:44:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:03,217 INFO L481 AbstractCegarLoop]: Abstraction has 817 states and 818 transitions. [2020-11-07 06:44:03,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 06:44:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 818 transitions. [2020-11-07 06:44:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2020-11-07 06:44:03,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:03,224 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:03,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:44:03,225 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:03,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1798741438, now seen corresponding path program 29 times [2020-11-07 06:44:03,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:03,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428019499] [2020-11-07 06:44:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:05,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 145 proven. 7047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:06,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428019499] [2020-11-07 06:44:06,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:06,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-11-07 06:44:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733851153] [2020-11-07 06:44:06,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 06:44:06,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:06,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 06:44:06,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:44:06,029 INFO L87 Difference]: Start difference. First operand 817 states and 818 transitions. Second operand 34 states. [2020-11-07 06:44:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:16,554 INFO L93 Difference]: Finished difference Result 874 states and 877 transitions. [2020-11-07 06:44:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 06:44:16,556 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 816 [2020-11-07 06:44:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:16,559 INFO L225 Difference]: With dead ends: 874 [2020-11-07 06:44:16,559 INFO L226 Difference]: Without dead ends: 848 [2020-11-07 06:44:16,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:44:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-11-07 06:44:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 834. [2020-11-07 06:44:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-11-07 06:44:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 835 transitions. [2020-11-07 06:44:16,710 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 835 transitions. Word has length 816 [2020-11-07 06:44:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:16,711 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 835 transitions. [2020-11-07 06:44:16,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 06:44:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 835 transitions. [2020-11-07 06:44:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-11-07 06:44:16,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:16,717 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:16,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:44:16,718 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1295437986, now seen corresponding path program 30 times [2020-11-07 06:44:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:16,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803525992] [2020-11-07 06:44:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:19,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 150 proven. 7545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803525992] [2020-11-07 06:44:19,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:19,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 06:44:19,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860871224] [2020-11-07 06:44:19,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 06:44:19,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 06:44:19,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:44:19,802 INFO L87 Difference]: Start difference. First operand 834 states and 835 transitions. Second operand 35 states. [2020-11-07 06:44:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:31,199 INFO L93 Difference]: Finished difference Result 891 states and 894 transitions. [2020-11-07 06:44:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 06:44:31,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 833 [2020-11-07 06:44:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:31,206 INFO L225 Difference]: With dead ends: 891 [2020-11-07 06:44:31,206 INFO L226 Difference]: Without dead ends: 865 [2020-11-07 06:44:31,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 06:44:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-11-07 06:44:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 851. [2020-11-07 06:44:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2020-11-07 06:44:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 852 transitions. [2020-11-07 06:44:31,334 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 852 transitions. Word has length 833 [2020-11-07 06:44:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:31,334 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 852 transitions. [2020-11-07 06:44:31,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 06:44:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 852 transitions. [2020-11-07 06:44:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2020-11-07 06:44:31,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:31,341 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:31,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:44:31,342 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:31,342 INFO L82 PathProgramCache]: Analyzing trace with hash -994984510, now seen corresponding path program 31 times [2020-11-07 06:44:31,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:31,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075020115] [2020-11-07 06:44:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8215 backedges. 155 proven. 8060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:34,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075020115] [2020-11-07 06:44:34,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:34,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:44:34,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729158991] [2020-11-07 06:44:34,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:44:34,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:34,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:44:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:44:34,323 INFO L87 Difference]: Start difference. First operand 851 states and 852 transitions. Second operand 36 states. [2020-11-07 06:44:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:46,974 INFO L93 Difference]: Finished difference Result 908 states and 911 transitions. [2020-11-07 06:44:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 06:44:46,976 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 850 [2020-11-07 06:44:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:46,980 INFO L225 Difference]: With dead ends: 908 [2020-11-07 06:44:46,980 INFO L226 Difference]: Without dead ends: 882 [2020-11-07 06:44:46,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 06:44:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-11-07 06:44:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 868. [2020-11-07 06:44:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2020-11-07 06:44:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 869 transitions. [2020-11-07 06:44:47,156 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 869 transitions. Word has length 850 [2020-11-07 06:44:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:47,158 INFO L481 AbstractCegarLoop]: Abstraction has 868 states and 869 transitions. [2020-11-07 06:44:47,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:44:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 869 transitions. [2020-11-07 06:44:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2020-11-07 06:44:47,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:47,166 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:47,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:44:47,166 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1949516766, now seen corresponding path program 32 times [2020-11-07 06:44:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:47,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922888606] [2020-11-07 06:44:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:49,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8752 backedges. 