/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:26:27,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:26:27,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:26:27,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:26:27,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:26:27,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:26:27,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:26:27,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:26:27,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:26:27,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:26:27,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:26:27,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:26:27,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:26:27,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:26:27,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:26:27,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:26:27,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:26:27,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:26:27,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:26:27,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:26:27,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:26:27,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:26:27,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:26:27,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:26:27,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:26:27,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:26:27,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:26:27,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:26:27,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:26:27,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:26:27,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:26:27,589 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:26:27,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:26:27,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:26:27,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:26:27,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:26:27,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:26:27,967 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:26:27,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2021-05-03 00:26:28,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c5d672db/cc21d5e5c52c4012a262cc64bf4eaf19/FLAG80856f1f4 [2021-05-03 00:26:28,529 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:26:28,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2021-05-03 00:26:28,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c5d672db/cc21d5e5c52c4012a262cc64bf4eaf19/FLAG80856f1f4 [2021-05-03 00:26:28,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c5d672db/cc21d5e5c52c4012a262cc64bf4eaf19 [2021-05-03 00:26:28,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:26:28,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:26:28,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:26:28,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:26:28,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:26:28,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:26:28" (1/1) ... [2021-05-03 00:26:28,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f79f65d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:28, skipping insertion in model container [2021-05-03 00:26:28,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:26:28" (1/1) ... [2021-05-03 00:26:28,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:26:28,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:26:29,117 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2021-05-03 00:26:29,120 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2021-05-03 00:26:29,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:26:29,129 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:26:29,147 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2021-05-03 00:26:29,149 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2021-05-03 00:26:29,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:26:29,164 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:26:29,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29 WrapperNode [2021-05-03 00:26:29,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:26:29,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:26:29,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:26:29,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:26:29,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (1/1) ... [2021-05-03 00:26:29,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:26:29,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:26:29,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:26:29,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:26:29,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (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 [2021-05-03 00:26:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:26:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:26:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:26:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:26:29,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:26:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:26:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:26:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-05-03 00:26:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:26:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:26:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:26:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:26:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:26:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:26:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:26:29,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:26:29,612 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:26:29,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:26:29 BoogieIcfgContainer [2021-05-03 00:26:29,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:26:29,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:26:29,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:26:29,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:26:29,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:26:28" (1/3) ... [2021-05-03 00:26:29,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cc11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:26:29, skipping insertion in model container [2021-05-03 00:26:29,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:26:29" (2/3) ... [2021-05-03 00:26:29,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cc11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:26:29, skipping insertion in model container [2021-05-03 00:26:29,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:26:29" (3/3) ... [2021-05-03 00:26:29,621 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2021-05-03 00:26:29,626 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:26:29,643 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-05-03 00:26:29,656 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-03 00:26:29,672 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:26:29,672 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:26:29,672 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:26:29,672 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:26:29,672 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:26:29,672 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:26:29,673 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:26:29,673 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:26:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-03 00:26:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 00:26:29,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:29,690 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:29,691 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2021-05-03 00:26:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:29,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282199085] [2021-05-03 00:26:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:29,752 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:30,062 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282199085] [2021-05-03 00:26:30,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [282199085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:30,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:30,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:26:30,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786377529] [2021-05-03 00:26:30,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:26:30,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:30,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:26:30,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:26:30,086 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:30,235 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-05-03 00:26:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:26:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-03 00:26:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:30,245 INFO L225 Difference]: With dead ends: 29 [2021-05-03 00:26:30,245 INFO L226 Difference]: Without dead ends: 15 [2021-05-03 00:26:30,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:26:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-03 00:26:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-03 00:26:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-03 00:26:30,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2021-05-03 00:26:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:30,293 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-03 00:26:30,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-03 00:26:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:26:30,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:30,294 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:30,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:26:30,295 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2021-05-03 00:26:30,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:30,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571271222] [2021-05-03 00:26:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:30,315 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:30,317 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:30,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:30,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571271222] [2021-05-03 00:26:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571271222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:30,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:30,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 00:26:30,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784895418] [2021-05-03 00:26:30,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 00:26:30,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:30,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 00:26:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:26:30,436 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:30,593 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-03 00:26:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:26:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:26:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:30,594 INFO L225 Difference]: With dead ends: 22 [2021-05-03 00:26:30,594 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:26:30,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:26:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:26:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-05-03 00:26:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-03 00:26:30,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2021-05-03 00:26:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:30,601 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-03 00:26:30,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-03 00:26:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:26:30,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:30,602 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:30,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:26:30,602 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1837062518, now seen corresponding path program 1 times [2021-05-03 00:26:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:30,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691380467] [2021-05-03 00:26:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:30,606 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:30,608 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:30,727 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:30,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691380467] [2021-05-03 00:26:30,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691380467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:30,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:30,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 00:26:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529933692] [2021-05-03 00:26:30,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 00:26:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 00:26:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:26:30,732 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:30,820 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-03 00:26:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:26:30,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:26:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:30,821 INFO L225 Difference]: With dead ends: 20 [2021-05-03 00:26:30,821 INFO L226 Difference]: Without dead ends: 16 [2021-05-03 00:26:30,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:26:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-03 00:26:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-03 00:26:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-03 00:26:30,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2021-05-03 00:26:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:30,826 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-03 00:26:30,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-03 00:26:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:26:30,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:30,827 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:30,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:26:30,827 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1837111337, now seen corresponding path program 2 times [2021-05-03 00:26:30,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:30,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412563543] [2021-05-03 00:26:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:30,831 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:30,832 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:30,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412563543] [2021-05-03 00:26:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [412563543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:30,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:30,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:26:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889483445] [2021-05-03 00:26:30,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:26:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:26:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:26:30,953 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:31,160 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-03 00:26:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:26:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:26:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:31,161 INFO L225 Difference]: With dead ends: 23 [2021-05-03 00:26:31,162 INFO L226 Difference]: Without dead ends: 21 [2021-05-03 00:26:31,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:26:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-03 00:26:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-03 00:26:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-03 00:26:31,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2021-05-03 00:26:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:31,177 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-03 00:26:31,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-03 00:26:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:26:31,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:31,179 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:31,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:26:31,179 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 2 times [2021-05-03 00:26:31,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:31,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293183423] [2021-05-03 00:26:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:31,187 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:31,189 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:31,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:31,294 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:31,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293183423] [2021-05-03 00:26:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293183423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:31,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:31,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:26:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713517883] [2021-05-03 00:26:31,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:26:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:26:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:26:31,297 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:31,410 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-03 00:26:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:26:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-03 00:26:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:31,411 INFO L225 Difference]: With dead ends: 21 [2021-05-03 00:26:31,411 INFO L226 Difference]: Without dead ends: 17 [2021-05-03 00:26:31,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:26:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-03 00:26:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-03 00:26:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-03 00:26:31,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2021-05-03 00:26:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:31,422 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-03 00:26:31,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-03 00:26:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:26:31,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:31,423 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:31,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:26:31,423 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1115928489, now seen corresponding path program 3 times [2021-05-03 00:26:31,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:31,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789358474] [2021-05-03 00:26:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:31,427 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:31,429 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:31,557 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789358474] [2021-05-03 00:26:31,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1789358474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:31,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:31,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 00:26:31,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204570520] [2021-05-03 00:26:31,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 00:26:31,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 00:26:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:26:31,560 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:31,777 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-03 00:26:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:26:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-03 00:26:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:31,780 INFO L225 Difference]: With dead ends: 24 [2021-05-03 00:26:31,780 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 00:26:31,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:26:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 00:26:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-05-03 00:26:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-03 00:26:31,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2021-05-03 00:26:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:31,791 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-03 00:26:31,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-03 00:26:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:26:31,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:31,792 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:31,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:26:31,792 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:31,792 INFO L82 PathProgramCache]: Analyzing trace with hash 234047862, now seen corresponding path program 3 times [2021-05-03 00:26:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:31,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269414735] [2021-05-03 00:26:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:31,799 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:31,800 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:31,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:31,919 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269414735] [2021-05-03 00:26:31,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [269414735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:31,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:31,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 00:26:31,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605422450] [2021-05-03 00:26:31,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 00:26:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 00:26:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:26:31,922 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:32,049 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-03 00:26:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:26:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:26:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:32,051 INFO L225 Difference]: With dead ends: 22 [2021-05-03 00:26:32,051 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 00:26:32,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:26:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 00:26:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 00:26:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-03 00:26:32,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2021-05-03 00:26:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:32,063 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-03 00:26:32,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-03 00:26:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:26:32,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:32,064 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:32,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 00:26:32,064 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash 234096681, now seen corresponding path program 4 times [2021-05-03 00:26:32,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:32,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302287393] [2021-05-03 00:26:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:32,069 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:32,070 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:32,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:32,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:32,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302287393] [2021-05-03 00:26:32,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [302287393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:32,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:32,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:26:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201215410] [2021-05-03 00:26:32,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:26:32,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:26:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 00:26:32,206 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:32,461 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-03 00:26:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:26:32,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:26:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:32,464 INFO L225 Difference]: With dead ends: 25 [2021-05-03 00:26:32,464 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 00:26:32,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:26:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 00:26:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-03 00:26:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-03 00:26:32,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-05-03 00:26:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:32,475 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-03 00:26:32,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-03 00:26:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 00:26:32,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:32,477 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:32,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:26:32,477 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1332934410, now seen corresponding path program 4 times [2021-05-03 00:26:32,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:32,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160715226] [2021-05-03 00:26:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:32,482 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:32,484 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:32,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:32,592 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:32,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160715226] [2021-05-03 00:26:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [160715226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:32,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:32,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:26:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144904282] [2021-05-03 00:26:32,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:26:32,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:32,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:26:32,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 00:26:32,595 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:32,750 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-03 00:26:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:26:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-03 00:26:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:32,751 INFO L225 Difference]: With dead ends: 23 [2021-05-03 00:26:32,751 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 00:26:32,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:26:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 00:26:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-03 00:26:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-03 00:26:32,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2021-05-03 00:26:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:32,756 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-03 00:26:32,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-03 00:26:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 00:26:32,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:32,756 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:32,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:26:32,757 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1332885591, now seen corresponding path program 5 times [2021-05-03 00:26:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:32,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793454612] [2021-05-03 00:26:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:32,760 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:32,767 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:32,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:32,856 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:32,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793454612] [2021-05-03 00:26:32,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [793454612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:32,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:32,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:26:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310741287] [2021-05-03 00:26:32,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:26:32,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:32,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:26:32,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:26:32,857 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:33,167 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-03 00:26:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:26:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-03 00:26:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:33,168 INFO L225 Difference]: With dead ends: 26 [2021-05-03 00:26:33,168 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:26:33,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:26:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:26:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-05-03 00:26:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-05-03 00:26:33,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2021-05-03 00:26:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:33,175 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-05-03 00:26:33,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-05-03 00:26:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:26:33,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:33,175 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:33,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 00:26:33,176 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1630222710, now seen corresponding path program 5 times [2021-05-03 00:26:33,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:33,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134530503] [2021-05-03 00:26:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:33,180 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:33,181 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:33,310 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134530503] [2021-05-03 00:26:33,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134530503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:33,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:33,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:26:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613009431] [2021-05-03 00:26:33,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:26:33,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:26:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:26:33,311 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:33,489 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-03 00:26:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:26:33,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:26:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:33,492 INFO L225 Difference]: With dead ends: 24 [2021-05-03 00:26:33,493 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:26:33,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:26:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:26:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:26:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-03 00:26:33,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2021-05-03 00:26:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:33,505 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-03 00:26:33,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-03 00:26:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:26:33,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:33,506 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:33,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 00:26:33,507 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:33,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1630271529, now seen corresponding path program 6 times [2021-05-03 00:26:33,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:33,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023587371] [2021-05-03 00:26:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:33,513 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:33,515 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:33,630 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:33,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023587371] [2021-05-03 00:26:33,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023587371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:33,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:33,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:26:33,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352834500] [2021-05-03 00:26:33,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:26:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:33,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:26:33,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:26:33,631 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:33,956 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-03 00:26:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:26:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:26:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:33,957 INFO L225 Difference]: With dead ends: 27 [2021-05-03 00:26:33,957 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:26:33,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:26:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:26:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-03 00:26:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-03 00:26:33,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2021-05-03 00:26:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:33,973 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-03 00:26:33,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-03 00:26:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:26:33,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:33,974 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:33,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:26:33,974 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:33,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 6 times [2021-05-03 00:26:33,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:33,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782501463] [2021-05-03 00:26:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:33,978 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:33,979 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:34,098 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782501463] [2021-05-03 00:26:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1782501463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:34,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:34,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:26:34,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773325854] [2021-05-03 00:26:34,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:26:34,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:26:34,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:26:34,099 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:34,285 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-03 00:26:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:26:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:26:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:34,286 INFO L225 Difference]: With dead ends: 25 [2021-05-03 00:26:34,286 INFO L226 Difference]: Without dead ends: 21 [2021-05-03 00:26:34,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:26:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-03 00:26:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-03 00:26:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-03 00:26:34,291 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2021-05-03 00:26:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:34,291 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-03 00:26:34,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-03 00:26:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:26:34,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:34,291 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:34,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 00:26:34,292 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1001138263, now seen corresponding path program 7 times [2021-05-03 00:26:34,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:34,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872037687] [2021-05-03 00:26:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:34,295 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:34,296 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:34,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:34,409 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:34,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872037687] [2021-05-03 00:26:34,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [872037687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:34,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:34,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:26:34,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461183430] [2021-05-03 00:26:34,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:26:34,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:26:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:26:34,411 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:34,816 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-03 00:26:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:26:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:26:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:34,817 INFO L225 Difference]: With dead ends: 28 [2021-05-03 00:26:34,817 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:26:34,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:26:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:26:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-05-03 00:26:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-03 00:26:34,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2021-05-03 00:26:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:34,822 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-03 00:26:34,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-03 00:26:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:26:34,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:34,823 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:34,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 00:26:34,823 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash -970512010, now seen corresponding path program 7 times [2021-05-03 00:26:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:34,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394546157] [2021-05-03 00:26:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:34,826 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:34,827 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:34,932 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:34,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394546157] [2021-05-03 00:26:34,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [394546157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:34,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:34,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:26:34,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684364338] [2021-05-03 00:26:34,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:26:34,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:26:34,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:26:34,933 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:35,159 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-03 00:26:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:26:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-03 00:26:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:35,161 INFO L225 Difference]: With dead ends: 26 [2021-05-03 00:26:35,161 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 00:26:35,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:26:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 00:26:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-03 00:26:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-03 00:26:35,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2021-05-03 00:26:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:35,165 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-03 00:26:35,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-03 00:26:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:26:35,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:35,165 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:35,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:26:35,166 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash -970463191, now seen corresponding path program 8 times [2021-05-03 00:26:35,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:35,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183243290] [2021-05-03 00:26:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:35,169 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:35,170 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:35,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:35,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183243290] [2021-05-03 00:26:35,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [183243290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:35,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:35,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:26:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632913501] [2021-05-03 00:26:35,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:26:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:26:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:26:35,309 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:35,801 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-03 00:26:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:26:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-03 00:26:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:35,803 INFO L225 Difference]: With dead ends: 29 [2021-05-03 00:26:35,803 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:26:35,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:26:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:26:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-05-03 00:26:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:35,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-03 00:26:35,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-05-03 00:26:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:35,813 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-03 00:26:35,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-03 00:26:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:26:35,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:35,814 