/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-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:11,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:11,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:11,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:11,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:11,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:11,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:11,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:16:11,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:11,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:11,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:11,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:11,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:11,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:11,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:11,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:11,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:11,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:11,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:11,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:11,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:11,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:11,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:11,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:11,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:11,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:11,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:11,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:11,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:11,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:11,566 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:11,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:11,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:11,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:11,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:11,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:12,001 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:12,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-02 23:16:12,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a118d76/d20388df5d6a40bb9232a19cacf148f8/FLAG5a1cf47b9 [2021-05-02 23:16:12,550 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:12,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-02 23:16:12,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a118d76/d20388df5d6a40bb9232a19cacf148f8/FLAG5a1cf47b9 [2021-05-02 23:16:12,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a118d76/d20388df5d6a40bb9232a19cacf148f8 [2021-05-02 23:16:12,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:12,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:12,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:12,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:12,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:12,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:12" (1/1) ... [2021-05-02 23:16:12,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed6f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:12, skipping insertion in model container [2021-05-02 23:16:12,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:12" (1/1) ... [2021-05-02 23:16:12,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:12,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:13,169 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-acceleration/array_2-1-simple.i[809,822] [2021-05-02 23:16:13,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:13,197 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:13,210 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-acceleration/array_2-1-simple.i[809,822] [2021-05-02 23:16:13,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:13,231 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13 WrapperNode [2021-05-02 23:16:13,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:13,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:13,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:13,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:13,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (1/1) ... [2021-05-02 23:16:13,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:13,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:13,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:13,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:13,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (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 [2021-05-02 23:16:13,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:16:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:13,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:13,611 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:16:13,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:13 BoogieIcfgContainer [2021-05-02 23:16:13,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:13,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:13,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:13,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:13,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:12" (1/3) ... [2021-05-02 23:16:13,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688fe7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:13, skipping insertion in model container [2021-05-02 23:16:13,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:13" (2/3) ... [2021-05-02 23:16:13,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688fe7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:13, skipping insertion in model container [2021-05-02 23:16:13,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:13" (3/3) ... [2021-05-02 23:16:13,621 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2021-05-02 23:16:13,627 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:13,631 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:13,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:13,668 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:13,669 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:13,669 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:13,669 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:13,669 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:13,669 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:13,669 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:13,669 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:16:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:13,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,692 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,692 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2021-05-02 23:16:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813826520] [2021-05-02 23:16:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,768 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:13,956 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813826520] [2021-05-02 23:16:13,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813826520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452816215] [2021-05-02 23:16:13,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:13,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:13,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:13,988 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,107 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 23:16:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:16:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,117 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:16:14,118 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 23:16:14,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 23:16:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 23:16:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:16:14,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 23:16:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,169 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:16:14,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:16:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:14,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,170 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:14,171 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,174 INFO L82 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2021-05-02 23:16:14,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032171209] [2021-05-02 23:16:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,187 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,324 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032171209] [2021-05-02 23:16:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032171209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925473400] [2021-05-02 23:16:14,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:14,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:14,327 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,373 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:16:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:16:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,375 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:16:14,375 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:16:14,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:16:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 23:16:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:16:14,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 23:16:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,398 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:16:14,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:16:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:14,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,399 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:14,400 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2021-05-02 23:16:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760615171] [2021-05-02 23:16:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,422 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,424 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,503 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760615171] [2021-05-02 23:16:14,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760615171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:14,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838389557] [2021-05-02 23:16:14,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:14,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:14,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:14,506 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,599 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:16:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 23:16:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,602 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:16:14,602 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:16:14,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:16:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 23:16:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:16:14,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 23:16:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,619 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:16:14,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:16:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:16:14,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,620 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:14,621 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 2 times [2021-05-02 23:16:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474772047] [2021-05-02 23:16:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,635 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,638 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,770 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474772047] [2021-05-02 23:16:14,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474772047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015920498] [2021-05-02 23:16:14,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:14,773 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,817 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:16:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 23:16:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,819 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:16:14,819 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:16:14,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:16:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 23:16:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 23:16:14,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 23:16:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 23:16:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 23:16:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:16:14,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,826 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:14,827 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 3 times [2021-05-02 23:16:14,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589641313] [2021-05-02 23:16:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,843 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,845 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,953 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589641313] [2021-05-02 23:16:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [589641313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:14,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126503122] [2021-05-02 23:16:14,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:14,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:14,956 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,008 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:16:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:16:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,010 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:16:15,010 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:16:15,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:16:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 23:16:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 23:16:15,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 23:16:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,027 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 23:16:15,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 23:16:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:16:15,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,030 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:15,031 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 4 times [2021-05-02 23:16:15,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725037599] [2021-05-02 23:16:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,050 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,052 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,169 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725037599] [2021-05-02 23:16:15,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [725037599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:15,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968943669] [2021-05-02 23:16:15,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:15,171 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,220 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:16:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:16:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,223 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:16:15,223 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:16:15,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:16:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 23:16:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 23:16:15,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 23:16:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,257 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 23:16:15,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 23:16:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:16:15,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,258 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:15,258 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 5 times [2021-05-02 23:16:15,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786783116] [2021-05-02 23:16:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,271 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,274 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,382 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786783116] [2021-05-02 23:16:15,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [786783116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665436659] [2021-05-02 23:16:15,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:15,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:15,384 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,462 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:16:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 23:16:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,464 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:16:15,464 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:16:15,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:16:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 23:16:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 23:16:15,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 23:16:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,470 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 23:16:15,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 23:16:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:16:15,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,471 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:15,471 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 6 times [2021-05-02 23:16:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400285927] [2021-05-02 23:16:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,479 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,480 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,593 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400285927] [2021-05-02 23:16:15,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [400285927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:15,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668013801] [2021-05-02 23:16:15,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:15,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:15,599 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,683 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:16:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 23:16:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,686 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:16:15,686 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:16:15,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:15,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:16:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 23:16:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 23:16:15,698 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 23:16:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,699 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 23:16:15,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 23:16:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:16:15,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,700 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:15,700 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 7 times [2021-05-02 23:16:15,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519170185] [2021-05-02 23:16:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,717 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,720 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,872 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519170185] [2021-05-02 23:16:15,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [519170185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:15,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401242808] [2021-05-02 23:16:15,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:15,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:15,878 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,953 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:16:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:15,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 23:16:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,957 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:16:15,957 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:16:15,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:16:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 23:16:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 23:16:15,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 23:16:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,968 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 23:16:15,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 23:16:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:16:15,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,970 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:15,970 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 8 times [2021-05-02 23:16:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121259356] [2021-05-02 23:16:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,985 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,988 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121259356] [2021-05-02 23:16:16,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1121259356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:16,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106039795] [2021-05-02 23:16:16,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:16,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:16,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:16,163 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,238 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:16:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:16,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 23:16:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,241 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:16:16,241 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:16:16,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:16:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 23:16:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 23:16:16,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 23:16:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,247 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 23:16:16,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 23:16:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:16:16,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,248 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:16,249 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 9 times [2021-05-02 23:16:16,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623459763] [2021-05-02 23:16:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,256 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,258 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,400 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623459763] [2021-05-02 23:16:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [623459763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:16,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96017286] [2021-05-02 23:16:16,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:16,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:16,405 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,500 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:16:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:16:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,502 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:16:16,503 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:16:16,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:16:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 23:16:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 23:16:16,519 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 23:16:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,519 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 23:16:16,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 23:16:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:16:16,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,527 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:16,529 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 10 times [2021-05-02 23:16:16,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892056286] [2021-05-02 23:16:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,539 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,542 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,743 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892056286] [2021-05-02 23:16:16,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [892056286] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:16,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594515799] [2021-05-02 23:16:16,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:16,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:16,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:16,748 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,838 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:16:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 23:16:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,843 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:16:16,844 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:16:16,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:16:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 23:16:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 23:16:16,859 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 23:16:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,859 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 23:16:16,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 23:16:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:16:16,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,860 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:16,861 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 11 times [2021-05-02 23:16:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475242586] [2021-05-02 23:16:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,868 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,073 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475242586] [2021-05-02 23:16:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [475242586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454980657] [2021-05-02 23:16:17,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:17,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:17,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:17,075 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,166 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:16:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 23:16:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,168 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:16:17,168 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:16:17,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:16:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 23:16:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 23:16:17,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 23:16:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,174 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 23:16:17,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 23:16:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:16:17,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,175 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:17,175 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 12 times [2021-05-02 23:16:17,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236552883] [2021-05-02 23:16:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,183 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,185 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,366 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236552883] [2021-05-02 23:16:17,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236552883] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530756899] [2021-05-02 23:16:17,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:17,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:17,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:17,368 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,523 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:16:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 23:16:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,524 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:16:17,524 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:16:17,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:16:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 23:16:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 23:16:17,528 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 23:16:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,529 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 23:16:17,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 23:16:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:16:17,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,529 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:17,530 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 13 times [2021-05-02 23:16:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698397039] [2021-05-02 23:16:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,549 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,550 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,766 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698397039] [2021-05-02 23:16:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [698397039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294083535] [2021-05-02 23:16:17,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:17,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:17,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:17,769 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,858 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:16:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 23:16:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,860 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:16:17,860 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:16:17,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:16:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 23:16:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 23:16:17,877 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 23:16:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,877 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 23:16:17,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 23:16:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:16:17,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,880 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:17,881 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 14 times [2021-05-02 23:16:17,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169154619] [2021-05-02 23:16:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,889 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,891 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,166 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169154619] [2021-05-02 23:16:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [169154619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:18,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286837078] [2021-05-02 23:16:18,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:18,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:18,168 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,265 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:16:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 23:16:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,266 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:16:18,266 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:16:18,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:16:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 23:16:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 23:16:18,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 23:16:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,276 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 23:16:18,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 23:16:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:16:18,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,278 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:18,279 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 15 times [2021-05-02 23:16:18,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578770314] [2021-05-02 23:16:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,289 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,291 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,532 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578770314] [2021-05-02 23:16:18,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [578770314] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:18,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497876228] [2021-05-02 23:16:18,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:18,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:18,534 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,611 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:16:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:18,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:16:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,613 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:16:18,613 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:16:18,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:16:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 23:16:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 23:16:18,617 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 23:16:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,618 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 23:16:18,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 23:16:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:16:18,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,619 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:18,619 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 16 times [2021-05-02 23:16:18,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132832571] [2021-05-02 23:16:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,625 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,627 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,891 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132832571] [2021-05-02 23:16:18,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132832571] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590254151] [2021-05-02 23:16:18,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:18,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:18,893 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,002 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:16:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 23:16:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,004 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:16:19,004 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 23:16:19,004 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 23:16:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 23:16:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 23:16:19,008 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 23:16:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,008 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 23:16:19,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 23:16:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:16:19,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,009 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:19,009 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 17 times [2021-05-02 23:16:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675971346] [2021-05-02 23:16:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,016 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,017 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,292 