160 proven. 8592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:50,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922888606] [2020-11-07 06:44:50,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:50,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 06:44:50,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972660967] [2020-11-07 06:44:50,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 06:44:50,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:50,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 06:44:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:44:50,365 INFO L87 Difference]: Start difference. First operand 868 states and 869 transitions. Second operand 37 states. [2020-11-07 06:45:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:04,065 INFO L93 Difference]: Finished difference Result 925 states and 928 transitions. [2020-11-07 06:45:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-07 06:45:04,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 867 [2020-11-07 06:45:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:04,072 INFO L225 Difference]: With dead ends: 925 [2020-11-07 06:45:04,072 INFO L226 Difference]: Without dead ends: 899 [2020-11-07 06:45:04,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:45:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-11-07 06:45:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 885. [2020-11-07 06:45:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2020-11-07 06:45:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 886 transitions. [2020-11-07 06:45:04,221 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 886 transitions. Word has length 867 [2020-11-07 06:45:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:04,222 INFO L481 AbstractCegarLoop]: Abstraction has 885 states and 886 transitions. [2020-11-07 06:45:04,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 06:45:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 886 transitions. [2020-11-07 06:45:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-11-07 06:45:04,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:04,234 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:04,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:45:04,234 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1931688258, now seen corresponding path program 33 times [2020-11-07 06:45:04,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:04,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768094007] [2020-11-07 06:45:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:06,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9306 backedges. 165 proven. 9141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:07,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768094007] [2020-11-07 06:45:07,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:07,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-11-07 06:45:07,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765046594] [2020-11-07 06:45:07,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 06:45:07,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 06:45:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:45:07,732 INFO L87 Difference]: Start difference. First operand 885 states and 886 transitions. Second operand 38 states. [2020-11-07 06:45:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:22,281 INFO L93 Difference]: Finished difference Result 942 states and 945 transitions. [2020-11-07 06:45:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 06:45:22,282 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 884 [2020-11-07 06:45:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:22,287 INFO L225 Difference]: With dead ends: 942 [2020-11-07 06:45:22,287 INFO L226 Difference]: Without dead ends: 916 [2020-11-07 06:45:22,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 06:45:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-11-07 06:45:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 902. [2020-11-07 06:45:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-11-07 06:45:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 903 transitions. [2020-11-07 06:45:22,478 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 903 transitions. Word has length 884 [2020-11-07 06:45:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:22,479 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 903 transitions. [2020-11-07 06:45:22,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 06:45:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 903 transitions. [2020-11-07 06:45:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2020-11-07 06:45:22,486 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:22,487 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:22,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:45:22,487 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:22,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1233635234, now seen corresponding path program 34 times [2020-11-07 06:45:22,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:22,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670599208] [2020-11-07 06:45:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:25,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9877 backedges. 170 proven. 9707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:26,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670599208] [2020-11-07 06:45:26,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:26,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 06:45:26,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572463032] [2020-11-07 06:45:26,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 06:45:26,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 06:45:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:45:26,199 INFO L87 Difference]: Start difference. First operand 902 states and 903 transitions. Second operand 39 states. [2020-11-07 06:45:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:42,895 INFO L93 Difference]: Finished difference Result 959 states and 962 transitions. [2020-11-07 06:45:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:45:42,897 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 901 [2020-11-07 06:45:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:42,902 INFO L225 Difference]: With dead ends: 959 [2020-11-07 06:45:42,902 INFO L226 Difference]: Without dead ends: 933 [2020-11-07 06:45:42,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:45:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-11-07 06:45:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 919. [2020-11-07 06:45:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-11-07 06:45:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 920 transitions. [2020-11-07 06:45:43,105 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 920 transitions. Word has length 901 [2020-11-07 06:45:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:43,105 INFO L481 AbstractCegarLoop]: Abstraction has 919 states and 920 transitions. [2020-11-07 06:45:43,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 06:45:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 920 transitions. [2020-11-07 06:45:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2020-11-07 06:45:43,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:43,113 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:43,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:45:43,114 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -707406654, now seen corresponding path program 35 times [2020-11-07 06:45:43,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:43,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392920056] [2020-11-07 06:45:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:46,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 175 proven. 