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:35,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 00:26:35,814 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash -19584778, now seen corresponding path program 8 times [2021-05-03 00:26:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:35,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350509012] [2021-05-03 00:26:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:35,818 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:35,819 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:35,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:35,977 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:35,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350509012] [2021-05-03 00:26:35,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350509012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:35,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:35,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:26:35,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566485944] [2021-05-03 00:26:35,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:26:35,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:26:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:26:35,979 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:36,281 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-03 00:26:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:26:36,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-03 00:26:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:36,282 INFO L225 Difference]: With dead ends: 27 [2021-05-03 00:26:36,282 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 00:26:36,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:26:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 00:26:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-03 00:26:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-03 00:26:36,286 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2021-05-03 00:26:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:36,286 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-03 00:26:36,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-03 00:26:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:26:36,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:36,287 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:36,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 00:26:36,287 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -19535959, now seen corresponding path program 9 times [2021-05-03 00:26:36,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:36,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777056317] [2021-05-03 00:26:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:36,291 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:36,292 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:36,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:36,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:36,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777056317] [2021-05-03 00:26:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [777056317] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:36,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:26:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240895748] [2021-05-03 00:26:36,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:26:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:26:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:26:36,439 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:36,942 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-03 00:26:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:26:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-03 00:26:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:36,943 INFO L225 Difference]: With dead ends: 30 [2021-05-03 00:26:36,943 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:26:36,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:26:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:26:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-05-03 00:26:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-05-03 00:26:36,948 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2021-05-03 00:26:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:36,948 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-05-03 00:26:36,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-05-03 00:26:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:26:36,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:36,949 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:36,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:26:36,949 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash -605611658, now seen corresponding path program 9 times [2021-05-03 00:26:36,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:36,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329959686] [2021-05-03 00:26:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:36,952 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:36,953 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:37,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:37,078 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329959686] [2021-05-03 00:26:37,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [329959686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:37,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:37,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:26:37,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662531674] [2021-05-03 00:26:37,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:26:37,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:26:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:26:37,080 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:37,418 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-03 00:26:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:26:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:26:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:37,419 INFO L225 Difference]: With dead ends: 28 [2021-05-03 00:26:37,419 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:26:37,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:26:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:26:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 00:26:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-03 00:26:37,427 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2021-05-03 00:26:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:37,427 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-03 00:26:37,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-03 00:26:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:26:37,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:37,428 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:37,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 00:26:37,428 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:37,428 INFO L82 PathProgramCache]: Analyzing trace with hash -605562839, now seen corresponding path program 10 times [2021-05-03 00:26:37,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:37,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367556658] [2021-05-03 00:26:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:37,438 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:37,440 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:37,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:37,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:37,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367556658] [2021-05-03 00:26:37,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [367556658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:37,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:37,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:26:37,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690392509] [2021-05-03 00:26:37,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 00:26:37,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:37,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 00:26:37,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:26:37,599 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:38,180 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-03 00:26:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:26:38,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:26:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:38,181 INFO L225 Difference]: With dead ends: 31 [2021-05-03 00:26:38,181 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:26:38,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 587.3ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:26:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:26:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-05-03 00:26:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-03 00:26:38,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2021-05-03 00:26:38,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:38,186 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-03 00:26:38,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:38,186 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-03 00:26:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:26:38,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:38,187 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:38,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 00:26:38,187 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1592575754, now seen corresponding path program 10 times [2021-05-03 00:26:38,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:38,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623503249] [2021-05-03 00:26:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:38,190 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:38,191 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:38,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:38,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623503249] [2021-05-03 00:26:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623503249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:38,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:38,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:26:38,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123605747] [2021-05-03 00:26:38,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 00:26:38,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 00:26:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:26:38,322 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:38,674 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-03 00:26:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:26:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-03 00:26:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:38,674 INFO L225 Difference]: With dead ends: 29 [2021-05-03 00:26:38,675 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:26:38,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:26:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:26:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-03 00:26:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-03 00:26:38,681 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2021-05-03 00:26:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:38,681 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-03 00:26:38,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-03 00:26:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:26:38,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:38,682 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:38,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:26:38,682 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1592526935, now seen corresponding path program 11 times [2021-05-03 00:26:38,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:38,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263702205] [2021-05-03 00:26:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:38,685 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:38,686 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:38,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:38,838 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263702205] [2021-05-03 00:26:38,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [263702205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:38,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:38,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:26:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019727759] [2021-05-03 00:26:38,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:26:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:26:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:26:38,839 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:39,465 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-03 00:26:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:26:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-03 00:26:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:39,466 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:26:39,466 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:26:39,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 628.9ms TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:26:39,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:26:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-05-03 00:26:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-03 00:26:39,471 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-05-03 00:26:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:39,471 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-03 00:26:39,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-03 00:26:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:26:39,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:39,471 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:39,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 00:26:39,472 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2123691658, now seen corresponding path program 11 times [2021-05-03 00:26:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:39,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474622284] [2021-05-03 00:26:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:39,476 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:39,477 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:39,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:39,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474622284] [2021-05-03 00:26:39,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [474622284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:39,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:39,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:26:39,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675335254] [2021-05-03 00:26:39,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:26:39,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:26:39,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:26:39,645 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:40,019 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-03 00:26:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:26:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-03 00:26:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:40,020 INFO L225 Difference]: With dead ends: 30 [2021-05-03 00:26:40,020 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:26:40,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:26:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:26:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-03 00:26:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-03 00:26:40,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2021-05-03 00:26:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:40,033 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-03 00:26:40,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-03 00:26:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:26:40,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:40,034 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:40,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 00:26:40,034 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2123642839, now seen corresponding path program 12 times [2021-05-03 00:26:40,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:40,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523668329] [2021-05-03 00:26:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:40,037 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:40,038 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:40,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:40,206 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:40,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523668329] [2021-05-03 00:26:40,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [523668329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:40,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:40,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:26:40,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047625517] [2021-05-03 00:26:40,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:26:40,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:40,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:26:40,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:26:40,207 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:40,855 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-03 00:26:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:26:40,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-03 00:26:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:40,856 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:26:40,856 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 00:26:40,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:26:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 00:26:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-05-03 00:26:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-03 00:26:40,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2021-05-03 00:26:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:40,860 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-03 00:26:40,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-03 00:26:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:26:40,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:40,861 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:40,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:26:40,861 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1408415498, now seen corresponding path program 12 times [2021-05-03 00:26:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:40,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705777762] [2021-05-03 00:26:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:40,864 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:40,865 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:41,030 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705777762] [2021-05-03 00:26:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [705777762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:41,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:41,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:26:41,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000783775] [2021-05-03 00:26:41,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:26:41,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:41,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:26:41,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:26:41,033 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:41,423 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-03 00:26:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:26:41,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-03 00:26:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:41,424 INFO L225 Difference]: With dead ends: 31 [2021-05-03 00:26:41,424 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:26:41,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:26:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:26:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 00:26:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-03 00:26:41,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2021-05-03 00:26:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:41,429 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-03 00:26:41,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-03 00:26:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:26:41,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:41,429 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:41,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 00:26:41,429 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1408366679, now seen corresponding path program 13 times [2021-05-03 00:26:41,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:41,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207588097] [2021-05-03 00:26:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:41,433 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:41,433 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:41,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:41,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207588097] [2021-05-03 00:26:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207588097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:41,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:41,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:26:41,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116403856] [2021-05-03 00:26:41,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:26:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:26:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:26:41,615 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:42,330 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-03 00:26:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:26:42,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-03 00:26:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:42,331 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:26:42,331 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:26:42,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 751.1ms TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:26:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:26:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-05-03 00:26:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-03 00:26:42,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2021-05-03 00:26:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:42,336 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-03 00:26:42,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-03 00:26:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:26:42,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:42,336 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:42,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 00:26:42,337 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash -709691018, now seen corresponding path program 13 times [2021-05-03 00:26:42,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:42,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293881448] [2021-05-03 00:26:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:42,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:42,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:42,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:42,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293881448] [2021-05-03 00:26:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293881448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:42,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:42,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:26:42,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372397283] [2021-05-03 00:26:42,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:26:42,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:26:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:26:42,527 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:42,931 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-03 00:26:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:26:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:26:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:42,932 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:26:42,932 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:26:42,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:26:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:26:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 00:26:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-03 00:26:42,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2021-05-03 00:26:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:42,936 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-03 00:26:42,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-03 00:26:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:26:42,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:42,937 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:42,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:26:42,937 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -709642199, now seen corresponding path program 14 times [2021-05-03 00:26:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:42,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598415792] [2021-05-03 00:26:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:42,941 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:42,942 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:43,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:43,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:43,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598415792] [2021-05-03 00:26:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598415792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:43,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:43,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:26:43,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545155816] [2021-05-03 00:26:43,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:26:43,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:26:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:26:43,137 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:43,906 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-03 00:26:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:26:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:26:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:43,907 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:26:43,907 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:26:43,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 831.0ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:26:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:26:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-05-03 00:26:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-03 00:26:43,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2021-05-03 00:26:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:43,912 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-03 00:26:43,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-03 00:26:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:26:43,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:43,912 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:43,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 00:26:43,912 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 14 times [2021-05-03 00:26:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142283749] [2021-05-03 00:26:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:43,916 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:43,917 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:44,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:44,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:44,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142283749] [2021-05-03 00:26:44,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142283749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:44,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:44,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:26:44,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691135461] [2021-05-03 00:26:44,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:26:44,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:26:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:26:44,122 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:44,593 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-03 00:26:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:26:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-03 00:26:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:44,609 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:26:44,610 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:26:44,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:26:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:26:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 00:26:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-03 00:26:44,614 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2021-05-03 00:26:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:44,614 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-03 00:26:44,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-03 00:26:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:26:44,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:44,614 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:44,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 00:26:44,614 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -524019799, now seen corresponding path program 15 times [2021-05-03 00:26:44,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:44,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818270275] [2021-05-03 00:26:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:44,618 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:44,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:44,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:44,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818270275] [2021-05-03 00:26:44,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818270275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:44,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:44,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:26:44,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112496719] [2021-05-03 00:26:44,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:26:44,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:26:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:26:44,848 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:45,683 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-03 00:26:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:26:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-03 00:26:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:45,684 INFO L225 Difference]: With dead ends: 36 [2021-05-03 00:26:45,684 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:26:45,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:26:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:26:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-05-03 00:26:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-03 00:26:45,688 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2021-05-03 00:26:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:45,688 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-03 00:26:45,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-03 00:26:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:26:45,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:45,689 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:45,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:26:45,689 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash 935258486, now seen corresponding path program 15 times [2021-05-03 00:26:45,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:45,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762560854] [2021-05-03 00:26:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:45,692 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:45,693 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:45,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:45,920 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762560854] [2021-05-03 00:26:45,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762560854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:45,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:45,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:26:45,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407292113] [2021-05-03 00:26:45,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:26:45,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:26:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:26:45,921 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:46,416 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-03 00:26:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:26:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-03 00:26:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:46,417 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:26:46,417 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:26:46,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:26:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:26:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-03 00:26:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-03 00:26:46,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2021-05-03 00:26:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:46,423 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-03 00:26:46,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-03 00:26:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:26:46,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:46,423 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:46,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 00:26:46,424 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 935307305, now seen corresponding path program 16 times [2021-05-03 00:26:46,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:46,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753012441] [2021-05-03 00:26:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:46,428 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:46,430 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:46,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:46,683 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:46,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753012441] [2021-05-03 00:26:46,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753012441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:46,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:46,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:26:46,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778155438] [2021-05-03 00:26:46,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:26:46,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:26:46,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:26:46,686 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:47,589 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-03 00:26:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:26:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-03 00:26:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:47,590 INFO L225 Difference]: With dead ends: 37 [2021-05-03 00:26:47,590 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:26:47,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 968.3ms TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:26:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:26:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-03 00:26:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-03 00:26:47,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-03 00:26:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:47,594 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-03 00:26:47,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-03 00:26:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:26:47,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:47,597 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:47,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 00:26:47,597 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:47,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1070241546, now seen corresponding path program 16 times [2021-05-03 00:26:47,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:47,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316970617] [2021-05-03 00:26:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:47,602 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:47,603 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:47,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:47,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316970617] [2021-05-03 00:26:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316970617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:47,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:47,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:26:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350295892] [2021-05-03 00:26:47,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:26:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:26:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:26:47,848 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:48,440 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-03 00:26:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:26:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-03 00:26:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:48,441 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:26:48,441 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 00:26:48,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:26:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 00:26:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-03 00:26:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-03 00:26:48,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2021-05-03 00:26:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:48,446 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-03 00:26:48,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-03 00:26:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:26:48,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:48,447 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:48,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:26:48,447 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1070192727, now seen corresponding path program 17 times [2021-05-03 00:26:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:48,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333820641] [2021-05-03 00:26:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:48,450 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:48,451 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:48,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:48,721 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:48,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333820641] [2021-05-03 00:26:48,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333820641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:48,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:48,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-03 00:26:48,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386617438] [2021-05-03 00:26:48,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:26:48,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:26:48,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:26:48,723 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:49,675 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-03 00:26:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:26:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-03 00:26:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:49,676 INFO L225 Difference]: With dead ends: 38 [2021-05-03 00:26:49,676 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:26:49,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1051.6ms TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:26:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:26:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-05-03 00:26:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-03 00:26:49,680 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2021-05-03 00:26:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:49,680 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-03 00:26:49,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-03 00:26:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:26:49,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:49,681 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:49,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 00:26:49,681 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1183766902, now seen corresponding path program 17 times [2021-05-03 00:26:49,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:49,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486465031] [2021-05-03 00:26:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:49,686 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:49,687 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:49,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:49,911 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486465031] [2021-05-03 00:26:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [486465031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:49,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:49,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-03 00:26:49,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773490771] [2021-05-03 00:26:49,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:26:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:26:49,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:26:49,913 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:50,460 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-03 00:26:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:26:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-03 00:26:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:50,461 INFO L225 Difference]: With dead ends: 36 [2021-05-03 00:26:50,461 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:26:50,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:26:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:26:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 00:26:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-03 00:26:50,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2021-05-03 00:26:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:50,465 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-03 00:26:50,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-03 00:26:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:26:50,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:50,466 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:50,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 00:26:50,466 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1183815721, now seen corresponding path program 18 times [2021-05-03 00:26:50,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:50,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702546820] [2021-05-03 00:26:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:50,469 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:50,471 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:50,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:50,717 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:50,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702546820] [2021-05-03 00:26:50,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702546820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:50,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:50,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:26:50,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574949545] [2021-05-03 00:26:50,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:26:50,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:50,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:26:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:26:50,719 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:51,727 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-03 00:26:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:26:51,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-03 00:26:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:51,728 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:26:51,728 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:26:51,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:26:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:26:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-05-03 00:26:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-03 00:26:51,732 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2021-05-03 00:26:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:51,732 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-03 00:26:51,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-03 00:26:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:26:51,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:51,733 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:51,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:26:51,733 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1956415242, now seen corresponding path program 18 times [2021-05-03 00:26:51,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:51,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682529961] [2021-05-03 00:26:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:51,735 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:51,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:51,999 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682529961] [2021-05-03 00:26:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682529961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:51,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:52,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:26:52,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875610074] [2021-05-03 00:26:52,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:26:52,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:52,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:26:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:26:52,001 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:52,634 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-03 00:26:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:26:52,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-03 00:26:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:52,635 INFO L225 Difference]: With dead ends: 37 [2021-05-03 00:26:52,635 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:26:52,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:26:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:26:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 00:26:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-03 00:26:52,639 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2021-05-03 00:26:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:52,639 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-03 00:26:52,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-03 00:26:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:26:52,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:52,640 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:52,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 00:26:52,640 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1956366423, now seen corresponding path program 19 times [2021-05-03 00:26:52,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:52,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418257041] [2021-05-03 00:26:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:52,643 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:52,644 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:52,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:52,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:52,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418257041] [2021-05-03 00:26:52,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [418257041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:52,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:52,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:26:52,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433969462] [2021-05-03 00:26:52,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:26:52,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:26:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:26:52,913 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:53,951 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-03 00:26:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:26:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-03 00:26:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:53,952 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:26:53,952 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:26:53,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1145.