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675971346] [2021-05-02 23:16:19,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675971346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615376217] [2021-05-02 23:16:19,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:19,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:19,296 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,416 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:16:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 23:16:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,418 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:16:19,418 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:16:19,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:16:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 23:16:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 23:16:19,422 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 23:16:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,422 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 23:16:19,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 23:16:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:16:19,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,423 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:19,423 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 18 times [2021-05-02 23:16:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121716826] [2021-05-02 23:16:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,430 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,432 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,720 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121716826] [2021-05-02 23:16:19,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [121716826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:19,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629946096] [2021-05-02 23:16:19,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:19,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:19,722 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,821 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:16:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:16:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 23:16:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,822 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:16:19,823 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:16:19,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:16:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 23:16:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 23:16:19,827 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 23:16:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,827 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 23:16:19,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 23:16:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:16:19,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,828 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:19,829 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 19 times [2021-05-02 23:16:19,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576860228] [2021-05-02 23:16:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,835 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,836 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576860228] [2021-05-02 23:16:20,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [576860228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:20,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026378923] [2021-05-02 23:16:20,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:20,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:20,135 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,262 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:16:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:16:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,263 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:16:20,263 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:16:20,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:16:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 23:16:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 23:16:20,267 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 23:16:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,268 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 23:16:20,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 23:16:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:16:20,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,268 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:20,269 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 20 times [2021-05-02 23:16:20,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067952389] [2021-05-02 23:16:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,275 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,276 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,614 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067952389] [2021-05-02 23:16:20,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067952389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91797960] [2021-05-02 23:16:20,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:20,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:20,616 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,745 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:16:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 23:16:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,748 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:16:20,748 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:16:20,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:16:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 23:16:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 23:16:20,753 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 23:16:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,754 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 23:16:20,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 23:16:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:20,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,754 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:20,755 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 21 times [2021-05-02 23:16:20,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897332431] [2021-05-02 23:16:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,761 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,762 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897332431] [2021-05-02 23:16:21,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [897332431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:21,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720683471] [2021-05-02 23:16:21,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:21,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:21,084 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,178 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 23:16:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 23:16:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,180 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:16:21,180 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:16:21,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:16:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 23:16:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 23:16:21,184 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 23:16:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,184 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 23:16:21,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 23:16:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:16:21,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,185 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:21,185 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 22 times [2021-05-02 23:16:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061948169] [2021-05-02 23:16:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,192 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,193 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,520 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061948169] [2021-05-02 23:16:21,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1061948169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:21,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158920992] [2021-05-02 23:16:21,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:21,522 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,661 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 23:16:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 23:16:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,666 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:16:21,666 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:16:21,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:16:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 23:16:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 23:16:21,671 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 23:16:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,671 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 23:16:21,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 23:16:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:16:21,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,672 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:21,672 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 23 times [2021-05-02 23:16:21,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509586546] [2021-05-02 23:16:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,678 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,680 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,064 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509586546] [2021-05-02 23:16:22,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [509586546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:22,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831997834] [2021-05-02 23:16:22,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:22,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:22,067 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,177 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 23:16:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 23:16:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,178 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:16:22,178 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 23:16:22,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 23:16:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 23:16:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 23:16:22,183 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 23:16:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,183 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 23:16:22,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 23:16:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:22,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,184 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:22,185 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 24 times [2021-05-02 23:16:22,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009173914] [2021-05-02 23:16:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,198 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,199 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,578 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009173914] [2021-05-02 23:16:22,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009173914] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:16:22,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416680439] [2021-05-02 23:16:22,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:16:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:16:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:22,580 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,713 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 23:16:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:16:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,714 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:16:22,714 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:16:22,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:16:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 23:16:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 23:16:22,719 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 23:16:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,719 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 23:16:22,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 23:16:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:16:22,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,719 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:22,720 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 25 times [2021-05-02 23:16:22,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908225271] [2021-05-02 23:16:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,725 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,727 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:23,180 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908225271] [2021-05-02 23:16:23,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [908225271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:16:23,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039899138] [2021-05-02 23:16:23,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:16:23,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:16:23,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:23,181 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,317 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 23:16:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:16:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 23:16:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,318 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:16:23,318 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:16:23,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:16:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 23:16:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 23:16:23,323 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 23:16:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,324 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 23:16:23,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 23:16:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:16:23,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,325 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:23,325 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 26 times [2021-05-02 23:16:23,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76796210] [2021-05-02 23:16:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,333 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,336 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:23,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76796210] [2021-05-02 23:16:23,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [76796210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:23,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622987115] [2021-05-02 23:16:23,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:23,840 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,955 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 23:16:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:16:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 23:16:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,961 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:16:23,961 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 23:16:23,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 23:16:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 23:16:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 23:16:23,967 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 23:16:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,967 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 23:16:23,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 23:16:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:16:23,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,968 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:23,968 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 27 times [2021-05-02 23:16:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076931558] [2021-05-02 23:16:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,979 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,980 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:24,474 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076931558] [2021-05-02 23:16:24,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076931558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:16:24,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525183726] [2021-05-02 23:16:24,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:16:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:16:24,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:24,476 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,584 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 23:16:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 23:16:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,586 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:16:24,586 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 23:16:24,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 23:16:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 23:16:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 23:16:24,592 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 23:16:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:24,592 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 23:16:24,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 23:16:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:16:24,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:24,593 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:24,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:24,593 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 28 times [2021-05-02 23:16:24,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:24,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475167607] [2021-05-02 23:16:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,600 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,601 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:25,126 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475167607] [2021-05-02 23:16:25,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [475167607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:16:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952287309] [2021-05-02 23:16:25,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:16:25,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:16:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:25,129 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:25,258 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 23:16:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 23:16:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:25,259 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:16:25,259 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 23:16:25,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 23:16:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 23:16:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 23:16:25,265 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 23:16:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:25,266 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 23:16:25,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 23:16:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:16:25,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:25,267 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:25,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:25,267 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:25,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:25,267 INFO L82 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 29 times [2021-05-02 23:16:25,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:25,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436843224] [2021-05-02 23:16:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:25,273 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:25,276 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:25,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436843224] [2021-05-02 23:16:25,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436843224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:16:25,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953637499] [2021-05-02 23:16:25,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:16:25,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:16:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:25,849 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,011 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 23:16:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:16:26,011 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 23:16:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,012 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:16:26,012 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:16:26,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:16:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 23:16:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 23:16:26,018 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 23:16:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,019 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 23:16:26,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 23:16:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:26,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,020 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:26,020 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 30 times [2021-05-02 23:16:26,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956885969] [2021-05-02 23:16:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,028 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,031 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:26,584 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:26,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956885969] [2021-05-02 23:16:26,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956885969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:26,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:26,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:16:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046798070] [2021-05-02 23:16:26,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:16:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:16:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:26,587 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,753 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 23:16:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:16:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,754 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:16:26,755 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 23:16:26,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 23:16:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 23:16:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 23:16:26,761 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 23:16:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,762 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 23:16:26,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 23:16:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:26,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,762 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:26,763 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 31 times [2021-05-02 23:16:26,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403682426] [2021-05-02 23:16:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,769 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,770 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:27,356 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:27,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403682426] [2021-05-02 23:16:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403682426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:16:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687553287] [2021-05-02 23:16:27,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:16:27,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:16:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:27,357 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:27,471 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 23:16:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:16:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 23:16:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:27,472 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:16:27,472 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 23:16:27,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:27,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 23:16:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 23:16:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 23:16:27,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 23:16:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,477 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 23:16:27,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 23:16:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:16:27,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,477 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:27,477 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 32 times [2021-05-02 23:16:27,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151690944] [2021-05-02 23:16:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,486 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,487 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151690944] [2021-05-02 23:16:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151690944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:16:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004776419] [2021-05-02 23:16:28,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:16:28,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:16:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:28,091 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:28,273 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 23:16:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:16:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 23:16:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:28,275 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:16:28,275 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:16:28,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:16:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 23:16:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 23:16:28,282 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 23:16:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:28,282 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 23:16:28,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 23:16:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:28,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:28,282 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:28,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:28,283 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 33 times [2021-05-02 23:16:28,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:28,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717361912] [2021-05-02 23:16:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:28,292 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:28,293 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717361912] [2021-05-02 23:16:28,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [717361912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:16:28,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352397126] [2021-05-02 23:16:28,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:16:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:16:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:28,889 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,048 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 23:16:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:16:29,049 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 23:16:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,049 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:16:29,049 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 23:16:29,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 23:16:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 23:16:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 23:16:29,054 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 23:16:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,054 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 23:16:29,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 23:16:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:16:29,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,055 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:29,055 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 34 times [2021-05-02 23:16:29,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621133885] [2021-05-02 23:16:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,061 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,062 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:29,663 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621133885] [2021-05-02 23:16:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1621133885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:29,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:29,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:29,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473440377] [2021-05-02 23:16:29,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:29,665 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,836 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 23:16:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 23:16:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,837 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:16:29,838 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:16:29,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:16:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 23:16:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 23:16:29,848 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 23:16:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,849 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 23:16:29,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,849 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 23:16:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:16:29,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,849 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:29,850 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 35 times [2021-05-02 23:16:29,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256988999] [2021-05-02 23:16:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,856 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,857 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:30,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256988999] [2021-05-02 23:16:30,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [256988999] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:16:30,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467515588] [2021-05-02 23:16:30,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:16:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:16:30,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:30,491 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:30,668 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 23:16:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:16:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:16:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:30,670 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:16:30,670 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:16:30,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:16:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 23:16:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 23:16:30,674 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 23:16:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,674 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 23:16:30,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 23:16:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 23:16:30,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,675 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:30,675 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 36 times [2021-05-02 23:16:30,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788829462] [2021-05-02 23:16:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,682 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:30,684 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,396 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788829462] [2021-05-02 23:16:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [788829462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:31,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326766482] [2021-05-02 23:16:31,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:31,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:31,399 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,597 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 23:16:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:16:31,597 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 23:16:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,598 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:16:31,598 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 23:16:31,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 644.4ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 23:16:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 23:16:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 23:16:31,602 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 23:16:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,603 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 23:16:31,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 23:16:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:16:31,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,603 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:31,604 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 37 times [2021-05-02 23:16:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553517863] [2021-05-02 23:16:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,609 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,610 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,293 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553517863] [2021-05-02 23:16:32,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553517863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:16:32,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307904924] [2021-05-02 23:16:32,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:16:32,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:16:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:32,295 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,420 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 23:16:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:16:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 23:16:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,422 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:16:32,422 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 23:16:32,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 23:16:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 23:16:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 23:16:32,426 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 23:16:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,426 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 23:16:32,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 23:16:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:16:32,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,426 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:32,427 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 38 times [2021-05-02 23:16:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447100741] [2021-05-02 23:16:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,432 