10290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:47,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392920056] [2020-11-07 06:45:47,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:47,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:45:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139511093] [2020-11-07 06:45:47,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:45:47,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:45:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:45:47,079 INFO L87 Difference]: Start difference. First operand 919 states and 920 transitions. Second operand 40 states. [2020-11-07 06:46:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:06,230 INFO L93 Difference]: Finished difference Result 976 states and 979 transitions. [2020-11-07 06:46:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-07 06:46:06,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 918 [2020-11-07 06:46:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:06,237 INFO L225 Difference]: With dead ends: 976 [2020-11-07 06:46:06,237 INFO L226 Difference]: Without dead ends: 950 [2020-11-07 06:46:06,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 06:46:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-11-07 06:46:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 936. [2020-11-07 06:46:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-11-07 06:46:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 937 transitions. [2020-11-07 06:46:06,403 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 937 transitions. Word has length 918 [2020-11-07 06:46:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:06,404 INFO L481 AbstractCegarLoop]: Abstraction has 936 states and 937 transitions. [2020-11-07 06:46:06,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:46:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 937 transitions. [2020-11-07 06:46:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2020-11-07 06:46:06,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:06,417 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:06,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:46:06,417 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1793068254, now seen corresponding path program 36 times [2020-11-07 06:46:06,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243104947] [2020-11-07 06:46:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:09,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11070 backedges. 180 proven. 10890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:46:10,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243104947] [2020-11-07 06:46:10,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:10,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 06:46:10,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221917599] [2020-11-07 06:46:10,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 06:46:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 06:46:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:46:10,628 INFO L87 Difference]: Start difference. First operand 936 states and 937 transitions. Second operand 41 states. [2020-11-07 06:46:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:31,185 INFO L93 Difference]: Finished difference Result 993 states and 996 transitions. [2020-11-07 06:46:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 06:46:31,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 935 [2020-11-07 06:46:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:31,193 INFO L225 Difference]: With dead ends: 993 [2020-11-07 06:46:31,193 INFO L226 Difference]: Without dead ends: 967 [2020-11-07 06:46:31,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:46:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-11-07 06:46:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 953. [2020-11-07 06:46:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-11-07 06:46:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 954 transitions. [2020-11-07 06:46:31,373 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 954 transitions. Word has length 935 [2020-11-07 06:46:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:31,374 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 954 transitions. [2020-11-07 06:46:31,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 06:46:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 954 transitions. [2020-11-07 06:46:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2020-11-07 06:46:31,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:31,383 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:31,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:46:31,383 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1266577342, now seen corresponding path program 37 times [2020-11-07 06:46:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:31,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224704560] [2020-11-07 06:46:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11692 backedges. 185 proven. 11507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:46:35,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224704560] [2020-11-07 06:46:35,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:35,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-11-07 06:46:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954087130] [2020-11-07 06:46:35,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 06:46:35,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 06:46:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:46:35,924 INFO L87 Difference]: Start difference. First operand 953 states and 954 transitions. Second operand 42 states. [2020-11-07 06:46:36,242 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 06:47:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:00,064 INFO L93 Difference]: Finished difference Result 1010 states and 1013 transitions. [2020-11-07 06:47:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 06:47:00,067 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 952 [2020-11-07 06:47:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:00,072 INFO L225 Difference]: With dead ends: 1010 [2020-11-07 06:47:00,072 INFO L226 Difference]: Without dead ends: 984 [2020-11-07 06:47:00,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 06:47:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-11-07 06:47:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2020-11-07 06:47:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-11-07 06:47:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 971 transitions. [2020-11-07 06:47:00,259 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 971 transitions. Word has length 952 [2020-11-07 06:47:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:00,260 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 971 transitions. [2020-11-07 06:47:00,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 06:47:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 971 transitions. [2020-11-07 06:47:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2020-11-07 06:47:00,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:00,269 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:00,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:47:00,269 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 817021278, now seen corresponding path program 38 times [2020-11-07 06:47:00,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:00,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506528621] [2020-11-07 06:47:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:04,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12331 backedges. 190 proven. 