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:26:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:26:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-05-03 00:26:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-03 00:26:53,957 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-05-03 00:26:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:53,957 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-03 00:26:53,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-03 00:26:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 00:26:53,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:53,957 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:53,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 00:26:53,957 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash -517813898, now seen corresponding path program 19 times [2021-05-03 00:26:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:53,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19154682] [2021-05-03 00:26:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:53,960 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:53,961 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:54,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:54,265 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:54,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19154682] [2021-05-03 00:26:54,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [19154682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:54,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:54,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:26:54,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332752199] [2021-05-03 00:26:54,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:26:54,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:54,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:26:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:26:54,267 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:54,911 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-03 00:26:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:26:54,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-03 00:26:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:54,912 INFO L225 Difference]: With dead ends: 38 [2021-05-03 00:26:54,912 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:26:54,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 796.9ms TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:26:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:26:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-03 00:26:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-03 00:26:54,917 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2021-05-03 00:26:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:54,917 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-03 00:26:54,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-03 00:26:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 00:26:54,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:54,918 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:54,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 00:26:54,918 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash -517765079, now seen corresponding path program 20 times [2021-05-03 00:26:54,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:54,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829359857] [2021-05-03 00:26:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:54,922 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:54,923 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:55,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:55,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829359857] [2021-05-03 00:26:55,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829359857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:55,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:55,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:26:55,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594150391] [2021-05-03 00:26:55,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:26:55,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:26:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:26:55,205 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:56,368 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-03 00:26:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:26:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-03 00:26:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:56,369 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:26:56,369 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:26:56,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1263.6ms TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:26:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:26:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-03 00:26:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-03 00:26:56,374 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-05-03 00:26:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:56,374 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-03 00:26:56,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-03 00:26:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:26:56,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:56,375 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:56,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-03 00:26:56,375 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:56,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1129154806, now seen corresponding path program 20 times [2021-05-03 00:26:56,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:56,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961888465] [2021-05-03 00:26:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:56,379 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:56,380 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:56,674 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:56,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961888465] [2021-05-03 00:26:56,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961888465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:56,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:56,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:26:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395492016] [2021-05-03 00:26:56,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:26:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:26:56,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:26:56,675 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:57,385 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-03 00:26:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:26:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-03 00:26:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:57,386 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:26:57,386 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:26:57,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 819.6ms TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:26:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:26:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-03 00:26:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-03 00:26:57,391 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-05-03 00:26:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:57,391 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-03 00:26:57,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-03 00:26:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:26:57,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:57,392 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:57,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 00:26:57,392 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:57,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1129203625, now seen corresponding path program 21 times [2021-05-03 00:26:57,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415014294] [2021-05-03 00:26:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:57,399 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:57,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:57,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:57,755 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:57,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415014294] [2021-05-03 00:26:57,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [415014294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:57,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:57,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-03 00:26:57,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966712469] [2021-05-03 00:26:57,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:26:57,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:57,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:26:57,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:26:57,756 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:58,987 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-03 00:26:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:26:58,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-03 00:26:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:58,988 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:26:58,988 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:26:58,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1399.2ms TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:26:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:26:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-05-03 00:26:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-03 00:26:58,994 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2021-05-03 00:26:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:58,994 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-03 00:26:58,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:26:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-03 00:26:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 00:26:58,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:58,994 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:58,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 00:26:58,994 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash 645577078, now seen corresponding path program 21 times [2021-05-03 00:26:58,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:58,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24227401] [2021-05-03 00:26:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:58,997 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:26:58,998 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:26:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:59,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:26:59,347 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:59,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24227401] [2021-05-03 00:26:59,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [24227401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:59,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:59,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-03 00:26:59,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920849859] [2021-05-03 00:26:59,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:26:59,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:26:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:26:59,348 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:00,110 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-03 00:27:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:27:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-03 00:27:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:00,111 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:27:00,111 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:27:00,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 930.7ms TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:27:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:27:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-03 00:27:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-03 00:27:00,116 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2021-05-03 00:27:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:00,116 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-03 00:27:00,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-03 00:27:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 00:27:00,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:00,117 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:00,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-03 00:27:00,117 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 645625897, now seen corresponding path program 22 times [2021-05-03 00:27:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:00,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377957871] [2021-05-03 00:27:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:00,126 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:00,127 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:00,481 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:00,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377957871] [2021-05-03 00:27:00,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [377957871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:00,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:00,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-03 00:27:00,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691240242] [2021-05-03 00:27:00,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 00:27:00,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 00:27:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:27:00,483 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:01,783 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-03 00:27:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:27:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-03 00:27:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:01,784 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:27:01,784 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:27:01,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1455.6ms TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:27:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:27:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-05-03 00:27:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-05-03 00:27:01,789 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2021-05-03 00:27:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:01,789 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-05-03 00:27:01,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-05-03 00:27:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:27:01,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:01,790 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:01,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-03 00:27:01,790 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1460430602, now seen corresponding path program 22 times [2021-05-03 00:27:01,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:01,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848536496] [2021-05-03 00:27:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:01,793 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:01,794 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:02,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:02,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:02,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848536496] [2021-05-03 00:27:02,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848536496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:02,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:02,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-03 00:27:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509102037] [2021-05-03 00:27:02,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 00:27:02,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 00:27:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:27:02,152 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:02,884 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-03 00:27:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:27:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-03 00:27:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:02,885 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:27:02,885 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:27:02,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 949.5ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:27:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:27:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-03 00:27:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-03 00:27:02,890 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2021-05-03 00:27:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:02,890 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-03 00:27:02,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-03 00:27:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:27:02,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:02,890 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:02,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 00:27:02,891 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:02,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1460381783, now seen corresponding path program 23 times [2021-05-03 00:27:02,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:02,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377900222] [2021-05-03 00:27:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:02,894 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:02,895 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:03,288 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:03,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377900222] [2021-05-03 00:27:03,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [377900222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:03,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:03,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:27:03,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548992844] [2021-05-03 00:27:03,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:27:03,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:27:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:27:03,290 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:04,721 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-03 00:27:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:27:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-03 00:27:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:04,722 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:27:04,722 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:27:04,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1591.3ms TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:27:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:27:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-05-03 00:27:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-03 00:27:04,727 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2021-05-03 00:27:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:04,727 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-03 00:27:04,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-03 00:27:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:27:04,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:04,728 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:04,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-03 00:27:04,728 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1972808054, now seen corresponding path program 23 times [2021-05-03 00:27:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:04,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606523847] [2021-05-03 00:27:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:04,733 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:04,734 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:05,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:05,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:05,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606523847] [2021-05-03 00:27:05,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [606523847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:05,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:05,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:27:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637410872] [2021-05-03 00:27:05,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:27:05,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:27:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:27:05,150 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:06,056 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-03 00:27:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:27:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-03 00:27:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:06,057 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:27:06,057 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:27:06,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1108.1ms TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:27:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:27:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 00:27:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-03 00:27:06,062 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2021-05-03 00:27:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:06,062 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-03 00:27:06,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-03 00:27:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:27:06,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:06,063 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:06,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-03 00:27:06,063 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1972856873, now seen corresponding path program 24 times [2021-05-03 00:27:06,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:06,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477761879] [2021-05-03 00:27:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:06,066 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:06,067 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:06,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:06,500 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:06,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477761879] [2021-05-03 00:27:06,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [477761879] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:06,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:06,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:27:06,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844375144] [2021-05-03 00:27:06,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 00:27:06,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 00:27:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:27:06,501 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:07,947 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-03 00:27:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:27:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-03 00:27:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:07,948 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:27:07,948 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:27:07,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1651.0ms TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:27:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:27:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-03 00:27:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-03 00:27:07,957 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-03 00:27:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:07,957 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-03 00:27:07,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-03 00:27:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:27:07,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:07,958 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:07,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 00:27:07,958 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1029023990, now seen corresponding path program 24 times [2021-05-03 00:27:07,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:07,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335219621] [2021-05-03 00:27:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:07,962 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:07,964 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:08,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:08,387 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335219621] [2021-05-03 00:27:08,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335219621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:08,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:08,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:27:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598535669] [2021-05-03 00:27:08,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 00:27:08,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 00:27:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:27:08,388 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:09,293 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-03 00:27:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:27:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-03 00:27:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:09,294 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:27:09,294 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:27:09,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1160.7ms TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:27:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:27:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-03 00:27:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-03 00:27:09,299 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2021-05-03 00:27:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:09,299 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-03 00:27:09,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-03 00:27:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:27:09,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:09,300 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:09,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-03 00:27:09,300 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1029072809, now seen corresponding path program 25 times [2021-05-03 00:27:09,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:09,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234884963] [2021-05-03 00:27:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:09,307 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:09,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:09,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:09,760 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234884963] [2021-05-03 00:27:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234884963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:09,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:09,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-03 00:27:09,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13510236] [2021-05-03 00:27:09,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:27:09,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:09,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:27:09,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:27:09,761 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:11,340 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-03 00:27:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:27:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-03 00:27:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:11,341 INFO L225 Difference]: With dead ends: 46 [2021-05-03 00:27:11,341 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:27:11,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1799.1ms TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:27:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:27:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-05-03 00:27:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-03 00:27:11,346 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2021-05-03 00:27:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:11,346 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-03 00:27:11,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-03 00:27:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 00:27:11,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:11,347 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:11,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-03 00:27:11,347 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1836489078, now seen corresponding path program 25 times [2021-05-03 00:27:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:11,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132504688] [2021-05-03 00:27:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:11,350 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:11,351 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:11,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:11,768 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132504688] [2021-05-03 00:27:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132504688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:11,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:11,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-03 00:27:11,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069383467] [2021-05-03 00:27:11,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:27:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:27:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:27:11,769 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:12,766 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-03 00:27:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:27:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-03 00:27:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:12,767 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:27:12,767 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:27:12,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1194.9ms TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:27:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:27:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-03 00:27:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-03 00:27:12,772 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2021-05-03 00:27:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:12,772 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-03 00:27:12,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-03 00:27:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 00:27:12,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:12,772 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:12,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-03 00:27:12,772 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1836537897, now seen corresponding path program 26 times [2021-05-03 00:27:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:12,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512443669] [2021-05-03 00:27:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:12,775 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:12,776 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:13,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:13,215 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:13,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512443669] [2021-05-03 00:27:13,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512443669] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:13,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:13,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:27:13,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722980750] [2021-05-03 00:27:13,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:27:13,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:27:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:27:13,217 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:14,957 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-03 00:27:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:27:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-03 00:27:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:14,959 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:27:14,959 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:27:14,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1925.5ms TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:27:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:27:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-05-03 00:27:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-03 00:27:14,964 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-05-03 00:27:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:14,964 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-03 00:27:14,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-03 00:27:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:27:14,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:14,965 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:14,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-03 00:27:14,965 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1098103030, now seen corresponding path program 26 times [2021-05-03 00:27:14,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:14,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397187627] [2021-05-03 00:27:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:14,968 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:14,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:15,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:15,472 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:15,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397187627] [2021-05-03 00:27:15,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397187627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:15,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:15,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:27:15,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395307270] [2021-05-03 00:27:15,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:27:15,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:27:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:27:15,474 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:16,426 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-03 00:27:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:27:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-03 00:27:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:16,427 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:27:16,427 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:27:16,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1274.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:27:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:27:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-03 00:27:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-03 00:27:16,432 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2021-05-03 00:27:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:16,433 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-03 00:27:16,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-03 00:27:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:27:16,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:16,433 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:16,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-03 00:27:16,433 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1098151849, now seen corresponding path program 27 times [2021-05-03 00:27:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:16,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761681420] [2021-05-03 00:27:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:16,436 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:16,437 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:16,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:16,937 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761681420] [2021-05-03 00:27:16,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761681420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:16,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:16,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:27:16,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398870515] [2021-05-03 00:27:16,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:27:16,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:27:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:27:16,939 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:18,695 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-03 00:27:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:27:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-03 00:27:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:18,696 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:27:18,696 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:27:18,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2060.