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,433 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,149 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447100741] [2021-05-02 23:16:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447100741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:16:33,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830320790] [2021-05-02 23:16:33,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:16:33,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:16:33,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:33,151 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,337 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 23:16:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:16:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 23:16:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,338 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:16:33,338 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:16:33,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:16:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 23:16:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 23:16:33,343 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 23:16:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,343 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 23:16:33,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 23:16:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:16:33,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,344 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:33,344 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 39 times [2021-05-02 23:16:33,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817090403] [2021-05-02 23:16:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,349 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,350 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,100 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817090403] [2021-05-02 23:16:34,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817090403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:34,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614163634] [2021-05-02 23:16:34,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:34,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:34,101 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,251 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 23:16:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 23:16:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,253 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:16:34,253 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:16:34,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 694.8ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:16:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 23:16:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 23:16:34,262 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 23:16:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,262 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 23:16:34,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 23:16:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:16:34,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,272 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:34,273 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 40 times [2021-05-02 23:16:34,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594885550] [2021-05-02 23:16:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,280 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,281 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594885550] [2021-05-02 23:16:35,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594885550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:16:35,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754867193] [2021-05-02 23:16:35,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:16:35,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:16:35,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:35,068 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,170 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 23:16:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:16:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 23:16:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,172 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:16:35,172 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 23:16:35,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 713.4ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 23:16:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 23:16:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 23:16:35,176 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 23:16:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,176 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 23:16:35,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,177 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 23:16:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:16:35,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,177 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:35,177 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,178 INFO L82 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 41 times [2021-05-02 23:16:35,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118551629] [2021-05-02 23:16:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,183 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,184 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,975 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118551629] [2021-05-02 23:16:35,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [118551629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:16:35,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015655449] [2021-05-02 23:16:35,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:16:35,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:16:35,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:35,977 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,187 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 23:16:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:16:36,188 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 23:16:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,191 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:16:36,191 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 23:16:36,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 23:16:36,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 23:16:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 23:16:36,200 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 23:16:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,201 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 23:16:36,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 23:16:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:16:36,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,203 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:36,203 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 42 times [2021-05-02 23:16:36,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104909986] [2021-05-02 23:16:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,214 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,215 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:37,170 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104909986] [2021-05-02 23:16:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104909986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:16:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662425938] [2021-05-02 23:16:37,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:16:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:16:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:37,172 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,391 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 23:16:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:16:37,392 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 23:16:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,393 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:16:37,393 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 23:16:37,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 23:16:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 23:16:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 23:16:37,397 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 23:16:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,397 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 23:16:37,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 23:16:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:16:37,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,398 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:37,398 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 43 times [2021-05-02 23:16:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558319837] [2021-05-02 23:16:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,404 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:38,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558319837] [2021-05-02 23:16:38,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [558319837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:16:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561422067] [2021-05-02 23:16:38,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:16:38,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:16:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:38,308 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,465 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 23:16:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:16:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 23:16:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,466 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:16:38,466 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 23:16:38,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 842.8ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 23:16:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 23:16:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 23:16:38,470 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 23:16:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,471 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 23:16:38,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 23:16:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:16:38,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,471 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:38,472 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,472 INFO L82 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 44 times [2021-05-02 23:16:38,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037250567] [2021-05-02 23:16:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,477 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,478 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:39,404 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037250567] [2021-05-02 23:16:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037250567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:16:39,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314334762] [2021-05-02 23:16:39,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:16:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:16:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:39,406 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,591 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 23:16:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:16:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 23:16:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,592 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:16:39,592 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:16:39,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 865.0ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:16:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 23:16:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 23:16:39,596 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 23:16:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,596 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 23:16:39,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 23:16:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:39,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,597 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:16:39,597 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 45 times [2021-05-02 23:16:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44807987] [2021-05-02 23:16:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,607 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,608 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:40,584 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44807987] [2021-05-02 23:16:40,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [44807987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:16:40,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677742037] [2021-05-02 23:16:40,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:16:40,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:16:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:40,585 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:40,816 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 23:16:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:16:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:40,817 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:16:40,817 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 23:16:40,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 23:16:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 23:16:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 23:16:40,820 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 23:16:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:40,820 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 23:16:40,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 23:16:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:16:40,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:40,821 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:40,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:16:40,821 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 46 times [2021-05-02 23:16:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:40,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363668496] [2021-05-02 23:16:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:40,836 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:40,838 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:41,851 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:41,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363668496] [2021-05-02 23:16:41,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [363668496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:41,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:41,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:16:41,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822655113] [2021-05-02 23:16:41,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:16:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:16:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:41,852 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:42,051 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 23:16:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:16:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 23:16:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:42,052 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:16:42,052 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 23:16:42,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 940.9ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 23:16:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 23:16:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 23:16:42,056 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 23:16:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:42,056 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 23:16:42,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 23:16:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:16:42,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,057 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:16:42,057 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 47 times [2021-05-02 23:16:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527198284] [2021-05-02 23:16:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,063 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,064 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:43,101 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527198284] [2021-05-02 23:16:43,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527198284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:16:43,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651299358] [2021-05-02 23:16:43,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:16:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:16:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:43,102 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:43,249 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 23:16:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:16:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 23:16:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:43,250 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:16:43,250 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 23:16:43,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 972.2ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 23:16:43,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 23:16:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 23:16:43,254 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 23:16:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:43,254 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 23:16:43,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 23:16:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 23:16:43,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:43,255 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:43,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:16:43,255 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 48 times [2021-05-02 23:16:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:43,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084072831] [2021-05-02 23:16:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:43,260 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:43,261 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:44,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:44,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084072831] [2021-05-02 23:16:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084072831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:44,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:16:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140885546] [2021-05-02 23:16:44,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:16:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:16:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:44,306 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:44,454 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 23:16:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:16:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 23:16:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:44,455 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:16:44,455 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 23:16:44,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 976.0ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 23:16:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 23:16:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 23:16:44,459 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 23:16:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:44,459 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 23:16:44,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 23:16:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:16:44,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:44,459 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:44,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:16:44,460 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 49 times [2021-05-02 23:16:44,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:44,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516311773] [2021-05-02 23:16:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:44,465 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:44,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:45,591 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516311773] [2021-05-02 23:16:45,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [516311773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:16:45,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440951337] [2021-05-02 23:16:45,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:16:45,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:16:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:45,592 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,749 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 23:16:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:16:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 23:16:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,750 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:16:45,750 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 23:16:45,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 23:16:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 23:16:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 23:16:45,754 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 23:16:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,754 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 23:16:45,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 23:16:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 23:16:45,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,755 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:16:45,755 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 50 times [2021-05-02 23:16:45,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025488574] [2021-05-02 23:16:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,760 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,761 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:46,913 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025488574] [2021-05-02 23:16:46,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025488574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:16:46,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907497976] [2021-05-02 23:16:46,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:16:46,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:16:46,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:46,915 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,093 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 23:16:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:16:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 23:16:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,094 INFO L225 Difference]: With dead ends: 122 [2021-05-02 23:16:47,094 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 23:16:47,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1075.1ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 23:16:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 23:16:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 23:16:47,097 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 23:16:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,098 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 23:16:47,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 23:16:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:16:47,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,098 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:16:47,099 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 51 times [2021-05-02 23:16:47,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798636149] [2021-05-02 23:16:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,103 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,104 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:48,270 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798636149] [2021-05-02 23:16:48,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798636149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:16:48,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492530616] [2021-05-02 23:16:48,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:16:48,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:16:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:48,271 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:48,530 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 23:16:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:16:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:16:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:48,531 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:16:48,531 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 23:16:48,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1105.1ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 23:16:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 23:16:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 23:16:48,535 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 23:16:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,535 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 23:16:48,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 23:16:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 23:16:48,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,536 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:16:48,536 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 52 times [2021-05-02 23:16:48,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447848844] [2021-05-02 23:16:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,541 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,542 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:49,803 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:49,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447848844] [2021-05-02 23:16:49,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447848844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:49,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:49,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:16:49,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634685072] [2021-05-02 23:16:49,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:16:49,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:49,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:16:49,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:49,804 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,026 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 23:16:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:16:50,026 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-02 23:16:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,027 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:16:50,027 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 23:16:50,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1197.9ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 23:16:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 23:16:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 23:16:50,030 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 23:16:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:50,031 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 23:16:50,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 23:16:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 23:16:50,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:50,031 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:50,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:16:50,032 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 53 times [2021-05-02 23:16:50,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:50,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777123751] [2021-05-02 23:16:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:50,036 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:50,037 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:51,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777123751] [2021-05-02 23:16:51,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777123751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:16:51,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651187845] [2021-05-02 23:16:51,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:16:51,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:16:51,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:51,328 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:51,562 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 23:16:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:16:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 23:16:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:51,563 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:16:51,563 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 23:16:51,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1226.6ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 23:16:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 23:16:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 23:16:51,567 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 23:16:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:51,567 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 23:16:51,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 23:16:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:16:51,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:51,568 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:51,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:16:51,568 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 54 times [2021-05-02 23:16:51,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:51,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878134678] [2021-05-02 23:16:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:51,573 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:51,574 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:52,876 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:52,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878134678] [2021-05-02 23:16:52,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [878134678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:52,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:52,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:16:52,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685256880] [2021-05-02 23:16:52,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:16:52,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:16:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:52,877 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:53,054 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 23:16:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:16:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 23:16:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:53,056 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:16:53,056 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 23:16:53,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1238.5ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 23:16:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 23:16:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 23:16:53,060 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 23:16:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:53,060 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 23:16:53,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 23:16:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 23:16:53,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:53,061 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:53,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:16:53,061 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 55 times [2021-05-02 23:16:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:53,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980669448] [2021-05-02 23:16:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:53,067 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:53,068 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:54,449 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980669448] [2021-05-02 23:16:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [980669448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:54,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:54,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:16:54,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264035962] [2021-05-02 23:16:54,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:16:54,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:16:54,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:54,450 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:54,705 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 23:16:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:16:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 23:16:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:54,707 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:16:54,707 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 23:16:54,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1309.8ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 23:16:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 23:16:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 23:16:54,709 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 23:16:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:54,710 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 23:16:54,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 23:16:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 23:16:54,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:54,711 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:54,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:16:54,711 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 56 times [2021-05-02 23:16:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:54,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132562432] [2021-05-02 23:16:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:54,717 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:54,718 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:56,154 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:56,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132562432] [2021-05-02 23:16:56,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132562432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:56,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:56,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:16:56,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926005293] [2021-05-02 23:16:56,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:16:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:56,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:16:56,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:16:56,155 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:56,326 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 23:16:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:16:56,327 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 23:16:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:56,327 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:16:56,327 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 23:16:56,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1352.3ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:16:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 23:16:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 23:16:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 23:16:56,331 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 23:16:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:56,331 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 23:16:56,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 23:16:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:16:56,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:56,332 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:56,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:16:56,332 