12141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:47:05,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506528621] [2020-11-07 06:47:05,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:05,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 06:47:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016264701] [2020-11-07 06:47:05,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 06:47:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 06:47:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:47:05,473 INFO L87 Difference]: Start difference. First operand 970 states and 971 transitions. Second operand 43 states. [2020-11-07 06:47:05,822 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 06:47:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:32,461 INFO L93 Difference]: Finished difference Result 1027 states and 1030 transitions. [2020-11-07 06:47:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-07 06:47:32,464 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 969 [2020-11-07 06:47:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:32,469 INFO L225 Difference]: With dead ends: 1027 [2020-11-07 06:47:32,469 INFO L226 Difference]: Without dead ends: 1001 [2020-11-07 06:47:32,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 06:47:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-11-07 06:47:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 987. [2020-11-07 06:47:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987 states. [2020-11-07 06:47:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 988 transitions. [2020-11-07 06:47:32,758 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 988 transitions. Word has length 969 [2020-11-07 06:47:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:32,759 INFO L481 AbstractCegarLoop]: Abstraction has 987 states and 988 transitions. [2020-11-07 06:47:32,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 06:47:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 988 transitions. [2020-11-07 06:47:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 987 [2020-11-07 06:47:32,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:32,768 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:32,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:47:32,769 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:32,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:32,770 INFO L82 PathProgramCache]: Analyzing trace with hash -388076606, now seen corresponding path program 39 times [2020-11-07 06:47:32,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:32,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836534279] [2020-11-07 06:47:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:36,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 195 proven. 12792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:47:37,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836534279] [2020-11-07 06:47:37,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:37,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:47:37,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959621020] [2020-11-07 06:47:37,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:47:37,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:47:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:47:37,663 INFO L87 Difference]: Start difference. First operand 987 states and 988 transitions. Second operand 44 states. [2020-11-07 06:47:38,026 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 06:48:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:48:07,125 INFO L93 Difference]: Finished difference Result 1044 states and 1047 transitions. [2020-11-07 06:48:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 06:48:07,127 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 986 [2020-11-07 06:48:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:48:07,133 INFO L225 Difference]: With dead ends: 1044 [2020-11-07 06:48:07,133 INFO L226 Difference]: Without dead ends: 1018 [2020-11-07 06:48:07,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 06:48:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-11-07 06:48:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 1004. [2020-11-07 06:48:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-11-07 06:48:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1005 transitions. [2020-11-07 06:48:07,338 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1005 transitions. Word has length 986 [2020-11-07 06:48:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:48:07,339 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1005 transitions. [2020-11-07 06:48:07,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:48:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1005 transitions. [2020-11-07 06:48:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2020-11-07 06:48:07,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:48:07,349 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:48:07,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:48:07,349 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:48:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:48:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash -717728290, now seen corresponding path program 40 times [2020-11-07 06:48:07,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:48:07,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521170910] [2020-11-07 06:48:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:48:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:48:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 200 proven. 13460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:48:13,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521170910] [2020-11-07 06:48:13,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:48:13,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 06:48:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215015908] [2020-11-07 06:48:13,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 06:48:13,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:48:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 06:48:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:48:13,529 INFO L87 Difference]: Start difference. First operand 1004 states and 1005 transitions. Second operand 45 states. [2020-11-07 06:48:13,986 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 06:48:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:48:46,570 INFO L93 Difference]: Finished difference Result 1061 states and 1064 transitions. [2020-11-07 06:48:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 06:48:46,573 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 1003 [2020-11-07 06:48:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:48:46,579 INFO L225 Difference]: With dead ends: 1061 [2020-11-07 06:48:46,579 INFO L226 Difference]: Without dead ends: 1035 [2020-11-07 06:48:46,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 06:48:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-11-07 06:48:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1021. [2020-11-07 06:48:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1021 states. [2020-11-07 06:48:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1022 transitions. [2020-11-07 06:48:46,811 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1022 transitions. Word has length 1003 [2020-11-07 06:48:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:48:46,812 INFO L481 AbstractCegarLoop]: Abstraction has 1021 states and 1022 transitions. [2020-11-07 06:48:46,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 06:48:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1022 transitions. [2020-11-07 06:48:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2020-11-07 06:48:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:48:46,821 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:48:46,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:48:46,821 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:48:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:48:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -559651006, now seen corresponding path program 41 times [2020-11-07 06:48:46,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:48:46,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275200594] [2020-11-07 06:48:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:48:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:51,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:48:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14350 backedges. 