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:27:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:27:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-05-03 00:27:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-03 00:27:18,701 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2021-05-03 00:27:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:18,701 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-03 00:27:18,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-03 00:27:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 00:27:18,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:18,702 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:18,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-03 00:27:18,702 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash -317027978, now seen corresponding path program 27 times [2021-05-03 00:27:18,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:18,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851386242] [2021-05-03 00:27:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:18,705 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:18,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:19,200 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:19,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851386242] [2021-05-03 00:27:19,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851386242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:19,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:19,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:27:19,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116920516] [2021-05-03 00:27:19,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:27:19,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:19,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:27:19,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:27:19,202 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:20,285 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-03 00:27:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:27:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-03 00:27:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:20,286 INFO L225 Difference]: With dead ends: 46 [2021-05-03 00:27:20,286 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:27:20,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1349.9ms TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:27:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:27:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-03 00:27:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-03 00:27:20,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2021-05-03 00:27:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:20,291 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-03 00:27:20,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-03 00:27:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 00:27:20,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:20,292 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:20,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-03 00:27:20,292 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash -316979159, now seen corresponding path program 28 times [2021-05-03 00:27:20,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:20,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569352088] [2021-05-03 00:27:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:20,302 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:20,303 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:20,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:20,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:20,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569352088] [2021-05-03 00:27:20,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569352088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:20,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:20,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-03 00:27:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183455511] [2021-05-03 00:27:20,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 00:27:20,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 00:27:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:27:20,838 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:22,691 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-03 00:27:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:27:22,692 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-03 00:27:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:22,692 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:27:22,692 INFO L226 Difference]: Without dead ends: 47 [2021-05-03 00:27:22,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2128.3ms TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:27:22,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-03 00:27:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-05-03 00:27:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-03 00:27:22,697 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2021-05-03 00:27:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:22,697 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-03 00:27:22,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-03 00:27:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:27:22,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:22,698 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:22,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-03 00:27:22,698 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1236416266, now seen corresponding path program 28 times [2021-05-03 00:27:22,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:22,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916580264] [2021-05-03 00:27:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:22,702 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:22,703 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:23,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:23,262 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:23,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916580264] [2021-05-03 00:27:23,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916580264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:23,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:23,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-03 00:27:23,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290467036] [2021-05-03 00:27:23,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 00:27:23,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 00:27:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:27:23,263 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:24,444 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-03 00:27:24,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:27:24,445 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-03 00:27:24,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:24,445 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:27:24,446 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:27:24,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1474.1ms TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:27:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:27:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-03 00:27:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-03 00:27:24,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2021-05-03 00:27:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:24,451 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-03 00:27:24,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-03 00:27:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:27:24,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:24,452 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:24,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-03 00:27:24,452 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1236367447, now seen corresponding path program 29 times [2021-05-03 00:27:24,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:24,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16788412] [2021-05-03 00:27:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:24,455 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:24,456 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:25,027 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16788412] [2021-05-03 00:27:25,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [16788412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:25,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:25,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:27:25,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001063590] [2021-05-03 00:27:25,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:27:25,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:27:25,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:27:25,028 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:26,703 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-03 00:27:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:27:26,703 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-03 00:27:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:26,704 INFO L225 Difference]: With dead ends: 50 [2021-05-03 00:27:26,704 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:27:26,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2069.2ms TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:27:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:27:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-05-03 00:27:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-03 00:27:26,708 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2021-05-03 00:27:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:26,708 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-03 00:27:26,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-03 00:27:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 00:27:26,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:26,709 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:26,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-03 00:27:26,709 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 327317878, now seen corresponding path program 29 times [2021-05-03 00:27:26,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:26,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451957141] [2021-05-03 00:27:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:26,712 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:26,712 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:27,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:27,216 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:27,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451957141] [2021-05-03 00:27:27,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [451957141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:27,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:27,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:27:27,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117341679] [2021-05-03 00:27:27,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:27:27,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:27,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:27:27,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:27:27,217 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:28,286 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-03 00:27:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:27:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-03 00:27:28,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:28,287 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:27:28,287 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:27:28,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1368.4ms TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:27:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:27:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-03 00:27:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-03 00:27:28,292 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2021-05-03 00:27:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:28,292 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-03 00:27:28,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-03 00:27:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 00:27:28,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:28,292 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:28,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-03 00:27:28,292 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash 327366697, now seen corresponding path program 30 times [2021-05-03 00:27:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252439677] [2021-05-03 00:27:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:28,297 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:28,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:28,826 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:28,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252439677] [2021-05-03 00:27:28,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252439677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:28,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:28,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-03 00:27:28,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259112562] [2021-05-03 00:27:28,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 00:27:28,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:28,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 00:27:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:27:28,828 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:30,565 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-03 00:27:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 00:27:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-03 00:27:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:30,566 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:27:30,566 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:27:30,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2105.6ms TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:27:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:27:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-03 00:27:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-05-03 00:27:30,570 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2021-05-03 00:27:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:30,571 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-05-03 00:27:30,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-05-03 00:27:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:27:30,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:30,571 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:30,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-03 00:27:30,571 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1558436086, now seen corresponding path program 30 times [2021-05-03 00:27:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:30,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671287482] [2021-05-03 00:27:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:30,578 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:30,578 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:31,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:31,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:31,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671287482] [2021-05-03 00:27:31,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [671287482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:31,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:31,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-03 00:27:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574314709] [2021-05-03 00:27:31,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 00:27:31,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 00:27:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:27:31,116 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:32,220 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-03 00:27:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 00:27:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-03 00:27:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:32,221 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:27:32,221 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:27:32,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1428.0ms TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:27:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:27:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-03 00:27:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-03 00:27:32,225 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2021-05-03 00:27:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:32,226 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-03 00:27:32,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-03 00:27:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:27:32,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:32,226 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:32,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-03 00:27:32,226 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1558484905, now seen corresponding path program 31 times [2021-05-03 00:27:32,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:32,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078832517] [2021-05-03 00:27:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:32,229 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:32,229 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:32,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:32,786 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078832517] [2021-05-03 00:27:32,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078832517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:32,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:32,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-03 00:27:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777812936] [2021-05-03 00:27:32,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 00:27:32,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 00:27:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:27:32,787 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:34,613 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-03 00:27:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:27:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-03 00:27:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:34,614 INFO L225 Difference]: With dead ends: 52 [2021-05-03 00:27:34,614 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:27:34,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2213.1ms TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:27:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:27:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-05-03 00:27:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-03 00:27:34,619 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2021-05-03 00:27:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:34,619 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-03 00:27:34,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-03 00:27:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 00:27:34,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:34,620 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:34,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-03 00:27:34,620 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1068394870, now seen corresponding path program 31 times [2021-05-03 00:27:34,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:34,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935319355] [2021-05-03 00:27:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:34,622 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:34,623 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:35,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:35,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935319355] [2021-05-03 00:27:35,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935319355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:35,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:35,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-03 00:27:35,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303843532] [2021-05-03 00:27:35,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 00:27:35,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 00:27:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:27:35,243 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:36,418 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-03 00:27:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:27:36,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-03 00:27:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:36,419 INFO L225 Difference]: With dead ends: 50 [2021-05-03 00:27:36,419 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:27:36,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1570.8ms TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:27:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:27:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-03 00:27:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-03 00:27:36,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2021-05-03 00:27:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:36,425 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-03 00:27:36,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-03 00:27:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 00:27:36,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:36,425 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:36,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-03 00:27:36,426 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443689, now seen corresponding path program 32 times [2021-05-03 00:27:36,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:36,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110502855] [2021-05-03 00:27:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:36,431 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:36,434 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:37,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:37,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:37,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110502855] [2021-05-03 00:27:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [110502855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:37,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:37,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-03 00:27:37,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812625979] [2021-05-03 00:27:37,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 00:27:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 00:27:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:27:37,058 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:39,039 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-03 00:27:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 00:27:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-03 00:27:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:39,040 INFO L225 Difference]: With dead ends: 53 [2021-05-03 00:27:39,040 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:27:39,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2336.8ms TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:27:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:27:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-05-03 00:27:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-03 00:27:39,048 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2021-05-03 00:27:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:39,048 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-03 00:27:39,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-03 00:27:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:27:39,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:39,048 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:39,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-03 00:27:39,048 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1237980938, now seen corresponding path program 32 times [2021-05-03 00:27:39,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:39,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275454165] [2021-05-03 00:27:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:39,054 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:39,055 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:39,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:39,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:39,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275454165] [2021-05-03 00:27:39,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [275454165] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:39,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:39,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-03 00:27:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191858142] [2021-05-03 00:27:39,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 00:27:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 00:27:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:27:39,668 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:40,851 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-03 00:27:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 00:27:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-03 00:27:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:40,852 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:27:40,852 INFO L226 Difference]: Without dead ends: 47 [2021-05-03 00:27:40,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1618.9ms TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:27:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-03 00:27:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-03 00:27:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-03 00:27:40,857 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2021-05-03 00:27:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:40,857 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-03 00:27:40,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-03 00:27:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:27:40,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:40,857 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:40,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-03 00:27:40,857 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1237932119, now seen corresponding path program 33 times [2021-05-03 00:27:40,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:40,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716886400] [2021-05-03 00:27:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:40,862 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:40,862 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:41,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:41,482 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:41,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716886400] [2021-05-03 00:27:41,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [716886400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:41,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:41,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:27:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573032140] [2021-05-03 00:27:41,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:27:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:27:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:27:41,483 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:43,574 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-03 00:27:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:27:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-03 00:27:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:43,575 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:27:43,575 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 00:27:43,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2465.2ms TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:27:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 00:27:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-05-03 00:27:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-05-03 00:27:43,580 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2021-05-03 00:27:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:43,580 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-05-03 00:27:43,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-05-03 00:27:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:27:43,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:43,581 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:43,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-03 00:27:43,581 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 278813046, now seen corresponding path program 33 times [2021-05-03 00:27:43,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:43,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055502705] [2021-05-03 00:27:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:43,583 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:43,584 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:44,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:44,223 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:44,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055502705] [2021-05-03 00:27:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055502705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:27:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225770820] [2021-05-03 00:27:44,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:27:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:27:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:27:44,224 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:45,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:45,562 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-03 00:27:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:27:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-03 00:27:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:45,563 INFO L225 Difference]: With dead ends: 52 [2021-05-03 00:27:45,563 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:27:45,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1721.2ms TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:27:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:27:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-03 00:27:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-03 00:27:45,568 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2021-05-03 00:27:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:45,569 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-03 00:27:45,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-03 00:27:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:27:45,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:45,569 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:45,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-03 00:27:45,569 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash 278861865, now seen corresponding path program 34 times [2021-05-03 00:27:45,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:45,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557933552] [2021-05-03 00:27:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:45,572 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:45,573 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:46,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:46,255 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557933552] [2021-05-03 00:27:46,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [557933552] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:46,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:46,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:27:46,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738388984] [2021-05-03 00:27:46,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:27:46,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:27:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:27:46,257 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:48,457 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-03 00:27:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 00:27:48,457 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-03 00:27:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:48,458 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:27:48,458 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:27:48,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2619.6ms TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 00:27:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:27:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-05-03 00:27:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-05-03 00:27:48,463 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2021-05-03 00:27:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:48,463 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-05-03 00:27:48,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-05-03 00:27:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:27:48,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:48,465 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:48,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-03 00:27:48,465 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash 54786294, now seen corresponding path program 34 times [2021-05-03 00:27:48,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:48,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429042923] [2021-05-03 00:27:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:48,468 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:48,469 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:49,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:49,142 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:49,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429042923] [2021-05-03 00:27:49,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429042923] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:49,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:49,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:27:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249341177] [2021-05-03 00:27:49,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:27:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:27:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:27:49,144 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:50,532 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-03 00:27:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 00:27:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-03 00:27:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:50,533 INFO L225 Difference]: With dead ends: 53 [2021-05-03 00:27:50,533 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:27:50,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1793.9ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 00:27:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:27:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-03 00:27:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-03 00:27:50,538 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2021-05-03 00:27:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:50,538 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-03 00:27:50,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-03 00:27:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:27:50,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:50,539 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:50,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-03 00:27:50,539 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 54835113, now seen corresponding path program 35 times [2021-05-03 00:27:50,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:50,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92701818] [2021-05-03 00:27:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:50,541 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:50,542 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:51,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:51,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92701818] [2021-05-03 00:27:51,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [92701818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:51,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:51,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:27:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961284354] [2021-05-03 00:27:51,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:27:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:27:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:27:51,235 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:53,561 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-03 00:27:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:27:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-03 00:27:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:53,562 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:27:53,562 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:27:53,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2740.7ms TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:27:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:27:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-05-03 00:27:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-03 00:27:53,567 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2021-05-03 00:27:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:53,568 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-03 00:27:53,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-03 00:27:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 00:27:53,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:53,568 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:53,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-03 00:27:53,568 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1699891574, now seen corresponding path program 35 times [2021-05-03 00:27:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:53,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166397879] [2021-05-03 00:27:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:53,570 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:53,571 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:54,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:54,321 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166397879] [2021-05-03 00:27:54,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1166397879] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:54,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:54,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:27:54,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843714492] [2021-05-03 00:27:54,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:27:54,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:27:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:27:54,323 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:56,125 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-03 00:27:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:27:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-03 00:27:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:56,127 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:27:56,127 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:27:56,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2209.7ms TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:27:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:27:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-03 00:27:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-03 00:27:56,133 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2021-05-03 00:27:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:56,133 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-03 00:27:56,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:27:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-03 00:27:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 00:27:56,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:56,133 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:56,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-03 00:27:56,133 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:56,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1699940393, now seen corresponding path program 36 times [2021-05-03 00:27:56,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:56,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903035626] [2021-05-03 00:27:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:56,136 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:27:56,137 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:27:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:57,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:27:57,041 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:57,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903035626] [2021-05-03 00:27:57,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903035626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:57,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:57,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:27:57,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176114996] [2021-05-03 00:27:57,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:27:57,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:57,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:27:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:27:57,042 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:00,082 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-03 00:28:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 00:28:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-03 00:28:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:00,083 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:28:00,083 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:28:00,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 3572.4ms TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:28:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:28:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-05-03 00:28:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-05-03 00:28:00,089 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2021-05-03 00:28:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:00,089 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-05-03 00:28:00,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-05-03 00:28:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:28:00,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:00,090 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:00,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-03 00:28:00,090 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1158547702, now seen corresponding path program 36 times [2021-05-03 00:28:00,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:00,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018996529] [2021-05-03 00:28:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:00,093 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:00,094 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:01,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:01,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018996529] [2021-05-03 00:28:01,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018996529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:01,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:01,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:28:01,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024500183] [2021-05-03 