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 57 times [2021-05-02 23:16:56,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:56,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808877537] [2021-05-02 23:16:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:56,337 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:56,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:57,752 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:57,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808877537] [2021-05-02 23:16:57,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [808877537] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:57,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:57,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:16:57,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860296355] [2021-05-02 23:16:57,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:16:57,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:57,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:16:57,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:16:57,753 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:57,999 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 23:16:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:16:58,000 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 23:16:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:58,000 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:16:58,000 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 23:16:58,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1342.8ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:16:58,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 23:16:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 23:16:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 23:16:58,004 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 23:16:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:58,004 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 23:16:58,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 23:16:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 23:16:58,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:58,005 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:58,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:16:58,005 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 58 times [2021-05-02 23:16:58,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:58,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53950525] [2021-05-02 23:16:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:58,012 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:58,013 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:59,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:59,562 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:59,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53950525] [2021-05-02 23:16:59,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [53950525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:59,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:59,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:16:59,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248801623] [2021-05-02 23:16:59,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:16:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:59,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:16:59,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:16:59,563 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:59,814 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 23:16:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:16:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-02 23:16:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:59,815 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:16:59,815 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 23:16:59,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1475.1ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:16:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 23:16:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 23:16:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 23:16:59,818 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 23:16:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:59,819 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 23:16:59,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 23:16:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:16:59,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:59,819 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:59,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:16:59,820 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:59,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 59 times [2021-05-02 23:16:59,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:59,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615165515] [2021-05-02 23:16:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:59,826 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:59,827 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:01,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:01,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615165515] [2021-05-02 23:17:01,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615165515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:01,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:01,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:17:01,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359007194] [2021-05-02 23:17:01,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:17:01,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:01,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:17:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:01,440 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:01,610 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 23:17:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:17:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 23:17:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:01,611 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:17:01,612 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 23:17:01,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1536.7ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 23:17:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-02 23:17:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-02 23:17:01,615 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-02 23:17:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:01,615 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-02 23:17:01,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-02 23:17:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 23:17:01,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:01,616 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:01,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:17:01,617 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 60 times [2021-05-02 23:17:01,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:01,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72437507] [2021-05-02 23:17:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:01,621 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:01,622 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:03,196 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72437507] [2021-05-02 23:17:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [72437507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:03,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:03,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:17:03,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650693170] [2021-05-02 23:17:03,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:17:03,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:17:03,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:03,197 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:03,503 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 23:17:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:17:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-02 23:17:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:03,505 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:17:03,505 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 23:17:03,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1500.6ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 23:17:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-02 23:17:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-02 23:17:03,523 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-02 23:17:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:03,523 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-02 23:17:03,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-02 23:17:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:17:03,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:03,525 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:03,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:17:03,525 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 61 times [2021-05-02 23:17:03,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:03,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975830216] [2021-05-02 23:17:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:03,529 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:03,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:05,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:05,229 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:05,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975830216] [2021-05-02 23:17:05,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [975830216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:05,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:05,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:17:05,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220743804] [2021-05-02 23:17:05,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:17:05,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:17:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:05,230 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:05,491 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 23:17:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:17:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-02 23:17:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:05,492 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:17:05,492 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 23:17:05,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1608.7ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 23:17:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 23:17:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-02 23:17:05,496 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-02 23:17:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:05,496 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-02 23:17:05,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-02 23:17:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 23:17:05,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:05,497 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:05,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:17:05,497 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 62 times [2021-05-02 23:17:05,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:05,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67301544] [2021-05-02 23:17:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:05,503 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:05,504 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:07,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:07,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:07,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67301544] [2021-05-02 23:17:07,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [67301544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:07,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:07,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:17:07,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822130122] [2021-05-02 23:17:07,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:17:07,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:07,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:17:07,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:07,199 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:07,470 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 23:17:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:17:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-02 23:17:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:07,471 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:17:07,472 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 23:17:07,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1617.2ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 23:17:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-02 23:17:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-02 23:17:07,475 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-02 23:17:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:07,475 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-02 23:17:07,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-02 23:17:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 23:17:07,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:07,476 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:07,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:17:07,476 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 63 times [2021-05-02 23:17:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:07,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235602069] [2021-05-02 23:17:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:07,483 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:07,483 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:09,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:09,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235602069] [2021-05-02 23:17:09,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [235602069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:09,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:09,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:17:09,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311757684] [2021-05-02 23:17:09,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:17:09,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:17:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:09,210 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:09,495 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 23:17:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:17:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-02 23:17:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:09,496 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:17:09,496 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 23:17:09,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1650.2ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 23:17:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-02 23:17:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-02 23:17:09,500 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-02 23:17:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:09,500 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-02 23:17:09,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-02 23:17:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:17:09,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:09,501 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:09,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:17:09,501 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 64 times [2021-05-02 23:17:09,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:09,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914532903] [2021-05-02 23:17:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:09,511 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:09,512 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:11,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:11,283 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914532903] [2021-05-02 23:17:11,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914532903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:11,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:11,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:11,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228780782] [2021-05-02 23:17:11,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:11,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:11,285 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,572 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 23:17:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-02 23:17:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,573 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:17:11,573 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 23:17:11,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1698.5ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 23:17:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-05-02 23:17:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-02 23:17:11,577 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-02 23:17:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,577 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-02 23:17:11,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-02 23:17:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 23:17:11,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,578 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:17:11,578 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,579 INFO L82 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 65 times [2021-05-02 23:17:11,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184498893] [2021-05-02 23:17:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,595 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:11,596 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:13,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184498893] [2021-05-02 23:17:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184498893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:13,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:13,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:17:13,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251701368] [2021-05-02 23:17:13,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:17:13,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:13,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:17:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:13,421 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:13,703 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-02 23:17:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:13,703 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 23:17:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:13,704 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:17:13,704 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 23:17:13,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1743.8ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 23:17:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 23:17:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-02 23:17:13,707 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-02 23:17:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:13,707 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-02 23:17:13,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-02 23:17:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 23:17:13,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:13,708 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:13,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:17:13,708 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 66 times [2021-05-02 23:17:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:13,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942284899] [2021-05-02 23:17:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:13,720 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:13,721 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:15,583 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:15,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942284899] [2021-05-02 23:17:15,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [942284899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:15,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:15,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:17:15,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955506625] [2021-05-02 23:17:15,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:17:15,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:15,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:17:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:15,584 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:15,769 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-02 23:17:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:17:15,770 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-02 23:17:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:15,770 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:17:15,770 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 23:17:15,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1786.3ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 23:17:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-02 23:17:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-02 23:17:15,774 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-02 23:17:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:15,774 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-02 23:17:15,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-02 23:17:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 23:17:15,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:15,775 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:15,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:17:15,775 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1034597152, now seen corresponding path program 67 times [2021-05-02 23:17:15,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:15,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89967321] [2021-05-02 23:17:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:15,780 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:15,780 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:17,705 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89967321] [2021-05-02 23:17:17,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [89967321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:17:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410965056] [2021-05-02 23:17:17,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:17:17,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:17:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:17,707 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:18,004 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-02 23:17:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:17:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-02 23:17:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:18,005 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:17:18,005 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 23:17:18,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1844.7ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 23:17:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-02 23:17:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-05-02 23:17:18,009 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-05-02 23:17:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:18,009 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-05-02 23:17:18,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-05-02 23:17:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:17:18,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:18,010 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:18,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:17:18,010 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1236330306, now seen corresponding path program 68 times [2021-05-02 23:17:18,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:18,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598369932] [2021-05-02 23:17:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:18,015 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:18,016 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:20,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:20,026 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:20,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598369932] [2021-05-02 23:17:20,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598369932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:20,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:20,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:20,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979755533] [2021-05-02 23:17:20,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:20,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:20,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:20,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:20,027 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:20,348 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-02 23:17:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-02 23:17:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:20,351 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:17:20,351 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 23:17:20,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1934.6ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 23:17:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-02 23:17:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-05-02 23:17:20,354 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-05-02 23:17:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:20,354 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-05-02 23:17:20,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-05-02 23:17:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:17:20,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:20,355 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:20,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:17:20,355 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:20,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1828362980, now seen corresponding path program 69 times [2021-05-02 23:17:20,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:20,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183629047] [2021-05-02 23:17:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:20,360 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:20,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:22,436 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:22,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183629047] [2021-05-02 23:17:22,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183629047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:22,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:22,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:17:22,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317454626] [2021-05-02 23:17:22,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:17:22,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:17:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:22,437 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:22,656 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-02 23:17:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:17:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-02 23:17:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:22,657 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:17:22,657 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 23:17:22,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1999.1ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 23:17:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-02 23:17:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-05-02 23:17:22,660 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-05-02 23:17:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:22,660 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-05-02 23:17:22,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-05-02 23:17:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 23:17:22,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:22,661 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:22,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:17:22,661 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:22,661 INFO L82 PathProgramCache]: Analyzing trace with hash -458887674, now seen corresponding path program 70 times [2021-05-02 23:17:22,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:22,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217058636] [2021-05-02 23:17:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:22,664 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:22,665 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:24,772 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:24,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217058636] [2021-05-02 23:17:24,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217058636] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:24,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:24,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:17:24,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618635954] [2021-05-02 23:17:24,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:17:24,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:17:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:24,774 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:25,120 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-02 23:17:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:17:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-05-02 23:17:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:25,121 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:17:25,121 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:17:25,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2032.6ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:17:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-02 23:17:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-05-02 23:17:25,125 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-05-02 23:17:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:25,125 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-05-02 23:17:25,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-05-02 23:17:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 23:17:25,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:25,126 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:25,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:17:25,126 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 516489384, now seen corresponding path program 71 times [2021-05-02 23:17:25,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:25,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327618016] [2021-05-02 23:17:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:25,131 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:25,135 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:27,271 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:27,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327618016] [2021-05-02 23:17:27,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327618016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:27,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:27,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:17:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879402964] [2021-05-02 23:17:27,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:17:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:17:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:27,272 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:27,491 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-02 23:17:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:17:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-05-02 23:17:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:27,492 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:17:27,492 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 23:17:27,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2061.4ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 23:17:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-05-02 23:17:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-05-02 23:17:27,496 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-05-02 23:17:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:27,496 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-05-02 23:17:27,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-05-02 23:17:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 23:17:27,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:27,497 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:27,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:17:27,497 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1550971594, now seen corresponding path program 72 times [2021-05-02 23:17:27,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:27,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420449977] [2021-05-02 23:17:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:27,502 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:27,503 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:29,695 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:29,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420449977] [2021-05-02 23:17:29,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420449977] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:29,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:29,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:29,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756797374] [2021-05-02 23:17:29,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:29,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:29,696 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:30,040 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-02 23:17:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2021-05-02 23:17:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:30,041 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:17:30,041 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 23:17:30,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2113.7ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 23:17:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-05-02 23:17:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-05-02 23:17:30,044 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-05-02 23:17:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:30,045 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-05-02 23:17:30,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-05-02 23:17:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 23:17:30,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:30,045 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:30,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:17:30,046 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash -744037268, now seen corresponding path program 73 times [2021-05-02 23:17:30,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:30,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111524705] [2021-05-02 23:17:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:30,050 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:30,051 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:32,315 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:32,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111524705] [2021-05-02 23:17:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111524705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:32,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:32,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:17:32,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984993474] [2021-05-02 23:17:32,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:17:32,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:17:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:32,317 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:32,653 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-02 23:17:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:17:32,653 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-05-02 