205 proven. 14145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:48:52,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275200594] [2020-11-07 06:48:52,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:48:52,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:48:52,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482734839] [2020-11-07 06:48:52,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:48:52,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:48:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:48:52,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:48:52,457 INFO L87 Difference]: Start difference. First operand 1021 states and 1022 transitions. Second operand 46 states. [2020-11-07 06:48:52,834 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 06:49:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:18,783 INFO L93 Difference]: Finished difference Result 1078 states and 1081 transitions. [2020-11-07 06:49:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-07 06:49:18,785 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 1020 [2020-11-07 06:49:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:18,791 INFO L225 Difference]: With dead ends: 1078 [2020-11-07 06:49:18,791 INFO L226 Difference]: Without dead ends: 1052 [2020-11-07 06:49:18,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 06:49:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-11-07 06:49:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1038. [2020-11-07 06:49:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2020-11-07 06:49:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1039 transitions. [2020-11-07 06:49:19,000 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1039 transitions. Word has length 1020 [2020-11-07 06:49:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:19,001 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1039 transitions. [2020-11-07 06:49:19,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:49:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1039 transitions. [2020-11-07 06:49:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2020-11-07 06:49:19,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:19,012 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:49:19,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:49:19,013 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash -742864290, now seen corresponding path program 42 times [2020-11-07 06:49:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:19,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996950068] [2020-11-07 06:49:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:24,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15057 backedges. 543 proven. 14514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:27,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996950068] [2020-11-07 06:49:27,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:27,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-11-07 06:49:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314568261] [2020-11-07 06:49:27,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 06:49:27,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 06:49:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:49:27,471 INFO L87 Difference]: Start difference. First operand 1038 states and 1039 transitions. Second operand 50 states. [2020-11-07 06:49:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:57,161 INFO L93 Difference]: Finished difference Result 1047 states and 1048 transitions. [2020-11-07 06:49:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 06:49:57,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 1037 [2020-11-07 06:49:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:57,163 INFO L225 Difference]: With dead ends: 1047 [2020-11-07 06:49:57,163 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:49:57,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=166, Invalid=2590, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:49:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:49:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:49:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:49:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:49:57,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1037 [2020-11-07 06:49:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:57,168 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:49:57,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 06:49:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:49:57,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:49:57,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:49:57,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:49:57,819 WARN L194 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-11-07 06:50:04,257 WARN L194 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 318 DAG size of output: 315 [2020-11-07 06:50:04,439 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-11-07 06:50:04,955 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-11-07 06:50:10,545 WARN L194 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 322 DAG size of output: 318 [2020-11-07 06:50:12,265 WARN L194 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 321 DAG size of output: 230 [2020-11-07 06:50:12,415 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-11-07 06:50:13,959 WARN L194 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 319 DAG size of output: 230 [2020-11-07 06:50:20,417 WARN L194 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2020-11-07 06:50:21,238 WARN L194 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:21,647 WARN L194 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:22,032 WARN L194 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:22,436 WARN L194 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:22,612 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:50:23,018 WARN L194 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:23,422 WARN L194 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:23,601 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:50:24,007 WARN L194 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:24,408 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:24,783 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:25,168 WARN L194 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:25,352 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-11-07 06:50:25,724 WARN L194 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:26,116 WARN L194 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:26,488 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:26,893 WARN L194 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:27,273 WARN L194 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:27,817 WARN L194 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:50:28,323 WARN L194 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:50:28,708 WARN L194 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:29,065 WARN L194 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:29,452 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:37,439 WARN L194 SmtUtils]: Spent 7.98 s on a formula simplification. DAG size of input: 318 DAG size of output: 228 [2020-11-07 06:50:58,722 WARN L194 SmtUtils]: Spent 21.27 s on a formula simplification. DAG size of input: 404 DAG size of output: 236 [2020-11-07 06:50:59,112 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:50:59,512 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:07,050 WARN L194 SmtUtils]: Spent 7.53 s on a formula simplification. DAG size of input: 309 DAG size of output: 223 [2020-11-07 06:51:07,460 WARN L194 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:07,862 WARN L194 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:08,248 WARN L194 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:08,637 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:09,038 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:09,451 WARN L194 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:09,839 WARN L194 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:10,223 WARN L194 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:10,631 WARN L194 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:11,005 WARN L194 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:11,366 WARN L194 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:11,747 WARN L194 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:12,146 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:12,534 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:12,927 WARN L194 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:13,327 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:13,714 WARN L194 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:14,082 WARN L194 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:14,406 WARN L194 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:14,803 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:15,217 WARN L194 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:15,623 WARN L194 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:16,015 WARN L194 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:16,402 WARN L194 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:16,800 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:17,198 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:17,750 WARN L194 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:51:18,156 WARN L194 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:18,543 WARN L194 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:19,072 WARN L194 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:51:19,466 WARN L194 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:19,863 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:27,524 WARN L194 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 317 DAG size of output: 231 [2020-11-07 06:51:27,912 WARN L194 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:28,311 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:28,703 WARN L194 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:29,237 WARN L194 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:51:29,645 WARN L194 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:30,012 WARN L194 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:30,357 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:30,749 WARN L194 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:31,164 WARN L194 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:31,562 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:31,968 WARN L194 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:32,378 WARN L194 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:32,777 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:33,174 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:33,583 WARN L194 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:34,130 WARN L194 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:51:34,674 WARN L194 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:51:35,082 WARN L194 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:58,765 WARN L194 SmtUtils]: Spent 23.68 s on a formula simplification. DAG size of input: 407 DAG size of output: 236 [2020-11-07 06:51:59,162 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:59,563 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:51:59,965 WARN L194 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:00,362 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:00,763 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:01,174 WARN L194 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:01,371 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-11-07 06:52:01,769 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:02,164 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:02,562 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:02,956 WARN L194 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:03,350 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:03,765 WARN L194 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:04,160 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:04,549 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:05,093 WARN L194 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:52:05,492 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:06,028 WARN L194 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:52:06,438 WARN L194 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:06,842 WARN L194 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:15,731 WARN L194 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 319 DAG size of output: 233 [2020-11-07 06:52:15,929 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-11-07 06:52:16,126 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:52:16,304 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:52:16,518 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:52:16,711 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:52:17,146 WARN L194 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 16 [2020-11-07 06:52:17,575 WARN L194 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 16 [2020-11-07 06:52:25,714 WARN L194 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 309 DAG size of output: 223 [2020-11-07 06:52:26,255 WARN L194 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:52:26,689 WARN L194 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 16 [2020-11-07 06:52:27,248 WARN L194 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:52:35,481 WARN L194 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 324 DAG size of output: 238 [2020-11-07 06:52:43,518 WARN L194 SmtUtils]: Spent 8.03 s on a formula simplification. DAG size of input: 313 DAG size of output: 227 [2020-11-07 06:52:43,916 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:52,493 WARN L194 SmtUtils]: Spent 8.57 s on a formula simplification. DAG size of input: 319 DAG size of output: 233 [2020-11-07 06:52:59,439 WARN L194 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 322 DAG size of output: 236 [2020-11-07 06:52:59,787 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:52:59,948 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:53:00,302 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:00,662 WARN L194 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:01,010 WARN L194 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:01,323 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:01,691 WARN L194 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:02,034 WARN L194 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:02,378 WARN L194 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:02,728 WARN L194 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:03,076 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:03,417 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:03,761 WARN L194 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:04,108 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:04,450 WARN L194 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:04,795 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:05,149 WARN L194 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:05,620 WARN L194 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:06,082 WARN L194 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:06,229 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:53:06,550 WARN L194 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:06,868 WARN L194 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:07,207 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:13,738 WARN L194 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 318 DAG size