00:28:01,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:28:01,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:28:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:28:01,045 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:02,773 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-03 00:28:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 00:28:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-03 00:28:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:02,775 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:28:02,775 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:28:02,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2438.0ms TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:28:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:28:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-03 00:28:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-03 00:28:02,780 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2021-05-03 00:28:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:02,781 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-03 00:28:02,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-03 00:28:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:28:02,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:02,781 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:02,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-03 00:28:02,781 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1158596521, now seen corresponding path program 37 times [2021-05-03 00:28:02,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:02,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736625327] [2021-05-03 00:28:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:02,784 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:02,785 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:03,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:03,730 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736625327] [2021-05-03 00:28:03,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [736625327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:03,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:03,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:28:03,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962842189] [2021-05-03 00:28:03,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:28:03,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:28:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:28:03,732 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:07,052 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-03 00:28:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 00:28:07,053 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-03 00:28:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:07,054 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:28:07,054 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:28:07,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 3960.3ms TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:28:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:28:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-05-03 00:28:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-03 00:28:07,060 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2021-05-03 00:28:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:07,060 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-03 00:28:07,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-03 00:28:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-03 00:28:07,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:07,061 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:07,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-03 00:28:07,061 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1556756854, now seen corresponding path program 37 times [2021-05-03 00:28:07,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:07,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918770511] [2021-05-03 00:28:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:07,064 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:07,065 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:08,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:08,040 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:08,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918770511] [2021-05-03 00:28:08,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918770511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:08,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:08,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:28:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919250778] [2021-05-03 00:28:08,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:28:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:28:08,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:28:08,042 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:10,124 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-03 00:28:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 00:28:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-03 00:28:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:10,125 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:28:10,125 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 00:28:10,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2660.5ms TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:28:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 00:28:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-03 00:28:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-03 00:28:10,131 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2021-05-03 00:28:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:10,131 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-03 00:28:10,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-03 00:28:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-03 00:28:10,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:10,132 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:10,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-03 00:28:10,132 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1556805673, now seen corresponding path program 38 times [2021-05-03 00:28:10,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:10,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800924871] [2021-05-03 00:28:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:10,135 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:10,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:11,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:11,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800924871] [2021-05-03 00:28:11,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800924871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:11,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:11,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-03 00:28:11,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803434206] [2021-05-03 00:28:11,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:28:11,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:11,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:28:11,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:28:11,134 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:13,800 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-03 00:28:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 00:28:13,800 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-03 00:28:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:13,801 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:28:13,801 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:28:13,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3343.0ms TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 00:28:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:28:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-03 00:28:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-05-03 00:28:13,806 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2021-05-03 00:28:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:13,806 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-05-03 00:28:13,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-05-03 00:28:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:28:13,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:13,807 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:13,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-03 00:28:13,807 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1016338678, now seen corresponding path program 38 times [2021-05-03 00:28:13,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:13,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973388186] [2021-05-03 00:28:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:13,810 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:13,811 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:14,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:14,659 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973388186] [2021-05-03 00:28:14,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [973388186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:14,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:14,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-03 00:28:14,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266559269] [2021-05-03 00:28:14,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:28:14,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:28:14,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:28:14,660 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:16,274 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-03 00:28:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 00:28:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-03 00:28:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:16,275 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:28:16,276 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:28:16,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2242.9ms TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 00:28:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:28:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-03 00:28:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-03 00:28:16,281 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2021-05-03 00:28:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:16,281 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-03 00:28:16,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-03 00:28:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:28:16,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:16,281 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:16,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-03 00:28:16,282 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1016387497, now seen corresponding path program 39 times [2021-05-03 00:28:16,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:16,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789803353] [2021-05-03 00:28:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:16,294 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:16,295 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:17,178 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789803353] [2021-05-03 00:28:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [789803353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:17,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:17,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:28:17,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703879733] [2021-05-03 00:28:17,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 00:28:17,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 00:28:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:28:17,179 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:19,972 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-03 00:28:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:28:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-03 00:28:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:19,974 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:28:19,974 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 00:28:19,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 3351.3ms TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 00:28:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 00:28:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-05-03 00:28:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-03 00:28:19,979 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2021-05-03 00:28:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:19,979 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-03 00:28:19,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-03 00:28:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:28:19,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:19,980 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:19,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-03 00:28:19,980 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:19,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1443244406, now seen corresponding path program 39 times [2021-05-03 00:28:19,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:19,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817421228] [2021-05-03 00:28:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:19,983 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:19,983 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:20,870 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817421228] [2021-05-03 00:28:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817421228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:20,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:20,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:28:20,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794368608] [2021-05-03 00:28:20,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 00:28:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 00:28:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:28:20,871 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:22,558 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-03 00:28:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:28:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-03 00:28:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:22,559 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:28:22,559 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:28:22,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2351.8ms TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 00:28:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:28:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-03 00:28:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-03 00:28:22,565 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2021-05-03 00:28:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:22,565 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-03 00:28:22,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-03 00:28:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:28:22,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:22,566 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:22,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-03 00:28:22,566 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1443293225, now seen corresponding path program 40 times [2021-05-03 00:28:22,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:22,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349440603] [2021-05-03 00:28:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:22,569 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:22,570 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:23,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:23,520 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349440603] [2021-05-03 00:28:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349440603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:23,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:23,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-03 00:28:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386066095] [2021-05-03 00:28:23,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:28:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:28:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:28:23,522 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:26,509 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-03 00:28:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 00:28:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-03 00:28:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:26,510 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:28:26,510 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 00:28:26,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 3590.7ms TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 00:28:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 00:28:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-05-03 00:28:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-05-03 00:28:26,516 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2021-05-03 00:28:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:26,516 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-05-03 00:28:26,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-05-03 00:28:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 00:28:26,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:26,516 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:26,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-03 00:28:26,516 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1792420086, now seen corresponding path program 40 times [2021-05-03 00:28:26,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:26,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437922651] [2021-05-03 00:28:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:26,519 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:26,520 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:27,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:27,613 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:27,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437922651] [2021-05-03 00:28:27,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [437922651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:27,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:27,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-03 00:28:27,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674520515] [2021-05-03 00:28:27,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:28:27,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:27,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:28:27,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:28:27,614 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:30,142 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-03 00:28:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 00:28:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-03 00:28:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:30,144 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:28:30,144 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:28:30,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3273.2ms TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 00:28:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:28:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-03 00:28:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-03 00:28:30,150 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2021-05-03 00:28:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:30,150 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-03 00:28:30,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-03 00:28:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 00:28:30,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:30,150 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:30,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-03 00:28:30,151 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1792468905, now seen corresponding path program 41 times [2021-05-03 00:28:30,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:30,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002868570] [2021-05-03 00:28:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:30,158 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:30,160 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:31,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:31,376 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:31,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002868570] [2021-05-03 00:28:31,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002868570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:31,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:31,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-03 00:28:31,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456707215] [2021-05-03 00:28:31,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 00:28:31,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 00:28:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:28:31,377 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:35,640 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-03 00:28:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:28:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-03 00:28:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:35,643 INFO L225 Difference]: With dead ends: 62 [2021-05-03 00:28:35,643 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 00:28:35,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 5007.6ms TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 00:28:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 00:28:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-05-03 00:28:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-05-03 00:28:35,649 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2021-05-03 00:28:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:35,649 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-05-03 00:28:35,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-05-03 00:28:35,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 00:28:35,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:35,650 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:35,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-03 00:28:35,650 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash -268035722, now seen corresponding path program 41 times [2021-05-03 00:28:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649380695] [2021-05-03 00:28:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:35,653 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:35,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:36,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:36,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:36,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649380695] [2021-05-03 00:28:36,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649380695] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:36,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:36,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-03 00:28:36,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628653843] [2021-05-03 00:28:36,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 00:28:36,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 00:28:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:28:36,974 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:39,681 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-03 00:28:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:28:39,682 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-03 00:28:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:39,683 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:28:39,683 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:28:39,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3542.8ms TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 00:28:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:28:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-03 00:28:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-03 00:28:39,690 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2021-05-03 00:28:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:39,690 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-03 00:28:39,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-03 00:28:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 00:28:39,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:39,691 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:39,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-03 00:28:39,691 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:39,691 INFO L82 PathProgramCache]: Analyzing trace with hash -267986903, now seen corresponding path program 42 times [2021-05-03 00:28:39,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:39,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691419400] [2021-05-03 00:28:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:39,695 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:39,696 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:41,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:41,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:41,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691419400] [2021-05-03 00:28:41,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [691419400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:41,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:41,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-03 00:28:41,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952177443] [2021-05-03 00:28:41,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 00:28:41,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 00:28:41,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:28:41,058 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:45,618 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-03 00:28:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 00:28:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-03 00:28:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:45,620 INFO L225 Difference]: With dead ends: 63 [2021-05-03 00:28:45,621 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 00:28:45,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5470.6ms TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 00:28:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 00:28:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-05-03 00:28:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-05-03 00:28:45,628 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2021-05-03 00:28:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:45,628 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-05-03 00:28:45,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-05-03 00:28:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:28:45,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:45,628 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:45,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-03 00:28:45,628 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash 282343670, now seen corresponding path program 42 times [2021-05-03 00:28:45,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:45,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760393865] [2021-05-03 00:28:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:45,632 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:45,633 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:47,129 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:47,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760393865] [2021-05-03 00:28:47,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [760393865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:47,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:47,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-03 00:28:47,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977145981] [2021-05-03 00:28:47,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 00:28:47,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:47,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 00:28:47,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:28:47,130 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:50,091 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-03 00:28:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 00:28:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-03 00:28:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:50,093 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:28:50,093 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:28:50,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4034.3ms TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 00:28:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:28:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-03 00:28:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-03 00:28:50,100 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2021-05-03 00:28:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:50,100 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-03 00:28:50,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-03 00:28:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:28:50,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:50,101 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:50,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-03 00:28:50,101 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash 282392489, now seen corresponding path program 43 times [2021-05-03 00:28:50,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:50,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655140729] [2021-05-03 00:28:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:50,105 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:50,106 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:51,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:51,690 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:51,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655140729] [2021-05-03 00:28:51,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655140729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:51,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:51,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-03 00:28:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58717928] [2021-05-03 00:28:51,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 00:28:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 00:28:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:28:51,691 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:56,758 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-03 00:28:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 00:28:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-03 00:28:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:56,760 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:28:56,760 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 00:28:56,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 6287.7ms TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 00:28:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 00:28:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-05-03 00:28:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-03 00:28:56,766 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2021-05-03 00:28:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:56,767 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-03 00:28:56,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:28:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-03 00:28:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-03 00:28:56,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:56,768 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:56,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-03 00:28:56,768 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash 164235638, now seen corresponding path program 43 times [2021-05-03 00:28:56,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:56,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184731509] [2021-05-03 00:28:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:56,782 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:28:56,783 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:28:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:58,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:28:58,428 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:58,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184731509] [2021-05-03 00:28:58,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [184731509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:58,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:58,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-03 00:28:58,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50662307] [2021-05-03 00:28:58,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 00:28:58,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 00:28:58,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:28:58,429 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:01,597 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-03 00:29:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 00:29:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-03 00:29:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:01,599 INFO L225 Difference]: With dead ends: 62 [2021-05-03 00:29:01,599 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 00:29:01,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4459.7ms TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 00:29:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 00:29:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-03 00:29:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-03 00:29:01,618 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2021-05-03 00:29:01,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:01,619 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-03 00:29:01,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-03 00:29:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-03 00:29:01,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:01,619 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:01,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-03 00:29:01,619 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 164284457, now seen corresponding path program 44 times [2021-05-03 00:29:01,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:01,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617948069] [2021-05-03 00:29:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:01,623 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:01,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:03,313 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:03,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617948069] [2021-05-03 00:29:03,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617948069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:03,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:03,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-03 00:29:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555911041] [2021-05-03 00:29:03,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 00:29:03,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 00:29:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:29:03,314 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:08,934 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-03 00:29:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 00:29:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-03 00:29:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:08,936 INFO L225 Difference]: With dead ends: 65 [2021-05-03 00:29:08,936 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 00:29:08,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 6933.2ms TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 00:29:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 00:29:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-05-03 00:29:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-05-03 00:29:08,943 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2021-05-03 00:29:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:08,943 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-05-03 00:29:08,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-05-03 00:29:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 00:29:08,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:08,944 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:08,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-03 00:29:08,944 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash 797853942, now seen corresponding path program 44 times [2021-05-03 00:29:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:08,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184803045] [2021-05-03 00:29:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:08,948 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:08,949 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:10,811 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:10,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184803045] [2021-05-03 00:29:10,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [184803045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:10,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:10,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-03 00:29:10,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546756310] [2021-05-03 00:29:10,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 00:29:10,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 00:29:10,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:29:10,813 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:14,217 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-03 00:29:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 00:29:14,219 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-03 00:29:14,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:14,220 INFO L225 Difference]: With dead ends: 63 [2021-05-03 00:29:14,220 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 00:29:14,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4895.7ms TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 00:29:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 00:29:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-03 00:29:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-03 00:29:14,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2021-05-03 00:29:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:14,226 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-03 00:29:14,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-03 00:29:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 00:29:14,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:14,227 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:14,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-03 00:29:14,227 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 797902761, now seen corresponding path program 45 times [2021-05-03 00:29:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:14,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813270723] [2021-05-03 00:29:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:14,231 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:14,231 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:16,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:16,083 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:16,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813270723] [2021-05-03 00:29:16,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [813270723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:16,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:16,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-03 00:29:16,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464216016] [2021-05-03 00:29:16,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-03 00:29:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-03 00:29:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:29:16,084 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:22,237 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-03 00:29:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 00:29:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-03 00:29:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:22,240 INFO L225 Difference]: With dead ends: 66 [2021-05-03 00:29:22,240 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 00:29:22,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 7588.3ms TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 00:29:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 00:29:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-03 00:29:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-03 00:29:22,247 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2021-05-03 00:29:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:22,247 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-03 00:29:22,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-03 00:29:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-03 00:29:22,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:22,248 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:22,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-03 00:29:22,248 INFO L428 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1034815114, now seen corresponding path program 45 times [2021-05-03 00:29:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:22,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752853339] [2021-05-03 00:29:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:22,251 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:22,252 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:24,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:24,449 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:24,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752853339] [2021-05-03 00:29:24,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752853339] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:24,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:24,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-03 00:29:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680584977] [2021-05-03 00:29:24,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-03 00:29:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:24,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-03 00:29:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:29:24,450 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:28,570 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-03 00:29:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 00:29:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-03 00:29:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:28,572 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:29:28,572 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 00:29:28,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5826.9ms TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 00:29:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 00:29:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-03 00:29:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-03 00:29:28,579 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2021-05-03 00:29:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:28,579 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-03 00:29:28,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-03 00:29:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-03 00:29:28,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:28,579 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:28,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-03 00:29:28,580 INFO L428 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1034766295, now seen corresponding path program 46 times [2021-05-03 00:29:28,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:28,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548640907] [2021-05-03 00:29:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:28,583 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:28,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:30,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:30,371 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548640907] [2021-05-03 00:29:30,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [548640907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:30,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:30,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-03 00:29:30,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354870442] [2021-05-03 00:29:30,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 00:29:30,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:30,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 00:29:30,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:29:30,372 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:35,097 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-03 00:29:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 00:29:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-03 00:29:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:35,099 INFO L225 Difference]: With dead ends: 67 [2021-05-03 00:29:35,099 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 00:29:35,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 6014.7ms TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 00:29:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 00:29:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-05-03 00:29:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-05-03 00:29:35,105 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2021-05-03 00:29:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:35,105 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-05-03 00:29:35,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-05-03 00:29:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 00:29:35,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:35,106 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:35,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-03 00:29:35,106 INFO L428 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:35,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2012981002, now seen corresponding path program 46 times [2021-05-03 00:29:35,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:35,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858568368] [2021-05-03 00:29:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:35,110 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:35,111 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:36,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:36,527 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:36,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858568368] [2021-05-03 00:29:36,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858568368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:36,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:36,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-03 00:29:36,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972864163] [2021-05-03 00:29:36,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 00:29:36,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 00:29:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:29:36,529 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:39,397 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-03 00:29:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 00:29:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-03 00:29:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:39,398 INFO L225 Difference]: With dead ends: 65 [2021-05-03 00:29:39,398 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 00:29:39,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3838.6ms TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 00:29:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 00:29:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-03 00:29:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-03 00:29:39,404 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2021-05-03 00:29:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:39,404 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-03 00:29:39,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-03 00:29:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 00:29:39,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:39,405 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:39,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-03 00:29:39,405 INFO L428 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2012932183, now seen corresponding path program 47 times [2021-05-03 00:29:39,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:39,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606953759] [2021-05-03 00:29:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:39,408 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:39,408 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:40,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:40,940 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:40,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606953759] [2021-05-03 00:29:40,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606953759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:40,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:40,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-03 00:29:40,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236777627] [2021-05-03 00:29:40,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 00:29:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:40,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 00:29:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:29:40,941 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:45,325 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-03 00:29:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 00:29:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-03 00:29:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:45,327 INFO L225 Difference]: With dead ends: 68 [2021-05-03 00:29:45,327 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 00:29:45,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 5600.7ms TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 00:29:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 00:29:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-05-03 00:29:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-03 00:29:45,347 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2021-05-03 00:29:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:45,347 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-03 00:29:45,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-03 00:29:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-03 00:29:45,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:45,347 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:45,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-03 00:29:45,348 INFO L428 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:45,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2023614838, now seen corresponding path program 47 times [2021-05-03 00:29:45,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:45,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425482396] [2021-05-03 00:29:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:45,351 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:45,352 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:46,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:46,976 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425482396] [2021-05-03 00:29:46,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425482396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:46,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:46,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-03 00:29:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788303526] [2021-05-03 00:29:46,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 00:29:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 00:29:46,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:29:46,977 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:49,991 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-03 00:29:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 00:29:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-03 00:29:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:49,993 INFO L225 Difference]: With dead ends: 66 [2021-05-03 00:29:49,993 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 00:29:49,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 4191.8ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 00:29:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 00:29:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-03 00:29:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-03 00:29:49,999 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2021-05-03 00:29:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:49,999 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-03 00:29:49,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-03 00:29:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-03 00:29:49,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:49,999 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:49,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-03 00:29:49,999 INFO L428 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:50,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:50,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2023663657, now seen corresponding path program 48 times [2021-05-03 00:29:50,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:50,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616835928] [2021-05-03 00:29:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:50,004 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:50,005 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:51,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:51,703 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:51,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616835928] [2021-05-03 00:29:51,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [616835928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:51,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:51,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-03 00:29:51,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279692677] [2021-05-03 00:29:51,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-03 00:29:51,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:51,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-03 00:29:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:29:51,705 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:56,690 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-03 00:29:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 00:29:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-03 00:29:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:56,691 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:29:56,692 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 00:29:56,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 6118.3ms TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2021-05-03 00:29:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 00:29:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-05-03 00:29:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-05-03 00:29:56,703 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2021-05-03 00:29:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:56,703 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-05-03 00:29:56,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-05-03 00:29:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-03 00:29:56,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:56,704 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:56,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-03 00:29:56,704 INFO L428 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:56,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1690933002, now seen corresponding path program 48 times [2021-05-03 00:29:56,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:56,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740122865] [2021-05-03 00:29:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:56,707 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:29:56,708 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:58,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:58,440 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:58,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740122865] [2021-05-03 00:29:58,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740122865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:58,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:58,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-03 00:29:58,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302766008] [2021-05-03 00:29:58,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-03 00:29:58,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-03 00:29:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:29:58,441 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:01,602 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-03 00:30:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 00:30:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-03 00:30:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:01,604 INFO L225 Difference]: With dead ends: 67 [2021-05-03 00:30:01,604 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 00:30:01,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 4361.8ms TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2021-05-03 00:30:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 00:30:01,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-03 00:30:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-03 00:30:01,610 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2021-05-03 00:30:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:01,610 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-03 00:30:01,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-03 00:30:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-03 00:30:01,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:01,611 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:01,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-03 00:30:01,611 INFO L428 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1690884183, now seen corresponding path program 49 times [2021-05-03 00:30:01,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:01,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271601782] [2021-05-03 00:30:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:01,614 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:01,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:03,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:03,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:03,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271601782] [2021-05-03 00:30:03,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271601782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:03,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:03,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-03 00:30:03,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369885043] [2021-05-03 00:30:03,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-03 00:30:03,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-03 00:30:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:30:03,543 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:09,090 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-03 00:30:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 00:30:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-03 00:30:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:09,092 INFO L225 Difference]: With dead ends: 70 [2021-05-03 00:30:09,092 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 00:30:09,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 6896.9ms TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2021-05-03 00:30:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 00:30:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-05-03 00:30:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-03 00:30:09,098 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2021-05-03 00:30:09,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:09,098 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-03 00:30:09,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-03 00:30:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-03 00:30:09,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:09,099 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:09,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-03 00:30:09,099 INFO L428 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:09,099 INFO L82 PathProgramCache]: Analyzing trace with hash -877799050, now seen corresponding path program 49 times [2021-05-03 00:30:09,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:09,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268724029] [2021-05-03 00:30:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:09,102 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:09,103 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:10,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:10,844 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:10,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268724029] [2021-05-03 00:30:10,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [268724029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:10,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:10,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-03 00:30:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536777664] [2021-05-03 00:30:10,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-03 00:30:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-03 00:30:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:30:10,845 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:14,049 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-03 00:30:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 00:30:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-03 00:30:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:14,050 INFO L225 Difference]: With dead ends: 68 [2021-05-03 00:30:14,050 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 00:30:14,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 4443.6ms TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2021-05-03 00:30:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 00:30:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-03 00:30:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-03 00:30:14,057 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2021-05-03 00:30:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:14,057 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-03 00:30:14,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-03 00:30:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-03 00:30:14,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:14,057 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:14,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-03 00:30:14,057 INFO L428 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash -877750231, now seen corresponding path program 50 times [2021-05-03 00:30:14,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:14,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331959304] [2021-05-03 00:30:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:14,060 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:14,061 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:15,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:15,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:15,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331959304] [2021-05-03 00:30:15,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331959304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:15,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:15,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-03 00:30:15,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071385905] [2021-05-03 00:30:15,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-03 00:30:15,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-03 00:30:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:30:15,853 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:21,097 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-03 00:30:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 00:30:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-03 00:30:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:21,099 INFO L225 Difference]: With dead ends: 71 [2021-05-03 00:30:21,099 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 00:30:21,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 6503.5ms TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 00:30:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 00:30:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-05-03 00:30:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-05-03 00:30:21,106 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2021-05-03 00:30:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:21,106 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-05-03 00:30:21,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-05-03 00:30:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-03 00:30:21,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:21,106 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:21,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-03 00:30:21,106 INFO L428 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1440450314, now seen corresponding path program 50 times [2021-05-03 00:30:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:21,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133625933] [2021-05-03 00:30:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:21,114 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:21,115 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:22,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:22,979 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:22,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133625933] [2021-05-03 00:30:22,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133625933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:22,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:22,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-03 00:30:22,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51369825] [2021-05-03 00:30:22,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-03 00:30:22,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:22,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-03 00:30:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:30:22,981 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:26,323 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-03 00:30:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 00:30:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-03 00:30:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:26,325 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:30:26,325 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 00:30:26,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 4671.9ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 00:30:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 00:30:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-03 00:30:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-03 00:30:26,332 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2021-05-03 00:30:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:26,332 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-03 00:30:26,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-03 00:30:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-03 00:30:26,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:26,332 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:26,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-03 00:30:26,332 INFO L428 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1440401495, now seen corresponding path program 51 times [2021-05-03 00:30:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104744922] [2021-05-03 00:30:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:26,335 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:26,336 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:28,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:28,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104744922] [2021-05-03 00:30:28,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104744922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:28,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:28,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-03 00:30:28,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777616599] [2021-05-03 00:30:28,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-03 00:30:28,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-03 00:30:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:30:28,221 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:33,743 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-03 00:30:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 00:30:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-03 00:30:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:33,746 INFO L225 Difference]: With dead ends: 72 [2021-05-03 00:30:33,746 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 00:30:33,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 6857.9ms TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2021-05-03 00:30:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 00:30:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-05-03 00:30:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-03 00:30:33,753 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2021-05-03 00:30:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:33,753 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-03 00:30:33,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-03 00:30:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-03 00:30:33,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:33,753 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:33,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-03 00:30:33,753 INFO L428 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1702770314, now seen corresponding path program 51 times [2021-05-03 00:30:33,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:33,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519810294] [2021-05-03 00:30:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:33,756 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:33,757 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:36,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:36,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519810294] [2021-05-03 00:30:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519810294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:36,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:36,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-03 00:30:36,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668822690] [2021-05-03 00:30:36,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-03 00:30:36,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-03 00:30:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:30:36,066 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:40,323 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-03 00:30:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 00:30:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-03 00:30:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:40,325 INFO L225 Difference]: With dead ends: 70 [2021-05-03 00:30:40,325 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 00:30:40,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 5865.8ms TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2021-05-03 00:30:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 00:30:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-03 00:30:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-03 00:30:40,332 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2021-05-03 00:30:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:40,332 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-03 00:30:40,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-03 00:30:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-03 00:30:40,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:40,332 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:40,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-03 00:30:40,333 INFO L428 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:40,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1702721495, now seen corresponding path program 52 times [2021-05-03 00:30:40,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:40,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897162217] [2021-05-03 00:30:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:40,337 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:40,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:42,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:42,813 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897162217] [2021-05-03 00:30:42,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897162217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:42,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:42,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-03 00:30:42,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587359343] [2021-05-03 00:30:42,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-03 00:30:42,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-03 00:30:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:30:42,815 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:49,894 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-03 00:30:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 00:30:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-03 00:30:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:49,896 INFO L225 Difference]: With dead ends: 73 [2021-05-03 00:30:49,896 INFO L226 Difference]: Without dead ends: 71 [2021-05-03 00:30:49,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 9030.8ms TimeCoverageRelationStatistics Valid=4403, Invalid=7369, Unknown=0, NotChecked=0, Total=11772 [2021-05-03 00:30:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-03 00:30:49,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-05-03 00:30:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-05-03 00:30:49,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2021-05-03 00:30:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:49,903 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-05-03 00:30:49,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-05-03 00:30:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-03 00:30:49,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:49,903 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:49,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-03 00:30:49,904 INFO L428 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1244755722, now seen corresponding path program 52 times [2021-05-03 00:30:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:49,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811070859] [2021-05-03 00:30:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:49,909 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:49,910 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:52,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:30:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:30:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:30:52,640 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:30:52,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811070859] [2021-05-03 00:30:52,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [811070859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:30:52,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:30:52,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-03 00:30:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587886760] [2021-05-03 00:30:52,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-03 00:30:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:30:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-03 00:30:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:30:52,642 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:30:57,567 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-03 00:30:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 00:30:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-03 00:30:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:30:57,570 INFO L225 Difference]: With dead ends: 71 [2021-05-03 00:30:57,570 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 00:30:57,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6845.6ms TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2021-05-03 00:30:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 00:30:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-03 00:30:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 63 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-03 00:30:57,577 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2021-05-03 00:30:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:30:57,577 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-03 00:30:57,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:30:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-03 00:30:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-03 00:30:57,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:30:57,578 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:30:57,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-03 00:30:57,578 INFO L428 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:30:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:30:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1244706903, now seen corresponding path program 53 times [2021-05-03 00:30:57,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:30:57,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326139505] [2021-05-03 00:30:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:30:57,584 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:30:57,585 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:30:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:00,312 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:00,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326139505] [2021-05-03 00:31:00,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326139505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:00,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:00,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-03 00:31:00,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166955263] [2021-05-03 00:31:00,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-03 00:31:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-03 00:31:00,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:31:00,313 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:31:07,930 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-03 00:31:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:31:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-03 00:31:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:31:07,933 INFO L225 Difference]: With dead ends: 74 [2021-05-03 00:31:07,933 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 00:31:07,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 9848.9ms TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2021-05-03 00:31:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 00:31:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-05-03 00:31:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-03 00:31:07,940 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2021-05-03 00:31:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:31:07,940 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-03 00:31:07,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-03 00:31:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-03 00:31:07,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:31:07,941 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:31:07,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-03 00:31:07,941 INFO L428 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:31:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:31:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash 68794742, now seen corresponding path program 53 times [2021-05-03 00:31:07,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:31:07,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325523012] [2021-05-03 00:31:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:31:07,945 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:31:07,946 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:31:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:10,975 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325523012] [2021-05-03 00:31:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [325523012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:10,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:10,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-03 00:31:10,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917662794] [2021-05-03 00:31:10,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-03 00:31:10,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-03 00:31:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:31:10,976 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:31:16,089 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-03 00:31:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:31:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-03 00:31:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:31:16,092 INFO L225 Difference]: With dead ends: 72 [2021-05-03 00:31:16,092 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 00:31:16,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 7311.3ms TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2021-05-03 00:31:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 00:31:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-03 00:31:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-03 00:31:16,098 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2021-05-03 00:31:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:31:16,099 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-03 00:31:16,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-03 00:31:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-03 00:31:16,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:31:16,099 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:31:16,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-03 00:31:16,099 INFO L428 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:31:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:31:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 68843561, now seen corresponding path program 54 times [2021-05-03 00:31:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:31:16,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820973625] [2021-05-03 00:31:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:31:16,105 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:31:16,106 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:31:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:18,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:18,990 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:18,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820973625] [2021-05-03 00:31:18,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820973625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:18,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:18,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-03 00:31:18,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350402681] [2021-05-03 00:31:18,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-03 00:31:18,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:18,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-03 00:31:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:31:18,992 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:31:27,370 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-03 00:31:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 00:31:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-03 00:31:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:31:27,373 INFO L225 Difference]: With dead ends: 75 [2021-05-03 00:31:27,373 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 00:31:27,374 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 10688.0ms TimeCoverageRelationStatistics Valid=4734, Invalid=7922, Unknown=0, NotChecked=0, Total=12656 [2021-05-03 00:31:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 00:31:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-05-03 00:31:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-05-03 00:31:27,380 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2021-05-03 00:31:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:31:27,381 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-05-03 00:31:27,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-05-03 00:31:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-03 00:31:27,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:31:27,382 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:31:27,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-03 00:31:27,382 INFO L428 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:31:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:31:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2134153462, now seen corresponding path program 54 times [2021-05-03 00:31:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:31:27,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592662018] [2021-05-03 00:31:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:31:27,389 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:31:27,390 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:31:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:30,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:30,631 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:30,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592662018] [2021-05-03 00:31:30,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592662018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:30,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:30,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-03 00:31:30,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927046142] [2021-05-03 00:31:30,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-03 00:31:30,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-03 00:31:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:31:30,633 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:31:35,812 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-03 00:31:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 00:31:35,813 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-03 00:31:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:31:35,814 INFO L225 Difference]: With dead ends: 73 [2021-05-03 00:31:35,814 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 00:31:35,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 7492.6ms TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2021-05-03 00:31:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 00:31:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-03 00:31:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-03 00:31:35,821 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2021-05-03 00:31:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:31:35,821 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-03 00:31:35,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-03 00:31:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-03 00:31:35,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:31:35,821 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:31:35,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-03 00:31:35,821 INFO L428 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:31:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:31:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2134202281, now seen corresponding path program 55 times [2021-05-03 00:31:35,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:31:35,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376954572] [2021-05-03 00:31:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:31:35,824 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:31:35,825 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:31:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:38,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:38,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:38,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376954572] [2021-05-03 00:31:38,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [376954572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:38,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:38,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:31:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547347396] [2021-05-03 00:31:38,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:31:38,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:38,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:31:38,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:31:38,970 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:31:46,511 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-03 00:31:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 00:31:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-03 00:31:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:31:46,513 INFO L225 Difference]: With dead ends: 76 [2021-05-03 00:31:46,513 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 00:31:46,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 9992.4ms TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2021-05-03 00:31:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 00:31:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-05-03 00:31:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-03 00:31:46,520 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2021-05-03 00:31:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:31:46,520 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-03 00:31:46,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-03 00:31:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-03 00:31:46,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:31:46,520 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:31:46,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-03 00:31:46,520 INFO L428 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:31:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:31:46,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1735764342, now seen corresponding path program 55 times [2021-05-03 00:31:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:31:46,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25891210] [2021-05-03 00:31:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:31:46,523 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:31:46,523 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:31:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:49,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:49,450 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:49,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25891210] [2021-05-03 00:31:49,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [25891210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:49,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:49,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:31:49,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611330738] [2021-05-03 00:31:49,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:31:49,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:49,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:31:49,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:31:49,451 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:31:54,469 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-03 00:31:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 00:31:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-03 00:31:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:31:54,471 INFO L225 Difference]: With dead ends: 74 [2021-05-03 00:31:54,472 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 00:31:54,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7162.3ms TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2021-05-03 00:31:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 00:31:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-03 00:31:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-03 00:31:54,478 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2021-05-03 00:31:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:31:54,478 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-03 00:31:54,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:31:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-03 00:31:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-03 00:31:54,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:31:54,479 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:31:54,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-03 00:31:54,479 INFO L428 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:31:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:31:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1735813161, now seen corresponding path program 56 times [2021-05-03 00:31:54,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:31:54,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491639522] [2021-05-03 00:31:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:31:54,482 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:31:54,482 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:31:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:57,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:31:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:31:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:31:57,415 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:31:57,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491639522] [2021-05-03 00:31:57,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491639522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:31:57,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:31:57,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-03 00:31:57,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090127331] [2021-05-03 00:31:57,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-03 00:31:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:31:57,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-03 00:31:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:31:57,416 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:32:05,957 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-03 00:32:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 00:32:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-03 00:32:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:32:05,959 INFO L225 Difference]: With dead ends: 77 [2021-05-03 00:32:05,959 INFO L226 Difference]: Without dead ends: 75 [2021-05-03 00:32:05,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 10591.3ms TimeCoverageRelationStatistics Valid=5077, Invalid=8495, Unknown=0, NotChecked=0, Total=13572 [2021-05-03 00:32:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-03 00:32:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-05-03 00:32:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-05-03 00:32:05,966 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2021-05-03 00:32:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:32:05,966 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-05-03 00:32:05,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-05-03 00:32:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-03 00:32:05,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:32:05,967 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:32:05,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-03 00:32:05,967 INFO L428 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:32:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:32:05,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2024363786, now seen corresponding path program 56 times [2021-05-03 00:32:05,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:32:05,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420248688] [2021-05-03 00:32:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:32:05,970 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:32:05,970 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:32:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:09,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:32:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:32:09,259 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:32:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420248688] [2021-05-03 00:32:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [420248688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:32:09,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:32:09,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-03 00:32:09,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963980834] [2021-05-03 00:32:09,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-03 00:32:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:32:09,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-03 00:32:09,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:32:09,260 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:32:14,982 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-03 00:32:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 00:32:14,984 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-03 00:32:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:32:14,985 INFO L225 Difference]: With dead ends: 75 [2021-05-03 00:32:14,985 INFO L226 Difference]: Without dead ends: 71 [2021-05-03 00:32:14,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 8240.2ms TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2021-05-03 00:32:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-03 00:32:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-03 00:32:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-03 00:32:14,992 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2021-05-03 00:32:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:32:14,992 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-03 00:32:14,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-03 00:32:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-03 00:32:14,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:32:14,992 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:32:14,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-03 00:32:14,993 INFO L428 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:32:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:32:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2024314967, now seen corresponding path program 57 times [2021-05-03 00:32:14,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:32:14,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41847052] [2021-05-03 00:32:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:32:14,999 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:32:14,999 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:32:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:18,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:32:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:32:18,648 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:32:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41847052] [2021-05-03 00:32:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [41847052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:32:18,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:32:18,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-03 00:32:18,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029530341] [2021-05-03 00:32:18,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-03 00:32:18,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:32:18,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-03 00:32:18,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:32:18,649 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:32:28,496 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-03 00:32:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 00:32:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-03 00:32:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:32:28,499 INFO L225 Difference]: With dead ends: 78 [2021-05-03 00:32:28,499 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 00:32:28,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 12499.6ms TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 00:32:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 00:32:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-05-03 00:32:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-05-03 00:32:28,506 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 67 [2021-05-03 00:32:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:32:28,506 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-05-03 00:32:28,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-05-03 00:32:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-03 00:32:28,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:32:28,506 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:32:28,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-03 00:32:28,506 INFO L428 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:32:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:32:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1670748534, now seen corresponding path program 57 times [2021-05-03 00:32:28,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:32:28,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632770005] [2021-05-03 00:32:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:32:28,511 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:32:28,511 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:32:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:31,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:32:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:32:31,941 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:32:31,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632770005] [2021-05-03 00:32:31,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [632770005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:32:31,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:32:31,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-03 00:32:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957759094] [2021-05-03 00:32:31,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-03 00:32:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:32:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-03 00:32:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:32:31,942 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:32:38,218 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-03 00:32:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 00:32:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-03 00:32:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:32:38,221 INFO L225 Difference]: With dead ends: 76 [2021-05-03 00:32:38,221 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 00:32:38,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 8693.1ms TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 00:32:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 00:32:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-03 00:32:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-03 00:32:38,228 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2021-05-03 00:32:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:32:38,228 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-03 00:32:38,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-03 00:32:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-03 00:32:38,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:32:38,228 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:32:38,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-03 00:32:38,228 INFO L428 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:32:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:32:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1670797353, now seen corresponding path program 58 times [2021-05-03 00:32:38,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:32:38,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477111054] [2021-05-03 00:32:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:32:38,232 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:32:38,232 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:32:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:41,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:32:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:32:41,826 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:32:41,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477111054] [2021-05-03 00:32:41,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [477111054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:32:41,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:32:41,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-03 00:32:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893167157] [2021-05-03 00:32:41,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-03 00:32:41,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:32:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-03 00:32:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:32:41,828 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:32:53,615 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-03 00:32:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 00:32:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-03 00:32:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:32:53,618 INFO L225 Difference]: With dead ends: 79 [2021-05-03 00:32:53,618 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 00:32:53,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 14197.7ms TimeCoverageRelationStatistics Valid=5432, Invalid=9088, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 00:32:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 00:32:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-03 00:32:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-05-03 00:32:53,625 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2021-05-03 00:32:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:32:53,625 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-05-03 00:32:53,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:32:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-05-03 00:32:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-03 00:32:53,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:32:53,625 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:32:53,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-03 00:32:53,625 INFO L428 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:32:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:32:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash 255113462, now seen corresponding path program 58 times [2021-05-03 00:32:53,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:32:53,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342494383] [2021-05-03 00:32:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:32:53,629 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:32:53,630 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:32:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:57,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:32:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:32:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:32:57,956 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:32:57,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342494383] [2021-05-03 00:32:57,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342494383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:32:57,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:32:57,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-03 00:32:57,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038246864] [2021-05-03 00:32:57,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-03 00:32:57,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:32:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-03 00:32:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:32:57,957 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:04,984 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-03 00:33:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 00:33:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-03 00:33:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:04,986 INFO L225 Difference]: With dead ends: 77 [2021-05-03 00:33:04,986 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 00:33:04,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 10433.4ms TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 00:33:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 00:33:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-03 00:33:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-03 00:33:04,993 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2021-05-03 00:33:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:04,993 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-03 00:33:04,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-03 00:33:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-03 00:33:04,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:04,994 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:04,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-03 00:33:04,994 INFO L428 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:04,994 INFO L82 PathProgramCache]: Analyzing trace with hash 255162281, now seen corresponding path program 59 times [2021-05-03 00:33:04,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:04,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844979009] [2021-05-03 00:33:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:05,002 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:33:05,003 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:33:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:09,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:09,222 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:09,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844979009] [2021-05-03 00:33:09,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1844979009] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:09,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:09,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-03 00:33:09,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150535324] [2021-05-03 00:33:09,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-03 00:33:09,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-03 00:33:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:33:09,223 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:19,829 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-03 00:33:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 00:33:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-03 00:33:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:19,832 INFO L225 Difference]: With dead ends: 80 [2021-05-03 00:33:19,832 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 00:33:19,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 14265.0ms TimeCoverageRelationStatistics Valid=5614, Invalid=9392, Unknown=0, NotChecked=0, Total=15006 [2021-05-03 00:33:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 00:33:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-05-03 00:33:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-03 00:33:19,840 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2021-05-03 00:33:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:19,840 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-03 00:33:19,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-03 00:33:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-03 00:33:19,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:19,840 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:19,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-03 00:33:19,840 INFO L428 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -679900810, now seen corresponding path program 59 times [2021-05-03 00:33:19,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:19,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264895147] [2021-05-03 00:33:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:19,845 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:33:19,846 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:33:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:24,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:24,042 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264895147] [2021-05-03 00:33:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264895147] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:24,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:24,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-03 00:33:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040934615] [2021-05-03 00:33:24,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-03 00:33:24,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-03 00:33:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:33:24,043 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:31,702 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-03 00:33:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 00:33:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-03 00:33:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:31,705 INFO L225 Difference]: With dead ends: 78 [2021-05-03 00:33:31,705 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 00:33:31,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 10679.8ms TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2021-05-03 00:33:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 00:33:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-03 00:33:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-03 00:33:31,713 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2021-05-03 00:33:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:31,713 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-03 00:33:31,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-03 00:33:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-03 00:33:31,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:31,713 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:31,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-03 00:33:31,713 INFO L428 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash -679851991, now seen corresponding path program 60 times [2021-05-03 00:33:31,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:31,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821598654] [2021-05-03 00:33:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:31,717 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:33:31,717 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:33:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:36,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:36,722 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821598654] [2021-05-03 00:33:36,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [821598654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:36,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:36,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-03 00:33:36,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596897017] [2021-05-03 00:33:36,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-03 00:33:36,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:36,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-03 00:33:36,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:33:36,724 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:37,099 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:33:37,223 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:37,344 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:37,468 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:37,596 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:37,868 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:38,018 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:38,167 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:38,317 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:38,933 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:39,288 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:39,483 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:41,792 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:42,244 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:42,953 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:43,212 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:43,483 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:43,756 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:44,032 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:44,313 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:44,596 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:44,878 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:45,161 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:45,462 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:45,774 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:46,075 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:46,375 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:46,670 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:46,973 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:47,291 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:47,613 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:47,942 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:48,909 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:49,250 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:49,589 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:49,934 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:33:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:51,673 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-03 00:33:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 00:33:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-03 00:33:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:51,678 INFO L225 Difference]: With dead ends: 81 [2021-05-03 00:33:51,678 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 00:33:51,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 18430.4ms TimeCoverageRelationStatistics Valid=5799, Invalid=9701, Unknown=0, NotChecked=0, Total=15500 [2021-05-03 00:33:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 00:33:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-05-03 00:33:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-05-03 00:33:51,685 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2021-05-03 00:33:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:51,685 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-05-03 00:33:51,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-05-03 00:33:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-03 00:33:51,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:51,686 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:51,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-03 00:33:51,686 INFO L428 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 399427830, now seen corresponding path program 60 times [2021-05-03 00:33:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417983730] [2021-05-03 00:33:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:51,690 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:33:51,690 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:33:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:56,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:56,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:56,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417983730] [2021-05-03 00:33:56,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417983730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:56,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:56,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-03 00:33:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232201326] [2021-05-03 00:33:56,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-03 00:33:56,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-03 00:33:56,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:33:56,891 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:06,109 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-03 00:34:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 00:34:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-03 00:34:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:06,113 INFO L225 Difference]: With dead ends: 79 [2021-05-03 00:34:06,113 INFO L226 Difference]: Without dead ends: 75 [2021-05-03 00:34:06,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 12851.3ms TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2021-05-03 00:34:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-03 00:34:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-03 00:34:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 71 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-03 00:34:06,120 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2021-05-03 00:34:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:06,120 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-03 00:34:06,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-03 00:34:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-03 00:34:06,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:06,121 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:06,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-03 00:34:06,121 INFO L428 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 399476649, now seen corresponding path program 61 times [2021-05-03 00:34:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:06,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236104823] [2021-05-03 00:34:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:06,127 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:34:06,128 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:34:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:12,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:12,266 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:12,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236104823] [2021-05-03 00:34:12,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236104823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:12,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:12,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-03 00:34:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033432420] [2021-05-03 00:34:12,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-03 00:34:12,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:12,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-03 00:34:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:34:12,268 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:12,644 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:34:12,773 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:12,893 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:26,090 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-03 00:34:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 00:34:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-03 00:34:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:26,094 INFO L225 Difference]: With dead ends: 82 [2021-05-03 00:34:26,094 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 00:34:26,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 18479.6ms TimeCoverageRelationStatistics Valid=5987, Invalid=10015, Unknown=0, NotChecked=0, Total=16002 [2021-05-03 00:34:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 00:34:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-05-03 00:34:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-03 00:34:26,101 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2021-05-03 00:34:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:26,101 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-03 00:34:26,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-03 00:34:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-03 00:34:26,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:26,101 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:26,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-03 00:34:26,102 INFO L428 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:26,102 INFO L82 PathProgramCache]: Analyzing trace with hash -501122698, now seen corresponding path program 61 times [2021-05-03 00:34:26,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:26,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141419753] [2021-05-03 00:34:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:26,116 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:34:26,116 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:34:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:31,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:31,590 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:31,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141419753] [2021-05-03 00:34:31,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141419753] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:31,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:31,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-03 00:34:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907782125] [2021-05-03 00:34:31,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-03 00:34:31,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:31,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-03 00:34:31,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:34:31,591 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:40,646 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-03 00:34:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 00:34:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-03 00:34:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:40,650 INFO L225 Difference]: With dead ends: 80 [2021-05-03 00:34:40,650 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 00:34:40,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 13079.9ms TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2021-05-03 00:34:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 00:34:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-03 00:34:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-03 00:34:40,657 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2021-05-03 00:34:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:40,657 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-03 00:34:40,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-03 00:34:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-03 00:34:40,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:40,658 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:40,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-03 00:34:40,658 INFO L428 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -501073879, now seen corresponding path program 62 times [2021-05-03 00:34:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:40,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257592790] [2021-05-03 00:34:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:40,663 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:34:40,664 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:34:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:47,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:47,417 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:47,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257592790] [2021-05-03 00:34:47,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257592790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:47,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:47,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-03 00:34:47,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921677820] [2021-05-03 00:34:47,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-03 00:34:47,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-03 00:34:47,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:34:47,418 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:47,900 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:34:48,038 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:48,176 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:48,307 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:48,460 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:48,609 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:48,760 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:48,915 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:49,078 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:49,266 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:49,467 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:49,678 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:49,861 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:50,053 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:50,240 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:50,435 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:50,635 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:50,839 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:51,045 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:51,249 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:51,459 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:51,683 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:51,915 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:52,151 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:52,390 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:52,632 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:52,897 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:53,150 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:53,403 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:53,662 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:53,945 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:54,224 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:54,503 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:54,792 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:55,087 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:55,393 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:55,707 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:56,027 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:56,356 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:56,677 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:57,001 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:57,333 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:57,679 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:58,049 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:58,401 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:58,759 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:59,086 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:59,397 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:34:59,733 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:00,076 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:00,397 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:02,260 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:02,601 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:02,936 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:03,636 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:05,063 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-03 00:35:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 00:35:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-03 00:35:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:05,066 INFO L225 Difference]: With dead ends: 83 [2021-05-03 00:35:05,066 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 00:35:05,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 22687.9ms TimeCoverageRelationStatistics Valid=6178, Invalid=10334, Unknown=0, NotChecked=0, Total=16512 [2021-05-03 00:35:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 00:35:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-05-03 00:35:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-05-03 00:35:05,073 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2021-05-03 00:35:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:05,073 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-05-03 00:35:05,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-05-03 00:35:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-03 00:35:05,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:05,074 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:05,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-03 00:35:05,074 INFO L428 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1646582006, now seen corresponding path program 62 times [2021-05-03 00:35:05,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:05,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410204815] [2021-05-03 00:35:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:05,079 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:35:05,079 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:35:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:11,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:11,312 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:11,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410204815] [2021-05-03 00:35:11,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410204815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:11,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:11,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-03 00:35:11,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108213383] [2021-05-03 00:35:11,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-03 00:35:11,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-03 00:35:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:35:11,314 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:22,936 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-03 00:35:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 00:35:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-03 00:35:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:22,941 INFO L225 Difference]: With dead ends: 81 [2021-05-03 00:35:22,941 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 00:35:22,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 16172.3ms TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2021-05-03 00:35:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 00:35:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-03 00:35:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-03 00:35:22,954 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2021-05-03 00:35:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:22,954 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-03 00:35:22,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-03 00:35:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-03 00:35:22,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:22,955 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:22,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-03 00:35:22,955 INFO L428 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1646630825, now seen corresponding path program 63 times [2021-05-03 00:35:22,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:22,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334945399] [2021-05-03 00:35:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:22,970 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:35:22,971 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:35:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:29,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:29,606 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:29,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334945399] [2021-05-03 00:35:29,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334945399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:29,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:29,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-03 00:35:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381288659] [2021-05-03 00:35:29,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-03 00:35:29,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:29,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-03 00:35:29,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:35:29,607 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:30,152 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:35:30,314 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:30,466 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:30,625 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:30,783 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:30,946 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:31,106 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:31,274 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:31,458 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:31,651 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:31,846 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:32,055 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:32,270 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:32,484 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:32,702 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:32,916 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:33,139 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:33,363 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:33,606 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:33,833 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:34,071 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:34,318 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:34,576 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:34,830 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:35,096 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:35,364 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:35,641 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:35,918 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:36,212 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:36,511 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:36,819 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:37,125 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:37,435 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:37,747 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:38,046 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:38,331 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:38,665 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:38,999 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:39,341 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:39,681 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:40,019 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:40,370 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:40,728 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:41,087 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:41,452 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:41,811 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:42,176 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:42,569 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:42,942 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:43,297 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:43,670 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:44,033 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:44,468 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:44,936 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:45,370 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:45,797 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:46,217 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:46,646 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:47,087 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:47,553 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:48,029 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:48,498 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:48,977 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:35:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:50,612 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-03 00:35:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 00:35:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-03 00:35:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:50,619 INFO L225 Difference]: With dead ends: 84 [2021-05-03 00:35:50,619 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 00:35:50,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 25423.5ms TimeCoverageRelationStatistics Valid=6372, Invalid=10658, Unknown=0, NotChecked=0, Total=17030 [2021-05-03 00:35:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 00:35:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-03 00:35:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-03 00:35:50,627 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2021-05-03 00:35:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:50,627 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-03 00:35:50,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-03 00:35:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-03 00:35:50,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:50,627 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:50,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-03 00:35:50,627 INFO L428 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -494048906, now seen corresponding path program 63 times [2021-05-03 00:35:50,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:50,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124853924] [2021-05-03 00:35:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:50,643 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:35:50,644 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:35:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:58,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:58,956 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:58,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124853924] [2021-05-03 00:35:58,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [124853924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:58,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:58,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-03 00:35:58,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565177599] [2021-05-03 00:35:58,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-03 00:35:58,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:58,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-03 00:35:58,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:35:58,958 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:12,497 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-03 00:36:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 00:36:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-03 00:36:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:12,503 INFO L225 Difference]: With dead ends: 82 [2021-05-03 00:36:12,503 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 00:36:12,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 19664.1ms TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2021-05-03 00:36:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 00:36:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-03 00:36:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-03 00:36:12,511 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2021-05-03 00:36:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:12,511 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-03 00:36:12,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-03 00:36:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-03 00:36:12,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:12,512 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:12,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-03 00:36:12,512 INFO L428 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash -494000087, now seen corresponding path program 64 times [2021-05-03 00:36:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:12,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836148426] [2021-05-03 00:36:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:12,517 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:36:12,518 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:36:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:20,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:20,311 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:20,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836148426] [2021-05-03 00:36:20,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836148426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-03 00:36:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529612956] [2021-05-03 00:36:20,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-03 00:36:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-03 00:36:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:36:20,312 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:20,872 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:36:21,016 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:21,157 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:21,309 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:21,461 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:21,619 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:21,777 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:21,936 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:22,118 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:22,292 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:22,468 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:22,654 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:22,844 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:23,041 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:23,252 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:23,479 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:23,689 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:23,907 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:24,132 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:24,355 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:24,585 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:24,831 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:25,074 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:25,311 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:25,558 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:25,828 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:26,123 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:26,370 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:26,617 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:26,867 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:27,124 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:27,389 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:27,682 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:27,974 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:28,261 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:28,551 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:28,849 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:29,162 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:29,465 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:29,803 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:30,168 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:30,571 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:30,975 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:31,372 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:31,771 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:32,211 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:32,658 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:33,068 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:33,491 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:33,914 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:34,350 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:34,801 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:35,298 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:35,784 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:36,221 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:36,640 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:37,087 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:37,578 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:38,106 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:38,648 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:39,179 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:39,726 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:40,275 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:40,809 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:36:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:42,382 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-03 00:36:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 00:36:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-03 00:36:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:42,388 INFO L225 Difference]: With dead ends: 85 [2021-05-03 00:36:42,388 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 00:36:42,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 27614.8ms TimeCoverageRelationStatistics Valid=6569, Invalid=10987, Unknown=0, NotChecked=0, Total=17556 [2021-05-03 00:36:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 00:36:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-05-03 00:36:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-05-03 00:36:42,396 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2021-05-03 00:36:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:42,396 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-05-03 00:36:42,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-05-03 00:36:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-03 00:36:42,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:42,397 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:42,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-03 00:36:42,397 INFO L428 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1865869558, now seen corresponding path program 64 times [2021-05-03 00:36:42,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:42,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188425711] [2021-05-03 00:36:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:42,408 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:36:42,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:36:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:51,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:51,291 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:51,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188425711] [2021-05-03 00:36:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [188425711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:51,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:51,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-03 00:36:51,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372955642] [2021-05-03 00:36:51,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-03 00:36:51,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-03 00:36:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:36:51,293 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:08,361 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-03 00:37:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 00:37:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-03 00:37:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:08,368 INFO L225 Difference]: With dead ends: 83 [2021-05-03 00:37:08,376 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 00:37:08,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 23116.0ms TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2021-05-03 00:37:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 00:37:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-03 00:37:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-03 00:37:08,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2021-05-03 00:37:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:08,386 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-03 00:37:08,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-03 00:37:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-03 00:37:08,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:08,386 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:08,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-03 00:37:08,386 INFO L428 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1865918377, now seen corresponding path program 65 times [2021-05-03 00:37:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:08,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073595908] [2021-05-03 00:37:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:08,391 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:37:08,392 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:18,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:18,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:18,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073595908] [2021-05-03 00:37:18,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073595908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:18,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:18,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-03 00:37:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183128243] [2021-05-03 00:37:18,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-03 00:37:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-03 00:37:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:37:18,703 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:19,436 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:37:19,624 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:19,809 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:19,987 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:20,180 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:20,378 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:20,581 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:20,786 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:21,008 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:21,239 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:21,488 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:21,742 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:21,992 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:22,244 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:22,519 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:22,790 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:23,072 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:23,352 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:23,646 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:23,940 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:24,216 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:24,497 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:24,785 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:25,077 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:25,373 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:25,663 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:25,968 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:26,335 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:26,666 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:26,998 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:27,315 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:27,643 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:27,971 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:28,308 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:28,653 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:29,032 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:29,434 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:29,840 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:30,229 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:30,621 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:31,024 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:31,430 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:31,841 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:32,250 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:32,657 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:33,091 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:33,569 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:34,044 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:34,529 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:34,995 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:35,484 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:35,996 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:36,494 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:36,983 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:37,462 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:37,993 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:38,529 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:39,118 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:39,658 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:40,297 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:40,897 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:41,508 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:42,145 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:42,796 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:43,433 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:37:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:45,640 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-03 00:37:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 00:37:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-03 00:37:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:45,647 INFO L225 Difference]: With dead ends: 86 [2021-05-03 00:37:45,647 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 00:37:45,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 34260.5ms TimeCoverageRelationStatistics Valid=6769, Invalid=11321, Unknown=0, NotChecked=0, Total=18090 [2021-05-03 00:37:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 00:37:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-05-03 00:37:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-03 00:37:45,655 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2021-05-03 00:37:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:45,655 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-03 00:37:45,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-03 00:37:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-03 00:37:45,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:45,656 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:45,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-03 00:37:45,656 INFO L428 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2008897910, now seen corresponding path program 65 times [2021-05-03 00:37:45,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:45,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779378423] [2021-05-03 00:37:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:45,662 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:37:45,664 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:57,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:57,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:57,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779378423] [2021-05-03 00:37:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779378423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:57,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:57,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-03 00:37:57,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272597176] [2021-05-03 00:37:57,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-03 00:37:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-03 00:37:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:37:57,839 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:59,678 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:38:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:14,862 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-03 00:38:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 00:38:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-03 00:38:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:14,869 INFO L225 Difference]: With dead ends: 84 [2021-05-03 00:38:14,869 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 00:38:14,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 27637.2ms TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2021-05-03 00:38:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 00:38:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-03 00:38:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-03 00:38:14,877 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2021-05-03 00:38:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:14,877 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-03 00:38:14,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-03 00:38:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-03 00:38:14,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:14,878 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:14,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-03 00:38:14,878 INFO L428 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:14,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2008946729, now seen corresponding path program 66 times [2021-05-03 00:38:14,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:14,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446788984] [2021-05-03 00:38:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:14,883 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:38:14,884 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:38:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:24,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:24,987 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446788984] [2021-05-03 00:38:24,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [446788984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:24,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:24,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-03 00:38:24,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503870231] [2021-05-03 00:38:24,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-03 00:38:24,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-03 00:38:24,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 00:38:24,989 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:25,490 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:38:25,670 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:25,862 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:26,049 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:26,246 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:26,452 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:26,685 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:26,925 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:27,188 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:27,472 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:27,730 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:28,001 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:28,285 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:28,579 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:28,884 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:29,156 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:29,429 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:29,728 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:30,059 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:30,390 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:30,716 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:31,055 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:31,371 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:31,721 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:32,058 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:32,455 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:32,840 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:33,231 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:33,649 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:34,041 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:34,439 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:34,847 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:35,267 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:35,699 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:36,138 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:36,567 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:37,014 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:37,475 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:37,935 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:38,364 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:38,795 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:39,270 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:39,765 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:40,229 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:40,679 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:41,097 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:41,529 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:41,983 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:42,462 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:42,948 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:43,455 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:43,945 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:44,448 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:44,962 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:45,472 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:45,988 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:46,515 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:47,081 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:47,664 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:48,278 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:48,929 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:49,617 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:50,337 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:50,986 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:51,620 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:52,285 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:38:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:53,997 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-03 00:38:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 00:38:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-03 00:38:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:54,006 INFO L225 Difference]: With dead ends: 87 [2021-05-03 00:38:54,006 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 00:38:54,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 36829.3ms TimeCoverageRelationStatistics Valid=6972, Invalid=11660, Unknown=0, NotChecked=0, Total=18632 [2021-05-03 00:38:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 00:38:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-05-03 00:38:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-05-03 00:38:54,015 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2021-05-03 00:38:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:54,015 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-05-03 00:38:54,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-05-03 00:38:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-03 00:38:54,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:54,016 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:54,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-03 00:38:54,016 INFO L428 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2147157770, now seen corresponding path program 66 times [2021-05-03 00:38:54,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:54,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209057278] [2021-05-03 00:38:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:54,029 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:38:54,030 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:38:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:06,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:06,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:06,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209057278] [2021-05-03 00:39:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [209057278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:06,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:06,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-03 00:39:06,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206977167] [2021-05-03 00:39:06,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-03 00:39:06,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:06,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-03 00:39:06,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 00:39:06,890 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:07,903 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:39:20,286 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:39:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:27,724 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-03 00:39:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 00:39:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-03 00:39:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:27,733 INFO L225 Difference]: With dead ends: 85 [2021-05-03 00:39:27,733 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 00:39:27,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 30405.1ms TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2021-05-03 00:39:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 00:39:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-03 00:39:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-03 00:39:27,741 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2021-05-03 00:39:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:27,741 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-03 00:39:27,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-03 00:39:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-03 00:39:27,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:27,742 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:27,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-03 00:39:27,742 INFO L428 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2147108951, now seen corresponding path program 67 times [2021-05-03 00:39:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:27,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941708771] [2021-05-03 00:39:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:27,746 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-03 00:39:27,747 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:41,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:41,453 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:41,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941708771] [2021-05-03 00:39:41,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941708771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:41,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:41,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-03 00:39:41,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712155276] [2021-05-03 00:39:41,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-03 00:39:41,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-03 00:39:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:39:41,455 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:42,349 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 00:39:42,558 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:42,761 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:42,977 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:43,191 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:43,417 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:43,651 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:43,897 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:44,156 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:44,420 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:44,687 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:44,951 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:45,212 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:45,457 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:45,709 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:45,962 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 00:39:46,230 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40