23:17:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:32,654 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:17:32,654 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 23:17:32,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2189.2ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 23:17:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-05-02 23:17:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-05-02 23:17:32,658 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-05-02 23:17:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:32,658 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-05-02 23:17:32,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-05-02 23:17:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 23:17:32,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:32,659 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:32,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:17:32,659 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1365636494, now seen corresponding path program 74 times [2021-05-02 23:17:32,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:32,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56178327] [2021-05-02 23:17:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:32,664 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:32,665 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:35,015 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:35,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56178327] [2021-05-02 23:17:35,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [56178327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:35,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:35,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:17:35,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788566639] [2021-05-02 23:17:35,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:17:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:17:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:35,017 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:35,292 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-02 23:17:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:17:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-02 23:17:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:35,293 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:17:35,293 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:17:35,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2270.5ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:17:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-05-02 23:17:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-05-02 23:17:35,297 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-05-02 23:17:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:35,297 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-05-02 23:17:35,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-05-02 23:17:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:17:35,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:35,298 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:35,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:17:35,299 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1537558064, now seen corresponding path program 75 times [2021-05-02 23:17:35,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:35,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115841976] [2021-05-02 23:17:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:35,304 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:35,305 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:37,722 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:37,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115841976] [2021-05-02 23:17:37,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115841976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:37,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:37,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:17:37,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234419108] [2021-05-02 23:17:37,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:17:37,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:17:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:37,724 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:37,951 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-02 23:17:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:17:37,951 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2021-05-02 23:17:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:37,952 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:17:37,952 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 23:17:37,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2340.0ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 23:17:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-05-02 23:17:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-05-02 23:17:37,955 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-05-02 23:17:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:37,955 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-05-02 23:17:37,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-05-02 23:17:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 23:17:37,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:37,956 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:37,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:17:37,957 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash -749537710, now seen corresponding path program 76 times [2021-05-02 23:17:37,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:37,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304699646] [2021-05-02 23:17:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:37,967 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:37,968 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:40,442 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:40,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304699646] [2021-05-02 23:17:40,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [304699646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:40,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:40,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:17:40,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850009287] [2021-05-02 23:17:40,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:17:40,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:40,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:17:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:40,444 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:40,664 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-02 23:17:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:17:40,664 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-02 23:17:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:40,665 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:17:40,665 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 23:17:40,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2383.1ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 23:17:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-05-02 23:17:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-05-02 23:17:40,668 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-05-02 23:17:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:40,668 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-05-02 23:17:40,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-05-02 23:17:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 23:17:40,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:40,669 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:40,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:17:40,669 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash 374679028, now seen corresponding path program 77 times [2021-05-02 23:17:40,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:40,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955846737] [2021-05-02 23:17:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:40,674 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:40,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:43,216 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955846737] [2021-05-02 23:17:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955846737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:43,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:43,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:17:43,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885013507] [2021-05-02 23:17:43,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:17:43,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:43,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:17:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:43,217 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:43,455 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-02 23:17:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:17:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-02 23:17:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:43,456 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:17:43,456 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 23:17:43,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2458.2ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 23:17:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-05-02 23:17:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-05-02 23:17:43,460 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-05-02 23:17:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:43,460 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-05-02 23:17:43,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-05-02 23:17:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-02 23:17:43,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:43,461 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:43,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:17:43,461 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1584794346, now seen corresponding path program 78 times [2021-05-02 23:17:43,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:43,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109198433] [2021-05-02 23:17:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:43,465 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:43,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:46,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:46,059 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:46,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109198433] [2021-05-02 23:17:46,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109198433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:46,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:46,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:17:46,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065608410] [2021-05-02 23:17:46,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:17:46,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:17:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:17:46,061 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:46,345 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-02 23:17:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:17:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-05-02 23:17:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:46,347 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:17:46,347 INFO L226 Difference]: Without dead ends: 172 [2021-05-02 23:17:46,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2521.0ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:17:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-02 23:17:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-05-02 23:17:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-05-02 23:17:46,350 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-05-02 23:17:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:46,351 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-05-02 23:17:46,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-05-02 23:17:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:17:46,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:46,352 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:46,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:17:46,352 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash 851936184, now seen corresponding path program 79 times [2021-05-02 23:17:46,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:46,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452851168] [2021-05-02 23:17:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:46,357 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:46,358 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:49,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:49,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452851168] [2021-05-02 23:17:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [452851168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:49,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:49,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:17:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132366954] [2021-05-02 23:17:49,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:17:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:17:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:17:49,068 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:49,328 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-02 23:17:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:17:49,329 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-02 23:17:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:49,329 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:17:49,329 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 23:17:49,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2623.1ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:17:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 23:17:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-05-02 23:17:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-05-02 23:17:49,335 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-05-02 23:17:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:49,336 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-05-02 23:17:49,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-05-02 23:17:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 23:17:49,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:49,343 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:49,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:17:49,343 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1792799194, now seen corresponding path program 80 times [2021-05-02 23:17:49,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:49,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69336284] [2021-05-02 23:17:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:49,348 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:49,349 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:52,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:52,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:52,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69336284] [2021-05-02 23:17:52,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [69336284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:52,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:52,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:17:52,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698035574] [2021-05-02 23:17:52,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:17:52,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:17:52,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:17:52,096 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:52,435 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-02 23:17:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:17:52,435 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2021-05-02 23:17:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:52,436 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:17:52,436 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 23:17:52,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2636.9ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:17:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 23:17:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-05-02 23:17:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-05-02 23:17:52,439 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-05-02 23:17:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:52,439 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-05-02 23:17:52,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-05-02 23:17:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-02 23:17:52,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:52,440 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:52,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:17:52,440 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash -275947652, now seen corresponding path program 81 times [2021-05-02 23:17:52,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:52,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517417874] [2021-05-02 23:17:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:52,452 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:52,453 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:55,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:55,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:55,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517417874] [2021-05-02 23:17:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517417874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:55,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:55,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:17:55,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064360558] [2021-05-02 23:17:55,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:17:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:17:55,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:17:55,263 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:55,705 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-02 23:17:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:17:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2021-05-02 23:17:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:55,706 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:17:55,707 INFO L226 Difference]: Without dead ends: 178 [2021-05-02 23:17:55,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2725.7ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:17:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-02 23:17:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-05-02 23:17:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-05-02 23:17:55,711 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-05-02 23:17:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:55,711 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-05-02 23:17:55,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-05-02 23:17:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 23:17:55,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:55,712 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:55,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:17:55,712 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash 228191390, now seen corresponding path program 82 times [2021-05-02 23:17:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126623277] [2021-05-02 23:17:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:55,717 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:55,718 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:58,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:58,621 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:58,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126623277] [2021-05-02 23:17:58,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [126623277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:58,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:58,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:17:58,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642903310] [2021-05-02 23:17:58,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:17:58,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:17:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:17:58,623 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:58,875 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-02 23:17:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:17:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2021-05-02 23:17:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:58,876 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:17:58,876 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 23:17:58,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2811.4ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:17:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 23:17:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-02 23:17:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-05-02 23:17:58,879 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-05-02 23:17:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:58,879 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-05-02 23:17:58,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-05-02 23:17:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 23:17:58,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:58,880 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:58,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:17:58,880 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash -625493696, now seen corresponding path program 83 times [2021-05-02 23:17:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:58,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153200439] [2021-05-02 23:17:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:58,895 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:58,896 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:01,885 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:01,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153200439] [2021-05-02 23:18:01,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153200439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:01,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:01,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:18:01,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811855437] [2021-05-02 23:18:01,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:18:01,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:18:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:01,887 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:02,242 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-02 23:18:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:18:02,242 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2021-05-02 23:18:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:02,243 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:18:02,243 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 23:18:02,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2897.5ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 23:18:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-05-02 23:18:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-05-02 23:18:02,247 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-05-02 23:18:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:02,248 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-05-02 23:18:02,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-05-02 23:18:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 23:18:02,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:02,249 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:02,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:18:02,249 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:02,249 INFO L82 PathProgramCache]: Analyzing trace with hash -678107806, now seen corresponding path program 84 times [2021-05-02 23:18:02,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:02,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744178246] [2021-05-02 23:18:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:02,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:02,256 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:05,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744178246] [2021-05-02 23:18:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744178246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:05,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:05,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661235527] [2021-05-02 23:18:05,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:05,481 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:05,893 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-02 23:18:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-02 23:18:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:05,895 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:18:05,895 INFO L226 Difference]: Without dead ends: 184 [2021-05-02 23:18:05,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3131.4ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-02 23:18:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-05-02 23:18:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-05-02 23:18:05,899 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-05-02 23:18:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:05,899 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-05-02 23:18:05,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-05-02 23:18:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-02 23:18:05,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:05,900 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:05,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:18:05,900 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 299340036, now seen corresponding path program 85 times [2021-05-02 23:18:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:05,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968826234] [2021-05-02 23:18:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:05,911 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:05,912 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:09,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:09,064 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:09,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968826234] [2021-05-02 23:18:09,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [968826234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:09,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:09,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:18:09,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062194143] [2021-05-02 23:18:09,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:18:09,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:18:09,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:09,065 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:09,424 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-02 23:18:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:18:09,425 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2021-05-02 23:18:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:09,425 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:18:09,425 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 23:18:09,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3039.3ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 23:18:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-02 23:18:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-05-02 23:18:09,429 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-05-02 23:18:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:09,430 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-05-02 23:18:09,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-05-02 23:18:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-02 23:18:09,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:09,431 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:09,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:18:09,431 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:09,431 INFO L82 PathProgramCache]: Analyzing trace with hash -971121626, now seen corresponding path program 86 times [2021-05-02 23:18:09,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:09,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449409196] [2021-05-02 23:18:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:09,436 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:09,437 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:12,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:12,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449409196] [2021-05-02 23:18:12,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [449409196] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:12,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:12,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:18:12,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783377371] [2021-05-02 23:18:12,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:18:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:18:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:12,629 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:12,905 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-02 23:18:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:18:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2021-05-02 23:18:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:12,906 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:18:12,906 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 23:18:12,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3099.3ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 23:18:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-05-02 23:18:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-05-02 23:18:12,909 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-05-02 23:18:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:12,909 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-05-02 23:18:12,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-05-02 23:18:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 23:18:12,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:12,910 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:12,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:18:12,910 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2114066744, now seen corresponding path program 87 times [2021-05-02 23:18:12,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:12,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337878855] [2021-05-02 23:18:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:12,914 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:12,915 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:16,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337878855] [2021-05-02 23:18:16,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [337878855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:16,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:16,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:18:16,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701231997] [2021-05-02 23:18:16,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:18:16,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:18:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:16,192 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:16,644 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-02 23:18:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:18:16,644 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2021-05-02 23:18:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:16,645 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:18:16,645 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 23:18:16,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3184.5ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 23:18:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-05-02 23:18:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-05-02 23:18:16,648 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-05-02 23:18:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:16,648 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-05-02 23:18:16,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-05-02 23:18:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 23:18:16,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:16,649 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:16,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:18:16,649 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash -972697366, now seen corresponding path program 88 times [2021-05-02 23:18:16,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:16,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752621862] [2021-05-02 23:18:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:16,653 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:16,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:20,047 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:20,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752621862] [2021-05-02 23:18:20,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [752621862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:20,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:20,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:20,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436628325] [2021-05-02 23:18:20,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:20,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:20,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:20,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:20,048 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:20,493 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-02 23:18:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2021-05-02 23:18:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:20,495 INFO L225 Difference]: With dead ends: 198 [2021-05-02 23:18:20,495 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 23:18:20,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3303.9ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 23:18:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-05-02 23:18:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-05-02 23:18:20,498 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-05-02 23:18:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:20,499 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-05-02 23:18:20,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-05-02 23:18:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:18:20,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:20,500 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:20,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:18:20,500 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash 666614412, now seen corresponding path program 89 times [2021-05-02 23:18:20,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:20,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227086451] [2021-05-02 23:18:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:20,509 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:20,510 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:24,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:24,017 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:24,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227086451] [2021-05-02 23:18:24,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [227086451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:24,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:24,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:18:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729716343] [2021-05-02 23:18:24,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:18:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:18:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:24,018 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:24,371 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-02 23:18:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:18:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-05-02 23:18:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:24,372 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:18:24,372 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 23:18:24,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3407.2ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 23:18:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-02 23:18:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-05-02 