of output: 228 [2020-11-07 06:53:13,899 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:53:14,232 WARN L194 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:20,591 WARN L194 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 313 DAG size of output: 227 [2020-11-07 06:53:20,750 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-11-07 06:53:21,086 WARN L194 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:21,434 WARN L194 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:21,761 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:22,086 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:22,432 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:22,757 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:23,063 WARN L194 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:23,384 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:23,696 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:24,019 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:24,358 WARN L194 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:24,671 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:24,980 WARN L194 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:25,440 WARN L194 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:25,773 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:26,240 WARN L194 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:26,577 WARN L194 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:32,438 WARN L194 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 317 DAG size of output: 231 [2020-11-07 06:53:32,758 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:33,055 WARN L194 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:33,360 WARN L194 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:33,668 WARN L194 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:33,979 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:34,285 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:34,593 WARN L194 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:34,904 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:35,208 WARN L194 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:35,526 WARN L194 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:35,839 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:36,155 WARN L194 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:36,463 WARN L194 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:36,774 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:37,097 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:37,412 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:37,735 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:38,083 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:38,391 WARN L194 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:38,720 WARN L194 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:39,045 WARN L194 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:39,360 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:39,683 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:40,011 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:40,342 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:40,681 WARN L194 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:41,026 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:41,499 WARN L194 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:41,976 WARN L194 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:42,316 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:42,650 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:42,976 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:43,302 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:43,633 WARN L194 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:43,964 WARN L194 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:44,287 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:44,622 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:44,963 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:45,302 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:45,615 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:45,931 WARN L194 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:46,237 WARN L194 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:46,550 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:46,863 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:47,170 WARN L194 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:47,484 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:47,802 WARN L194 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:48,119 WARN L194 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:48,434 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:48,761 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:49,090 WARN L194 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:49,419 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:49,752 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:50,079 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:50,406 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:50,739 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:51,075 WARN L194 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:51,386 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:51,705 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:52,020 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:52,356 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:52,815 WARN L194 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:53,156 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:53,486 WARN L194 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:53,925 WARN L194 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:53:54,245 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:54,575 WARN L194 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:54,908 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:55,228 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:55,547 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:55,867 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:56,188 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:56,524 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:56,859 WARN L194 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:57,197 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:57,539 WARN L194 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:57,879 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:58,214 WARN L194 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:58,535 WARN L194 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:58,881 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:59,209 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:59,546 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:53:59,865 WARN L194 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:00,254 WARN L194 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:00,592 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:00,916 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:01,241 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:01,564 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:01,885 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:02,207 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:02,552 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:02,892 WARN L194 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:03,232 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:03,551 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:03,862 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:04,283 WARN L194 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:54:04,739 WARN L194 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-11-07 06:54:05,083 WARN L194 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:05,396 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:05,719 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-11-07 06:54:11,732 WARN L194 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 318 DAG size of output: 228