23:18:24,377 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-05-02 23:18:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:24,377 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-05-02 23:18:24,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-05-02 23:18:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-02 23:18:24,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:24,378 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:24,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:18:24,378 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -207764562, now seen corresponding path program 90 times [2021-05-02 23:18:24,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:24,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653953916] [2021-05-02 23:18:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:24,383 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:24,384 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:28,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:28,028 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:28,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653953916] [2021-05-02 23:18:28,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653953916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:28,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:28,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:18:28,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743677089] [2021-05-02 23:18:28,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:18:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:28,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:18:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:28,030 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:28,369 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-02 23:18:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:18:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2021-05-02 23:18:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:28,370 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:18:28,370 INFO L226 Difference]: Without dead ends: 196 [2021-05-02 23:18:28,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3543.1ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-02 23:18:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-05-02 23:18:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-05-02 23:18:28,375 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-05-02 23:18:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:28,375 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-05-02 23:18:28,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-05-02 23:18:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 23:18:28,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:28,376 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:28,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:18:28,376 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1327631440, now seen corresponding path program 91 times [2021-05-02 23:18:28,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:28,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347328128] [2021-05-02 23:18:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:28,381 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:28,382 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:32,144 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:32,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347328128] [2021-05-02 23:18:32,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347328128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:32,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:32,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:18:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106432188] [2021-05-02 23:18:32,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:18:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:18:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:32,145 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:32,473 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-05-02 23:18:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:18:32,474 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2021-05-02 23:18:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:32,475 INFO L225 Difference]: With dead ends: 204 [2021-05-02 23:18:32,475 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 23:18:32,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3641.2ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 23:18:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-05-02 23:18:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-05-02 23:18:32,478 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-05-02 23:18:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:32,478 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-05-02 23:18:32,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-05-02 23:18:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 23:18:32,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:32,479 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:32,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:18:32,479 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -625560462, now seen corresponding path program 92 times [2021-05-02 23:18:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:32,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271792123] [2021-05-02 23:18:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:32,483 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:32,484 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:36,298 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:36,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271792123] [2021-05-02 23:18:36,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271792123] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:36,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:36,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:18:36,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560222129] [2021-05-02 23:18:36,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:18:36,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:36,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:18:36,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:36,299 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:36,644 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-05-02 23:18:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:18:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2021-05-02 23:18:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:36,645 INFO L225 Difference]: With dead ends: 206 [2021-05-02 23:18:36,645 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 23:18:36,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3717.2ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 23:18:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-05-02 23:18:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-05-02 23:18:36,649 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-05-02 23:18:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:36,650 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-05-02 23:18:36,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-05-02 23:18:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-02 23:18:36,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:36,651 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:36,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:18:36,651 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:36,651 INFO L82 PathProgramCache]: Analyzing trace with hash -742269932, now seen corresponding path program 93 times [2021-05-02 23:18:36,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:36,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680808576] [2021-05-02 23:18:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:36,656 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:36,657 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:40,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:40,599 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:40,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680808576] [2021-05-02 23:18:40,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [680808576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:40,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:40,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:18:40,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406960164] [2021-05-02 23:18:40,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:18:40,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:18:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:18:40,601 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:40,984 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-05-02 23:18:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:18:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2021-05-02 23:18:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:40,985 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:18:40,986 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 23:18:40,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3842.4ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:18:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 23:18:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-05-02 23:18:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-05-02 23:18:40,989 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-05-02 23:18:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:40,989 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-05-02 23:18:40,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-05-02 23:18:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 23:18:40,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:40,990 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:40,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:18:40,990 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1230920906, now seen corresponding path program 94 times [2021-05-02 23:18:40,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:40,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147267382] [2021-05-02 23:18:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:40,994 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:40,995 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:45,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:45,039 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:45,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147267382] [2021-05-02 23:18:45,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2147267382] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:45,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:45,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:18:45,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986158530] [2021-05-02 23:18:45,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:18:45,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:18:45,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:18:45,041 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:45,550 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-05-02 23:18:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:18:45,551 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-02 23:18:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:45,552 INFO L225 Difference]: With dead ends: 210 [2021-05-02 23:18:45,552 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 23:18:45,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3952.3ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:18:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 23:18:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-05-02 23:18:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-05-02 23:18:45,556 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-05-02 23:18:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:45,557 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-05-02 23:18:45,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-05-02 23:18:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 23:18:45,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:45,558 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:45,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:18:45,558 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1621895640, now seen corresponding path program 95 times [2021-05-02 23:18:45,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:45,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170851789] [2021-05-02 23:18:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:45,566 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:45,567 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:49,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:49,631 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170851789] [2021-05-02 23:18:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [170851789] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:49,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:49,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:18:49,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307301708] [2021-05-02 23:18:49,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:18:49,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:18:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:18:49,633 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:50,203 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-05-02 23:18:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:18:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-02 23:18:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:50,204 INFO L225 Difference]: With dead ends: 212 [2021-05-02 23:18:50,204 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 23:18:50,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3959.4ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:18:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 23:18:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-05-02 23:18:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-05-02 23:18:50,208 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-05-02 23:18:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:50,208 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-05-02 23:18:50,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-05-02 23:18:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 23:18:50,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:50,209 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:50,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:18:50,210 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1305505798, now seen corresponding path program 96 times [2021-05-02 23:18:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:50,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181461242] [2021-05-02 23:18:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:50,216 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:50,217 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:54,422 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:54,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181461242] [2021-05-02 23:18:54,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [181461242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:54,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:54,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:18:54,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035617208] [2021-05-02 23:18:54,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:18:54,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:18:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:54,425 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:54,928 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-05-02 23:18:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:18:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-02 23:18:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:54,929 INFO L225 Difference]: With dead ends: 214 [2021-05-02 23:18:54,929 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 23:18:54,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4091.1ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 23:18:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-05-02 23:18:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-05-02 23:18:54,934 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-05-02 23:18:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:54,934 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-05-02 23:18:54,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-05-02 23:18:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 23:18:54,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:54,935 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:54,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:18:54,935 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1334708836, now seen corresponding path program 97 times [2021-05-02 23:18:54,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:54,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866233293] [2021-05-02 23:18:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:54,940 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:54,941 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:59,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:59,373 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:59,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866233293] [2021-05-02 23:18:59,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866233293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:59,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:59,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:18:59,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282217016] [2021-05-02 23:18:59,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:18:59,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:59,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:18:59,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:18:59,375 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:59,816 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-05-02 23:18:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:18:59,817 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-02 23:18:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:59,817 INFO L225 Difference]: With dead ends: 216 [2021-05-02 23:18:59,817 INFO L226 Difference]: Without dead ends: 210 [2021-05-02 23:18:59,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4317.5ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:18:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-02 23:18:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-02 23:18:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-05-02 23:18:59,821 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-05-02 23:18:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:59,821 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-05-02 23:18:59,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-05-02 23:18:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 23:18:59,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:59,822 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:59,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:18:59,822 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash 665942718, now seen corresponding path program 98 times [2021-05-02 23:18:59,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:59,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497325770] [2021-05-02 23:18:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:59,831 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:59,832 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:04,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:04,466 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497325770] [2021-05-02 23:19:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [497325770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:04,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:04,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:19:04,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556958683] [2021-05-02 23:19:04,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:19:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:04,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:19:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:04,469 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:04,890 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-05-02 23:19:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:19:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-02 23:19:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:04,891 INFO L225 Difference]: With dead ends: 218 [2021-05-02 23:19:04,891 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 23:19:04,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4527.8ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 23:19:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-05-02 23:19:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-05-02 23:19:04,896 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-05-02 23:19:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:04,896 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-05-02 23:19:04,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-05-02 23:19:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 23:19:04,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:04,897 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:04,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:19:04,898 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash -853262496, now seen corresponding path program 99 times [2021-05-02 23:19:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:04,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087665550] [2021-05-02 23:19:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:04,904 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:04,905 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:09,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:09,362 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:09,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087665550] [2021-05-02 23:19:09,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087665550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:09,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:09,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:19:09,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192455655] [2021-05-02 23:19:09,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:19:09,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:19:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:09,366 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:09,971 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-05-02 23:19:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:19:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2021-05-02 23:19:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:09,973 INFO L225 Difference]: With dead ends: 220 [2021-05-02 23:19:09,973 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 23:19:09,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4353.9ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 23:19:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-05-02 23:19:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-05-02 23:19:09,978 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-05-02 23:19:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:09,978 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-05-02 23:19:09,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-05-02 23:19:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-02 23:19:09,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:09,979 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:09,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:19:09,979 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash -520592510, now seen corresponding path program 100 times [2021-05-02 23:19:09,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:09,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687789068] [2021-05-02 23:19:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:09,987 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:09,988 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:14,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:14,953 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687789068] [2021-05-02 23:19:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687789068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:14,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:14,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:19:14,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777293181] [2021-05-02 23:19:14,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:19:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:19:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:14,956 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:15,595 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-05-02 23:19:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:19:15,596 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2021-05-02 23:19:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:15,596 INFO L225 Difference]: With dead ends: 222 [2021-05-02 23:19:15,596 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 23:19:15,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4838.3ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 23:19:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-05-02 23:19:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-05-02 23:19:15,601 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-05-02 23:19:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:15,601 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-05-02 23:19:15,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-05-02 23:19:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-02 23:19:15,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:15,602 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:15,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:19:15,602 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1347684132, now seen corresponding path program 101 times [2021-05-02 23:19:15,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:15,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673324735] [2021-05-02 23:19:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:15,607 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:15,608 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:20,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:20,635 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:20,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673324735] [2021-05-02 23:19:20,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673324735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:20,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:20,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:19:20,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865181856] [2021-05-02 23:19:20,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:19:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:19:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:20,637 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:21,339 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-05-02 23:19:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:19:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2021-05-02 23:19:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:21,340 INFO L225 Difference]: With dead ends: 224 [2021-05-02 23:19:21,340 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 23:19:21,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4916.2ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 23:19:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 23:19:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-05-02 23:19:21,344 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-05-02 23:19:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:21,345 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-05-02 23:19:21,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-05-02 23:19:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-02 23:19:21,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:21,346 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:21,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:19:21,346 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1465207366, now seen corresponding path program 102 times [2021-05-02 23:19:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:21,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073009936] [2021-05-02 23:19:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:21,350 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:21,351 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:26,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:26,237 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073009936] [2021-05-02 23:19:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073009936] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:26,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:26,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:19:26,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225650845] [2021-05-02 23:19:26,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:19:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:19:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:26,239 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:26,824 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-05-02 23:19:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:19:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2021-05-02 23:19:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:26,825 INFO L225 Difference]: With dead ends: 226 [2021-05-02 23:19:26,825 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 23:19:26,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4785.0ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 23:19:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-05-02 23:19:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-05-02 23:19:26,829 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-05-02 23:19:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:26,829 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-05-02 23:19:26,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-05-02 23:19:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 23:19:26,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:26,830 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:26,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:19:26,830 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:26,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1559081752, now seen corresponding path program 103 times [2021-05-02 23:19:26,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:26,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364500138] [2021-05-02 23:19:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:26,835 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:26,836 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:32,304 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:32,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364500138] [2021-05-02 23:19:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [364500138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:32,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:32,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:19:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631274262] [2021-05-02 23:19:32,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:19:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:19:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:19:32,306 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:32,798 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-05-02 23:19:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:19:32,799 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2021-05-02 23:19:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:32,799 INFO L225 Difference]: With dead ends: 228 [2021-05-02 23:19:32,799 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 23:19:32,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 5332.0ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:19:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 23:19:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-02 23:19:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-05-02 23:19:32,803 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-05-02 23:19:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:32,803 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-05-02 23:19:32,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-05-02 23:19:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 23:19:32,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:32,804 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:32,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:19:32,804 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:32,805 INFO L82 PathProgramCache]: Analyzing trace with hash -208064758, now seen corresponding path program 104 times [2021-05-02 23:19:32,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:32,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545124625] [2021-05-02 23:19:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:32,812 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:32,813 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:38,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:38,575 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:38,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545124625] [2021-05-02 23:19:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545124625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:38,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:38,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:19:38,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181573254] [2021-05-02 23:19:38,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:19:38,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:38,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:19:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:19:38,578 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:39,092 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-05-02 23:19:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:19:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2021-05-02 23:19:39,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:39,093 INFO L225 Difference]: With dead ends: 230 [2021-05-02 23:19:39,093 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 23:19:39,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 5628.2ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:19:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 23:19:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-05-02 23:19:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-05-02 23:19:39,098 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-05-02 23:19:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:39,098 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-05-02 23:19:39,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-05-02 23:19:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-02 23:19:39,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:39,099 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:39,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:19:39,100 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:39,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1039143084, now seen corresponding path program 105 times [2021-05-02 23:19:39,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:39,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848172336] [2021-05-02 23:19:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:39,106 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:39,107 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:44,932 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:44,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848172336] [2021-05-02 23:19:44,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [848172336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:44,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:44,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:19:44,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60344729] [2021-05-02 23:19:44,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:19:44,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:19:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:19:44,935 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:45,442 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-05-02 23:19:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:19:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2021-05-02 23:19:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:45,443 INFO L225 Difference]: With dead ends: 232 [2021-05-02 23:19:45,443 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 23:19:45,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 5707.4ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:19:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 23:19:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-05-02 23:19:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-05-02 23:19:45,447 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-05-02 23:19:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:45,448 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-05-02 23:19:45,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-05-02 23:19:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-02 23:19:45,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:45,459 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:45,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:19:45,460 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:45,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1310003662, now seen corresponding path program 106 times [2021-05-02 23:19:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:45,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218819991] [2021-05-02 23:19:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:45,465 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:45,465 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:51,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:51,278 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:51,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218819991] [2021-05-02 23:19:51,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218819991] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:51,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:51,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:19:51,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242215197] [2021-05-02 23:19:51,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:19:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:19:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:19:51,280 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:51,799 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-05-02 23:19:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:19:51,800 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2021-05-02 23:19:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:51,800 INFO L225 Difference]: With dead ends: 234 [2021-05-02 23:19:51,800 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 23:19:51,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5679.9ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:19:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 23:19:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-02 23:19:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-05-02 23:19:51,804 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-05-02 23:19:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:51,804 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-05-02 23:19:51,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-05-02 23:19:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 23:19:51,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:51,805 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:51,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:19:51,805 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash -385985936, now seen corresponding path program 107 times [2021-05-02 23:19:51,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:51,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833987038] [2021-05-02 23:19:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:51,809 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:51,810 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:57,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:57,855 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:57,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833987038] [2021-05-02 23:19:57,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833987038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:57,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:57,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:19:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047150600] [2021-05-02 23:19:57,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:19:57,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:19:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:19:57,857 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:58,420 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-05-02 23:19:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:19:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2021-05-02 23:19:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:58,422 INFO L225 Difference]: With dead ends: 236 [2021-05-02 23:19:58,422 INFO L226 Difference]: Without dead ends: 230 [2021-05-02 23:19:58,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5926.9ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:19:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-02 23:19:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-05-02 23:19:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-05-02 23:19:58,426 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-05-02 23:19:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:58,426 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-05-02 23:19:58,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-05-02 23:19:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 23:19:58,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:58,427 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:58,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:19:58,428 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1855582866, now seen corresponding path program 108 times [2021-05-02 23:19:58,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:58,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356609837] [2021-05-02 23:19:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:58,437 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:58,438 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:05,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:05,384 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:05,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356609837] [2021-05-02 23:20:05,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [356609837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:05,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:05,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:20:05,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140992204] [2021-05-02 23:20:05,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:20:05,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:20:05,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:20:05,387 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:06,047 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-05-02 23:20:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:20:06,048 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2021-05-02 23:20:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:06,049 INFO L225 Difference]: With dead ends: 238 [2021-05-02 23:20:06,049 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 23:20:06,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 6796.4ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:20:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 23:20:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-05-02 23:20:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-05-02 23:20:06,052 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-05-02 23:20:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:06,052 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-05-02 23:20:06,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-05-02 23:20:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-02 23:20:06,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:06,053 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:06,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:20:06,053 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash -70381004, now seen corresponding path program 109 times [2021-05-02 23:20:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:06,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393958610] [2021-05-02 23:20:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:06,062 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:06,063 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:13,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:13,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393958610] [2021-05-02 23:20:13,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [393958610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:13,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:13,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:20:13,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757636406] [2021-05-02 23:20:13,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:20:13,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:20:13,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:20:13,163 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:13,973 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-05-02 23:20:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:20:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2021-05-02 23:20:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:13,975 INFO L225 Difference]: With dead ends: 240 [2021-05-02 23:20:13,975 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 23:20:13,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6957.8ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:20:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 23:20:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-05-02 23:20:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-05-02 23:20:13,980 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-05-02 23:20:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:13,981 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-05-02 23:20:13,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-05-02 23:20:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-02 23:20:13,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:13,982 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:13,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:20:13,982 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 209244502, now seen corresponding path program 110 times [2021-05-02 23:20:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:13,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709348670] [2021-05-02 23:20:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:13,988 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:13,989 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:20,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:20,679 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709348670] [2021-05-02 23:20:20,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [709348670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:20,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:20,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:20:20,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890598004] [2021-05-02 23:20:20,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:20:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:20:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:20:20,681 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:21,559 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-05-02 23:20:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:20:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2021-05-02 23:20:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:21,561 INFO L225 Difference]: With dead ends: 242 [2021-05-02 23:20:21,561 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 23:20:21,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 6545.3ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:20:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 23:20:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 23:20:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-05-02 23:20:21,565 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-05-02 23:20:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:21,565 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-05-02 23:20:21,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-05-02 23:20:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 23:20:21,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:21,567 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:21,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:20:21,567 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1653583880, now seen corresponding path program 111 times [2021-05-02 23:20:21,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:21,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280063744] [2021-05-02 23:20:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:21,573 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:21,574 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:30,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:30,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280063744] [2021-05-02 23:20:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280063744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:30,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:30,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:20:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462177307] [2021-05-02 23:20:30,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:20:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:20:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:20:30,114 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:30,906 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-05-02 23:20:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:20:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2021-05-02 23:20:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:30,908 INFO L225 Difference]: With dead ends: 244 [2021-05-02 23:20:30,908 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 23:20:30,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 8369.2ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:20:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 23:20:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-05-02 23:20:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-05-02 23:20:30,911 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-05-02 23:20:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:30,912 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-05-02 23:20:30,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-05-02 23:20:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 23:20:30,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:30,912 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:30,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:20:30,913 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash -830296550, now seen corresponding path program 112 times [2021-05-02 23:20:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:30,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98436333] [2021-05-02 23:20:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:30,918 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:30,919 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:39,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:39,411 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98436333] [2021-05-02 23:20:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [98436333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:39,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:39,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:20:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366075089] [2021-05-02 23:20:39,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:20:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:20:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:20:39,413 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:40,406 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-05-02 23:20:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:20:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2021-05-02 23:20:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:40,408 INFO L225 Difference]: With dead ends: 246 [2021-05-02 23:20:40,408 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 23:20:40,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 8347.8ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:20:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 23:20:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-05-02 23:20:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-05-02 23:20:40,413 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-05-02 23:20:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:40,413 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-05-02 23:20:40,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-05-02 23:20:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 23:20:40,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:40,414 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:40,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:20:40,414 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash 74845116, now seen corresponding path program 113 times [2021-05-02 23:20:40,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:40,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057036581] [2021-05-02 23:20:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:40,419 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:40,420 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:47,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:47,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057036581] [2021-05-02 23:20:47,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057036581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:47,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:47,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:20:47,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157174732] [2021-05-02 23:20:47,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:20:47,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:20:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:20:47,831 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:48,242 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-05-02 23:20:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:20:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-02 23:20:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:48,244 INFO L225 Difference]: With dead ends: 248 [2021-05-02 23:20:48,244 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 23:20:48,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7268.2ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:20:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 23:20:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-05-02 23:20:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-05-02 23:20:48,248 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-05-02 23:20:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:48,248 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-05-02 23:20:48,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-05-02 23:20:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-02 23:20:48,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:48,249 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:48,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:20:48,249 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1962374946, now seen corresponding path program 114 times [2021-05-02 23:20:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:48,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110774482] [2021-05-02 23:20:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:48,261 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:48,262 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:56,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:56,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:56,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110774482] [2021-05-02 23:20:56,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110774482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:56,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:56,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:20:56,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055079942] [2021-05-02 23:20:56,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:20:56,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:20:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:20:56,311 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:57,119 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-05-02 23:20:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:20:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2021-05-02 23:20:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:57,121 INFO L225 Difference]: With dead ends: 250 [2021-05-02 23:20:57,121 INFO L226 Difference]: Without dead ends: 244 [2021-05-02 23:20:57,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 7903.8ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:20:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-02 23:20:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-05-02 23:20:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-05-02 23:20:57,125 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-05-02 23:20:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:57,125 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-05-02 23:20:57,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-05-02 23:20:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 23:20:57,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:57,126 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:57,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:20:57,126 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:57,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1225767552, now seen corresponding path program 115 times [2021-05-02 23:20:57,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:57,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936065424] [2021-05-02 23:20:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:57,131 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:57,133 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:06,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:06,680 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:06,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936065424] [2021-05-02 23:21:06,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [936065424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:06,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:06,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:21:06,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464037604] [2021-05-02 23:21:06,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:21:06,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:06,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:21:06,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:21:06,683 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:07,489 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-05-02 23:21:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:21:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2021-05-02 23:21:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:07,491 INFO L225 Difference]: With dead ends: 252 [2021-05-02 23:21:07,491 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 23:21:07,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 9373.7ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:21:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 23:21:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-05-02 23:21:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-05-02 23:21:07,494 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-05-02 23:21:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:07,495 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-05-02 23:21:07,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-05-02 23:21:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 23:21:07,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:07,496 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:07,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:21:07,496 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:07,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2015665758, now seen corresponding path program 116 times [2021-05-02 23:21:07,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:07,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010704984] [2021-05-02 23:21:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:07,513 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:07,514 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:17,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:17,636 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:17,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010704984] [2021-05-02 23:21:17,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2010704984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:17,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:17,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:21:17,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223380391] [2021-05-02 23:21:17,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:21:17,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:17,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:21:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:21:17,638 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:18,124 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-05-02 23:21:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:21:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2021-05-02 23:21:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:18,126 INFO L225 Difference]: With dead ends: 254 [2021-05-02 23:21:18,126 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 23:21:18,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 9928.4ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:21:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 23:21:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-05-02 23:21:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-05-02 23:21:18,131 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-05-02 23:21:18,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:18,131 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-05-02 23:21:18,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-05-02 23:21:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 23:21:18,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:18,132 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:18,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:21:18,132 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash -898630332, now seen corresponding path program 117 times [2021-05-02 23:21:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:18,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298909590] [2021-05-02 23:21:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:18,140 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:18,141 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:27,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:27,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:27,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298909590] [2021-05-02 23:21:27,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [298909590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:27,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:27,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-02 23:21:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921283931] [2021-05-02 23:21:27,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 23:21:27,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:27,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 23:21:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:21:27,862 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:29,111 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-05-02 23:21:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:21:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2021-05-02 23:21:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:29,113 INFO L225 Difference]: With dead ends: 256 [2021-05-02 23:21:29,114 INFO L226 Difference]: Without dead ends: 250 [2021-05-02 23:21:29,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 9556.5ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:21:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-02 23:21:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-02 23:21:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-05-02 23:21:29,119 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-05-02 23:21:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:29,120 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-05-02 23:21:29,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-05-02 23:21:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-02 23:21:29,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:29,121 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:29,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:21:29,121 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1169409946, now seen corresponding path program 118 times [2021-05-02 23:21:29,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:29,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697028994] [2021-05-02 23:21:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:29,129 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:29,130 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:41,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:41,144 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697028994] [2021-05-02 23:21:41,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697028994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:41,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:41,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-02 23:21:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595858565] [2021-05-02 23:21:41,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 23:21:41,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 23:21:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:21:41,147 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:42,240 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-05-02 23:21:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 23:21:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2021-05-02 23:21:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:42,243 INFO L225 Difference]: With dead ends: 258 [2021-05-02 23:21:42,243 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 23:21:42,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 11816.6ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:21:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 23:21:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-05-02 23:21:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-05-02 23:21:42,248 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-05-02 23:21:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:42,248 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-05-02 23:21:42,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-05-02 23:21:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 23:21:42,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:42,249 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:42,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:21:42,249 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash 604386056, now seen corresponding path program 119 times [2021-05-02 23:21:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:42,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151698069] [2021-05-02 23:21:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:42,266 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:42,267 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:54,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:54,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:54,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151698069] [2021-05-02 23:21:54,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151698069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:54,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:54,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-02 23:21:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528884179] [2021-05-02 23:21:54,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 23:21:54,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 23:21:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:21:54,343 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:55,285 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-05-02 23:21:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 23:21:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-02 23:21:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:55,286 INFO L225 Difference]: With dead ends: 260 [2021-05-02 23:21:55,286 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:21:55,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 11845.9ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:21:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:21:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-05-02 23:21:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-05-02 23:21:55,291 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-05-02 23:21:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:55,291 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-05-02 23:21:55,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-05-02 23:21:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 23:21:55,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:55,292 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:55,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:21:55,292 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash 120327466, now seen corresponding path program 120 times [2021-05-02 23:21:55,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:55,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191556679] [2021-05-02 23:21:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:55,297 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:55,298 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:03,654 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:03,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191556679] [2021-05-02 23:22:03,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191556679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:03,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:03,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:22:03,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637531143] [2021-05-02 23:22:03,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:22:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:22:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:22:03,657 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:04,691 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-05-02 23:22:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:22:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2021-05-02 23:22:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:04,693 INFO L225 Difference]: With dead ends: 262 [2021-05-02 23:22:04,693 INFO L226 Difference]: Without dead ends: 256 [2021-05-02 23:22:04,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 8189.0ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:22:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-02 23:22:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-05-02 23:22:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-05-02 23:22:04,698 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-05-02 23:22:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:04,698 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-05-02 23:22:04,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-05-02 23:22:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-02 23:22:04,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:04,699 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:04,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:22:04,700 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1203509556, now seen corresponding path program 121 times [2021-05-02 23:22:04,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:04,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357032376] [2021-05-02 23:22:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:04,721 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:04,723 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:16,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:16,041 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:16,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357032376] [2021-05-02 23:22:16,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [357032376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:16,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:16,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-02 23:22:16,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219290907] [2021-05-02 23:22:16,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 23:22:16,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:16,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 23:22:16,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:22:16,044 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:17,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:17,122 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-05-02 23:22:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 23:22:17,123 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2021-05-02 23:22:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:17,124 INFO L225 Difference]: With dead ends: 264 [2021-05-02 23:22:17,124 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 23:22:17,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 11090.9ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:22:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 23:22:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-05-02 23:22:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-05-02 23:22:17,130 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-05-02 23:22:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:17,130 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-05-02 23:22:17,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-05-02 23:22:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-02 23:22:17,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:17,132 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:17,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:22:17,132 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2100568082, now seen corresponding path program 122 times [2021-05-02 23:22:17,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:17,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409214826] [2021-05-02 23:22:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:17,139 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:17,140 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:28,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:28,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409214826] [2021-05-02 23:22:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [409214826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:28,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:28,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-02 23:22:28,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091271448] [2021-05-02 23:22:28,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 23:22:28,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 23:22:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:22:28,135 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:29,285 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-05-02 23:22:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 23:22:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2021-05-02 23:22:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:29,288 INFO L225 Difference]: With dead ends: 266 [2021-05-02 23:22:29,288 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 23:22:29,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 10799.9ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:22:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 23:22:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-05-02 23:22:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-05-02 23:22:29,293 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-05-02 23:22:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:29,293 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-05-02 23:22:29,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-05-02 23:22:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 23:22:29,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:29,294 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:29,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:22:29,294 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash -885385072, now seen corresponding path program 123 times [2021-05-02 23:22:29,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:29,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563152247] [2021-05-02 23:22:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:29,301 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:29,302 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:45,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563152247] [2021-05-02 23:22:45,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563152247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:45,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:45,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-02 23:22:45,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317030146] [2021-05-02 23:22:45,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 23:22:45,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 23:22:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:22:45,857 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:47,425 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-05-02 23:22:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 23:22:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2021-05-02 23:22:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:47,429 INFO L225 Difference]: With dead ends: 268 [2021-05-02 23:22:47,429 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 23:22:47,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 16297.4ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:22:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 23:22:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-05-02 23:22:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-05-02 23:22:47,434 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-05-02 23:22:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:47,434 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-05-02 23:22:47,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-05-02 23:22:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 23:22:47,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:47,436 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:47,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:22:47,436 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1325616974, now seen corresponding path program 124 times [2021-05-02 23:22:47,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:47,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890050389] [2021-05-02 23:22:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:47,447 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:47,449 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:03,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:03,317 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:03,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890050389] [2021-05-02 23:23:03,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [890050389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:03,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:03,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:23:03,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309035417] [2021-05-02 23:23:03,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:23:03,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:23:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:23:03,320 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:04,655 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-05-02 23:23:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:23:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2021-05-02 23:23:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:04,659 INFO L225 Difference]: With dead ends: 270 [2021-05-02 23:23:04,659 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 23:23:04,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 15582.2ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:23:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 23:23:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-05-02 23:23:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-05-02 23:23:04,665 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-05-02 23:23:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:04,665 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-05-02 23:23:04,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-05-02 23:23:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-02 23:23:04,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:04,666 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:04,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-02 23:23:04,667 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash 813287508, now seen corresponding path program 125 times [2021-05-02 23:23:04,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:04,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166961246] [2021-05-02 23:23:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:04,674 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:04,677 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:24,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:24,570 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:24,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166961246] [2021-05-02 23:23:24,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [166961246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:24,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:24,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-02 23:23:24,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264418008] [2021-05-02 23:23:24,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 23:23:24,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 23:23:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:23:24,573 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:25,967 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2021-05-02 23:23:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:23:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2021-05-02 23:23:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:25,972 INFO L225 Difference]: With dead ends: 272 [2021-05-02 23:23:25,972 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 23:23:25,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 19611.0ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:23:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 23:23:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-02 23:23:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2021-05-02 23:23:25,978 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2021-05-02 23:23:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:25,978 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2021-05-02 23:23:25,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2021-05-02 23:23:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-02 23:23:25,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:25,980 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:25,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:23:25,980 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash -988840074, now seen corresponding path program 126 times [2021-05-02 23:23:25,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:25,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481828851] [2021-05-02 23:23:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:25,989 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:25,990 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:49,153 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:49,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481828851] [2021-05-02 23:23:49,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [481828851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:49,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:49,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-02 23:23:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265536647] [2021-05-02 23:23:49,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 23:23:49,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 23:23:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:23:49,158 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:51,400 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2021-05-02 23:23:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 23:23:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-02 23:23:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:51,406 INFO L225 Difference]: With dead ends: 274 [2021-05-02 23:23:51,406 INFO L226 Difference]: Without dead ends: 268 [2021-05-02 23:23:51,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 22812.8ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:23:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-02 23:23:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-05-02 23:23:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-05-02 23:23:51,414 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2021-05-02 23:23:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:51,414 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-05-02 23:23:51,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-05-02 23:23:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 23:23:51,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:51,416 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:51,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:23:51,416 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1961626088, now seen corresponding path program 127 times [2021-05-02 23:23:51,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:51,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899281738] [2021-05-02 23:23:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:51,427 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:51,429 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:17,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:17,664 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:17,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899281738] [2021-05-02 23:24:17,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [899281738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:17,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:17,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-02 23:24:17,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685246790] [2021-05-02 23:24:17,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 23:24:17,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 23:24:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:24:17,668 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:19,826 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2021-05-02 23:24:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 23:24:19,829 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-02 23:24:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:19,830 INFO L225 Difference]: With dead ends: 276 [2021-05-02 23:24:19,830 INFO L226 Difference]: Without dead ends: 270 [2021-05-02 23:24:19,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 25813.6ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:24:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-02 23:24:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-05-02 23:24:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-05-02 23:24:19,838 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2021-05-02 23:24:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:19,838 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-05-02 23:24:19,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-05-02 23:24:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 23:24:19,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:19,839 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:19,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-02 23:24:19,840 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -506115014, now seen corresponding path program 128 times [2021-05-02 23:24:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:19,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565382944] [2021-05-02 23:24:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:19,849 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:19,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:40,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:40,560 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:40,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565382944] [2021-05-02 23:24:40,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [565382944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:40,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:40,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:24:40,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946710924] [2021-05-02 23:24:40,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:24:40,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:24:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:24:40,563 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:41,237 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2021-05-02 23:24:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:24:41,237 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2021-05-02 23:24:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:41,238 INFO L225 Difference]: With dead ends: 278 [2021-05-02 23:24:41,238 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 23:24:41,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 20377.2ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:24:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 23:24:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-05-02 23:24:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2021-05-02 23:24:41,243 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2021-05-02 23:24:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:41,243 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2021-05-02 23:24:41,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2021-05-02 23:24:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-02 23:24:41,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:41,244 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:41,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:24:41,245 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:41,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1919311396, now seen corresponding path program 129 times [2021-05-02 23:24:41,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:41,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982283424] [2021-05-02 23:24:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:41,256 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:41,257 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:02,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:02,705 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:02,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982283424] [2021-05-02 23:25:02,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1982283424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:02,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:02,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-02 23:25:02,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987822581] [2021-05-02 23:25:02,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-02 23:25:02,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-02 23:25:02,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:25:02,709 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:04,037 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2021-05-02 23:25:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-02 23:25:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2021-05-02 23:25:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:04,039 INFO L225 Difference]: With dead ends: 280 [2021-05-02 23:25:04,039 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 23:25:04,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 21157.9ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:25:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 23:25:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-05-02 23:25:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2021-05-02 23:25:04,045 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2021-05-02 23:25:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:04,045 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2021-05-02 23:25:04,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2021-05-02 23:25:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-02 23:25:04,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:04,046 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:04,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:25:04,047 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1503598334, now seen corresponding path program 130 times [2021-05-02 23:25:04,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:04,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411925981] [2021-05-02 23:25:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:04,053 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:04,054 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:30,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:30,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411925981] [2021-05-02 23:25:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [411925981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-02 23:25:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059853004] [2021-05-02 23:25:30,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 23:25:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 23:25:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:25:30,712 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:32,081 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2021-05-02 23:25:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 23:25:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2021-05-02 23:25:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:32,087 INFO L225 Difference]: With dead ends: 282 [2021-05-02 23:25:32,087 INFO L226 Difference]: Without dead ends: 276 [2021-05-02 23:25:32,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 26298.4ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:25:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-02 23:25:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-05-02 23:25:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0037037037037038) internal successors, (271), 270 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-05-02 23:25:32,093 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2021-05-02 23:25:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:32,093 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-05-02 23:25:32,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-05-02 23:25:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 23:25:32,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:32,095 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:32,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-02 23:25:32,095 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:32,096 INFO L82 PathProgramCache]: Analyzing trace with hash 974900128, now seen corresponding path program 131 times [2021-05-02 23:25:32,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:32,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754544368] [2021-05-02 23:25:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:32,104 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:32,106 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:54,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:54,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:54,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754544368] [2021-05-02 23:25:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [754544368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:54,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:54,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-02 23:25:54,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045106856] [2021-05-02 23:25:54,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 23:25:54,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 23:25:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:25:54,656 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:56,416 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2021-05-02 23:25:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 23:25:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2021-05-02 23:25:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:56,420 INFO L225 Difference]: With dead ends: 284 [2021-05-02 23:25:56,420 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 23:25:56,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 22128.9ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:25:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 23:25:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2021-05-02 23:25:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0036764705882353) internal successors, (273), 272 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2021-05-02 23:25:56,427 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2021-05-02 23:25:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:56,427 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2021-05-02 23:25:56,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2021-05-02 23:25:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-02 23:25:56,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:56,429 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:56,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:25:56,429 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash -297934910, now seen corresponding path program 132 times [2021-05-02 23:25:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162733858] [2021-05-02 23:25:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:56,458 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:56,460 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:36,181 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:36,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162733858] [2021-05-02 23:26:36,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [162733858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:36,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:36,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-02 23:26:36,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215621801] [2021-05-02 23:26:36,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 23:26:36,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 23:26:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:26:36,185 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:40,073 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2021-05-02 23:26:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 23:26:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2021-05-02 23:26:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:40,081 INFO L225 Difference]: With dead ends: 286 [2021-05-02 23:26:40,081 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 23:26:40,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 39096.9ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:26:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 23:26:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-05-02 23:26:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0036496350364963) internal successors, (275), 274 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:40,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2021-05-02 23:26:40,089 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2021-05-02 23:26:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:40,089 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2021-05-02 23:26:40,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2021-05-02 23:26:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-02 23:26:40,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:40,091 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:40,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:26:40,091 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash 573272932, now seen corresponding path program 133 times [2021-05-02 23:26:40,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:40,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31100354] [2021-05-02 23:26:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:40,107 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:40,109 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:22,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:22,277 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:22,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31100354] [2021-05-02 23:27:22,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [31100354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:22,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:22,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-02 23:27:22,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380142768] [2021-05-02 23:27:22,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 23:27:22,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 23:27:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:27:22,280 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:25,031 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2021-05-02 23:27:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-02 23:27:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2021-05-02 23:27:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:25,035 INFO L225 Difference]: With dead ends: 288 [2021-05-02 23:27:25,035 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 23:27:25,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 41546.5ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:27:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 23:27:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-05-02 23:27:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0036231884057971) internal successors, (277), 276 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2021-05-02 23:27:25,041 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2021-05-02 23:27:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:25,042 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2021-05-02 23:27:25,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2021-05-02 23:27:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-02 23:27:25,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:25,043 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:25,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:27:25,043 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash 285386374, now seen corresponding path program 134 times [2021-05-02 23:27:25,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:25,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619324107] [2021-05-02 23:27:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:25,055 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:25,056 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:53,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:53,147 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:53,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619324107] [2021-05-02 23:27:53,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619324107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:53,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:53,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-02 23:27:53,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913521154] [2021-05-02 23:27:53,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 23:27:53,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 23:27:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:27:53,151 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:54,703 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2021-05-02 23:27:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 23:27:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2021-05-02 23:27:54,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:54,709 INFO L225 Difference]: With dead ends: 290 [2021-05-02 23:27:54,709 INFO L226 Difference]: Without dead ends: 284 [2021-05-02 23:27:54,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 27627.5ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:27:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-02 23:27:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2021-05-02 23:27:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2021-05-02 23:27:54,715 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2021-05-02 23:27:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:54,715 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2021-05-02 23:27:54,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2021-05-02 23:27:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-02 23:27:54,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:54,716 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:54,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-02 23:27:54,716 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1495688920, now seen corresponding path program 135 times [2021-05-02 23:27:54,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:54,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620833780] [2021-05-02 23:27:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:54,724 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:54,725 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:24,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:24,384 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:24,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620833780] [2021-05-02 23:28:24,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620833780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:24,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:24,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-02 23:28:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194509419] [2021-05-02 23:28:24,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-02 23:28:24,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-02 23:28:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:28:24,387 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:26,782 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2021-05-02 23:28:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-02 23:28:26,787 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2021-05-02 23:28:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:26,788 INFO L225 Difference]: With dead ends: 292 [2021-05-02 23:28:26,788 INFO L226 Difference]: Without dead ends: 286 [2021-05-02 23:28:26,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 29194.2ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:28:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-02 23:28:26,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-02 23:28:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0035714285714286) internal successors, (281), 280 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2021-05-02 23:28:26,796 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2021-05-02 23:28:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:26,796 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2021-05-02 23:28:26,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2021-05-02 23:28:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-02 23:28:26,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:26,798 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:26,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-02 23:28:26,798 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash 582904650, now seen corresponding path program 136 times [2021-05-02 23:28:26,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:26,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066202984] [2021-05-02 23:28:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:26,809 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:26,810 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat