/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:10:03,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:10:03,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:10:03,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:10:03,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:10:03,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:10:03,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:10:03,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:10:03,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:10:03,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:10:03,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:10:03,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:10:03,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:10:03,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:10:03,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:10:03,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:10:03,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:10:03,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:10:03,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:10:03,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:10:03,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:10:03,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:10:03,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:10:03,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:10:03,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:10:03,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:10:03,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:10:03,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:10:03,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:10:03,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:10:03,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:10:03,895 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:10:03,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:10:04,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:10:04,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:10:04,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:10:04,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:10:04,193 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:10:04,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2021-05-06 12:10:04,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a536cbb/6b69ff201b554c6bac104c929f13a475/FLAGa3dae8704 [2021-05-06 12:10:04,644 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:10:04,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2021-05-06 12:10:04,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a536cbb/6b69ff201b554c6bac104c929f13a475/FLAGa3dae8704 [2021-05-06 12:10:04,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a536cbb/6b69ff201b554c6bac104c929f13a475 [2021-05-06 12:10:04,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:10:04,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:10:04,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:10:04,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:10:04,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:10:04,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737ca86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04, skipping insertion in model container [2021-05-06 12:10:04,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:10:04,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:10:04,806 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2021-05-06 12:10:04,812 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2021-05-06 12:10:04,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:10:04,819 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:10:04,830 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2021-05-06 12:10:04,831 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2021-05-06 12:10:04,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:10:04,841 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:10:04,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04 WrapperNode [2021-05-06 12:10:04,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:10:04,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:10:04,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:10:04,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:10:04,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (1/1) ... [2021-05-06 12:10:04,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:10:04,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:10:04,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:10:04,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:10:04,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (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 [2021-05-06 12:10:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:10:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:10:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:10:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:10:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:10:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:10:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:10:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:10:04,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:10:05,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:10:05,229 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:10:05,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:10:05 BoogieIcfgContainer [2021-05-06 12:10:05,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:10:05,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:10:05,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:10:05,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:10:05,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:10:04" (1/3) ... [2021-05-06 12:10:05,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec4d0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:10:05, skipping insertion in model container [2021-05-06 12:10:05,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:04" (2/3) ... [2021-05-06 12:10:05,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec4d0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:10:05, skipping insertion in model container [2021-05-06 12:10:05,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:10:05" (3/3) ... [2021-05-06 12:10:05,235 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2021-05-06 12:10:05,239 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:10:05,242 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-05-06 12:10:05,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-06 12:10:05,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:10:05,270 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:10:05,270 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:10:05,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:10:05,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:10:05,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:10:05,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:10:05,270 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:10:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 12:10:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-06 12:10:05,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:05,284 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:05,284 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2021-05-06 12:10:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:05,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503948777] [2021-05-06 12:10:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:05,331 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:05,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:05,495 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:05,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503948777] [2021-05-06 12:10:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503948777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:05,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:05,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 12:10:05,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034101344] [2021-05-06 12:10:05,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 12:10:05,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 12:10:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 12:10:05,510 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:05,600 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-05-06 12:10:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 12:10:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-06 12:10:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:05,607 INFO L225 Difference]: With dead ends: 29 [2021-05-06 12:10:05,608 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 12:10:05,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 12:10:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 12:10:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 12:10:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 12:10:05,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2021-05-06 12:10:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:05,646 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 12:10:05,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 12:10:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 12:10:05,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:05,648 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:05,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:10:05,648 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2021-05-06 12:10:05,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:05,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759129506] [2021-05-06 12:10:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:05,677 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:05,677 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:05,685 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:05,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:05,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:05,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759129506] [2021-05-06 12:10:05,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759129506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:05,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:05,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 12:10:05,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416200754] [2021-05-06 12:10:05,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 12:10:05,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 12:10:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 12:10:05,830 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:05,957 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 12:10:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 12:10:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 12:10:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:05,958 INFO L225 Difference]: With dead ends: 22 [2021-05-06 12:10:05,958 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 12:10:05,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:10:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 12:10:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-05-06 12:10:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-06 12:10:05,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2021-05-06 12:10:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:05,964 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-06 12:10:05,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-06 12:10:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 12:10:05,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:05,964 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:05,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:10:05,964 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1837062518, now seen corresponding path program 1 times [2021-05-06 12:10:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:05,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760451708] [2021-05-06 12:10:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:05,968 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:05,968 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:05,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:06,063 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:06,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760451708] [2021-05-06 12:10:06,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [760451708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:06,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:06,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 12:10:06,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016180441] [2021-05-06 12:10:06,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 12:10:06,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:06,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 12:10:06,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 12:10:06,065 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:06,162 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-06 12:10:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 12:10:06,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 12:10:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:06,164 INFO L225 Difference]: With dead ends: 20 [2021-05-06 12:10:06,164 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 12:10:06,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:10:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 12:10:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-06 12:10:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-06 12:10:06,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2021-05-06 12:10:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:06,180 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-06 12:10:06,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-06 12:10:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 12:10:06,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:06,181 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:06,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 12:10:06,182 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1837111337, now seen corresponding path program 2 times [2021-05-06 12:10:06,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:06,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502059542] [2021-05-06 12:10:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:06,194 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:06,194 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:06,197 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:06,339 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:06,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502059542] [2021-05-06 12:10:06,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [502059542] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:06,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:06,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:10:06,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311355484] [2021-05-06 12:10:06,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:10:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:10:06,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:10:06,340 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:06,534 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-06 12:10:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 12:10:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 12:10:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:06,536 INFO L225 Difference]: With dead ends: 23 [2021-05-06 12:10:06,536 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 12:10:06,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 12:10:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 12:10:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-06 12:10:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-06 12:10:06,547 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2021-05-06 12:10:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:06,548 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-06 12:10:06,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-06 12:10:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 12:10:06,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:06,549 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:06,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 12:10:06,550 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 2 times [2021-05-06 12:10:06,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:06,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472569946] [2021-05-06 12:10:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:06,556 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:06,556 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:06,558 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:06,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472569946] [2021-05-06 12:10:06,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472569946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:06,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:06,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:10:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037197104] [2021-05-06 12:10:06,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:10:06,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:10:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:10:06,659 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:06,786 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-06 12:10:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 12:10:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 12:10:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:06,787 INFO L225 Difference]: With dead ends: 21 [2021-05-06 12:10:06,788 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 12:10:06,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 12:10:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 12:10:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 12:10:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 12:10:06,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2021-05-06 12:10:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:06,803 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 12:10:06,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 12:10:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 12:10:06,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:06,811 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:06,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 12:10:06,812 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:06,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1115928489, now seen corresponding path program 3 times [2021-05-06 12:10:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:06,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68151588] [2021-05-06 12:10:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:06,816 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:06,816 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:06,817 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:06,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:06,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68151588] [2021-05-06 12:10:06,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [68151588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:06,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:06,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 12:10:06,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815737891] [2021-05-06 12:10:06,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 12:10:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 12:10:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:10:06,951 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:07,283 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 12:10:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 12:10:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 12:10:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:07,285 INFO L225 Difference]: With dead ends: 24 [2021-05-06 12:10:07,285 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 12:10:07,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 12:10:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 12:10:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-05-06 12:10:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-06 12:10:07,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2021-05-06 12:10:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:07,289 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-06 12:10:07,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-06 12:10:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 12:10:07,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:07,289 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:07,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 12:10:07,290 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 234047862, now seen corresponding path program 3 times [2021-05-06 12:10:07,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:07,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332985818] [2021-05-06 12:10:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:07,294 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:07,294 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:07,295 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:07,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:07,399 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:07,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332985818] [2021-05-06 12:10:07,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [332985818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:07,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:07,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 12:10:07,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613338571] [2021-05-06 12:10:07,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 12:10:07,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:07,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 12:10:07,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:10:07,401 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:07,497 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 12:10:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 12:10:07,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 12:10:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:07,499 INFO L225 Difference]: With dead ends: 22 [2021-05-06 12:10:07,499 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 12:10:07,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-06 12:10:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 12:10:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 12:10:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-06 12:10:07,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2021-05-06 12:10:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:07,504 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-06 12:10:07,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-06 12:10:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 12:10:07,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:07,505 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:07,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 12:10:07,505 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash 234096681, now seen corresponding path program 4 times [2021-05-06 12:10:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:07,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281158971] [2021-05-06 12:10:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:07,508 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:07,508 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:07,508 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:07,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:07,592 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:07,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281158971] [2021-05-06 12:10:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [281158971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:07,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:07,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 12:10:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353940637] [2021-05-06 12:10:07,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 12:10:07,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 12:10:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 12:10:07,595 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:07,819 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-06 12:10:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 12:10:07,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 12:10:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:07,820 INFO L225 Difference]: With dead ends: 25 [2021-05-06 12:10:07,820 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 12:10:07,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 12:10:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 12:10:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-06 12:10:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-06 12:10:07,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-05-06 12:10:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:07,824 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-06 12:10:07,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-06 12:10:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 12:10:07,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:07,824 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:07,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 12:10:07,825 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1332934410, now seen corresponding path program 4 times [2021-05-06 12:10:07,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:07,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259007843] [2021-05-06 12:10:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:07,829 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:07,829 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:07,830 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:07,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:07,922 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:07,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259007843] [2021-05-06 12:10:07,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259007843] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:07,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:07,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 12:10:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361666306] [2021-05-06 12:10:07,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 12:10:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 12:10:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 12:10:07,923 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:08,209 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 12:10:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:08,275 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-06 12:10:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 12:10:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 12:10:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:08,278 INFO L225 Difference]: With dead ends: 23 [2021-05-06 12:10:08,278 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 12:10:08,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-06 12:10:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 12:10:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 12:10:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 12:10:08,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2021-05-06 12:10:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:08,284 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 12:10:08,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 12:10:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 12:10:08,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:08,285 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:08,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 12:10:08,285 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1332885591, now seen corresponding path program 5 times [2021-05-06 12:10:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:08,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181293446] [2021-05-06 12:10:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:08,288 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:08,288 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:08,289 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:08,468 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:08,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181293446] [2021-05-06 12:10:08,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [181293446] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:08,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:08,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 12:10:08,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735183547] [2021-05-06 12:10:08,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 12:10:08,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 12:10:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-06 12:10:08,469 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:08,817 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 12:10:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 12:10:08,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 12:10:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:08,818 INFO L225 Difference]: With dead ends: 26 [2021-05-06 12:10:08,818 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 12:10:08,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 12:10:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 12:10:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-05-06 12:10:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-05-06 12:10:08,821 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2021-05-06 12:10:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:08,821 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-05-06 12:10:08,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-05-06 12:10:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 12:10:08,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:08,822 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:08,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 12:10:08,822 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:08,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1630222710, now seen corresponding path program 5 times [2021-05-06 12:10:08,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:08,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298718939] [2021-05-06 12:10:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:08,825 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:08,825 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:08,825 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:08,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:08,909 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:08,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298718939] [2021-05-06 12:10:08,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1298718939] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:08,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:08,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 12:10:08,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898951744] [2021-05-06 12:10:08,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 12:10:08,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:08,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 12:10:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 12:10:08,910 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:09,082 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 12:10:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 12:10:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 12:10:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:09,083 INFO L225 Difference]: With dead ends: 24 [2021-05-06 12:10:09,083 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 12:10:09,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-05-06 12:10:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 12:10:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 12:10:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-06 12:10:09,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2021-05-06 12:10:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:09,086 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-06 12:10:09,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-06 12:10:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 12:10:09,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:09,087 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:09,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 12:10:09,087 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:09,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1630271529, now seen corresponding path program 6 times [2021-05-06 12:10:09,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:09,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262162223] [2021-05-06 12:10:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:09,090 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:09,090 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:09,090 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:09,175 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:09,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262162223] [2021-05-06 12:10:09,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [262162223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:09,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:09,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 12:10:09,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396370849] [2021-05-06 12:10:09,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 12:10:09,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:09,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 12:10:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-06 12:10:09,176 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:09,532 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-06 12:10:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 12:10:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 12:10:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:09,533 INFO L225 Difference]: With dead ends: 27 [2021-05-06 12:10:09,533 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 12:10:09,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 12:10:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 12:10:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-06 12:10:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 12:10:09,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2021-05-06 12:10:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:09,537 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 12:10:09,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 12:10:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 12:10:09,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:09,537 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:09,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 12:10:09,537 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 6 times [2021-05-06 12:10:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:09,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85037536] [2021-05-06 12:10:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:09,540 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:09,540 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:09,541 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:09,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:09,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85037536] [2021-05-06 12:10:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [85037536] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:09,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:09,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 12:10:09,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390863279] [2021-05-06 12:10:09,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 12:10:09,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 12:10:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 12:10:09,628 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:09,819 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-06 12:10:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 12:10:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 12:10:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:09,820 INFO L225 Difference]: With dead ends: 25 [2021-05-06 12:10:09,820 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 12:10:09,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-06 12:10:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 12:10:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-06 12:10:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 12:10:09,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2021-05-06 12:10:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:09,823 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 12:10:09,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 12:10:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 12:10:09,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:09,824 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:09,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 12:10:09,824 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1001138263, now seen corresponding path program 7 times [2021-05-06 12:10:09,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:09,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904871724] [2021-05-06 12:10:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:09,830 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:09,830 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:09,831 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:09,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:09,927 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904871724] [2021-05-06 12:10:09,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904871724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:09,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:09,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 12:10:09,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743101782] [2021-05-06 12:10:09,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 12:10:09,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 12:10:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 12:10:09,928 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:10,355 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 12:10:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 12:10:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 12:10:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:10,356 INFO L225 Difference]: With dead ends: 28 [2021-05-06 12:10:10,356 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 12:10:10,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 422.7ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-05-06 12:10:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 12:10:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-05-06 12:10:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-06 12:10:10,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2021-05-06 12:10:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:10,360 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-06 12:10:10,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-06 12:10:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 12:10:10,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:10,360 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:10,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 12:10:10,360 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash -970512010, now seen corresponding path program 7 times [2021-05-06 12:10:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:10,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239004584] [2021-05-06 12:10:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:10,363 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:10,363 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:10,364 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:10,452 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239004584] [2021-05-06 12:10:10,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [239004584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:10,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:10,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 12:10:10,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269843097] [2021-05-06 12:10:10,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 12:10:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 12:10:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 12:10:10,453 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:10,654 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 12:10:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 12:10:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 12:10:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:10,654 INFO L225 Difference]: With dead ends: 26 [2021-05-06 12:10:10,655 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 12:10:10,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-05-06 12:10:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 12:10:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 12:10:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-06 12:10:10,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2021-05-06 12:10:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:10,658 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-06 12:10:10,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-06 12:10:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 12:10:10,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:10,659 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:10,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 12:10:10,659 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash -970463191, now seen corresponding path program 8 times [2021-05-06 12:10:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:10,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140616371] [2021-05-06 12:10:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:10,662 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:10,662 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:10,662 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:10,771 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140616371] [2021-05-06 12:10:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140616371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:10,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:10,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 12:10:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146729492] [2021-05-06 12:10:10,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 12:10:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 12:10:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-06 12:10:10,773 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:11,189 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-06 12:10:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 12:10:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 12:10:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:11,190 INFO L225 Difference]: With dead ends: 29 [2021-05-06 12:10:11,190 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 12:10:11,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-05-06 12:10:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 12:10:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-05-06 12:10:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-06 12:10:11,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-05-06 12:10:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:11,197 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-06 12:10:11,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-06 12:10:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 12:10:11,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:11,198 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:11,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-06 12:10:11,198 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash -19584778, now seen corresponding path program 8 times [2021-05-06 12:10:11,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:11,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063744891] [2021-05-06 12:10:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:11,201 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:11,201 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:11,202 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:11,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:11,308 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:11,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063744891] [2021-05-06 12:10:11,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063744891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:11,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:11,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 12:10:11,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356893955] [2021-05-06 12:10:11,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 12:10:11,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:11,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 12:10:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 12:10:11,309 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:11,631 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-06 12:10:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 12:10:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 12:10:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:11,631 INFO L225 Difference]: With dead ends: 27 [2021-05-06 12:10:11,631 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 12:10:11,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-05-06 12:10:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 12:10:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 12:10:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 12:10:11,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2021-05-06 12:10:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:11,635 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 12:10:11,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 12:10:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 12:10:11,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:11,635 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:11,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-06 12:10:11,635 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash -19535959, now seen corresponding path program 9 times [2021-05-06 12:10:11,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:11,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842468501] [2021-05-06 12:10:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:11,638 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:11,638 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:11,639 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:11,751 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842468501] [2021-05-06 12:10:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [842468501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:11,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:11,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 12:10:11,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288000998] [2021-05-06 12:10:11,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 12:10:11,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 12:10:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 12:10:11,752 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:12,264 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 12:10:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 12:10:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 12:10:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:12,265 INFO L225 Difference]: With dead ends: 30 [2021-05-06 12:10:12,265 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 12:10:12,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 505.0ms TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2021-05-06 12:10:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 12:10:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-05-06 12:10:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-05-06 12:10:12,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2021-05-06 12:10:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:12,268 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-05-06 12:10:12,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-05-06 12:10:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 12:10:12,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:12,269 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:12,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 12:10:12,269 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash -605611658, now seen corresponding path program 9 times [2021-05-06 12:10:12,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:12,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954704844] [2021-05-06 12:10:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:12,271 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:12,272 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:12,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:12,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:12,381 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954704844] [2021-05-06 12:10:12,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954704844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:12,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:12,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 12:10:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345919066] [2021-05-06 12:10:12,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 12:10:12,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 12:10:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 12:10:12,382 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:12,677 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 12:10:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 12:10:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 12:10:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:12,677 INFO L225 Difference]: With dead ends: 28 [2021-05-06 12:10:12,678 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 12:10:12,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-06 12:10:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 12:10:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 12:10:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-06 12:10:12,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2021-05-06 12:10:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:12,681 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-06 12:10:12,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-06 12:10:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 12:10:12,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:12,681 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:12,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-06 12:10:12,682 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash -605562839, now seen corresponding path program 10 times [2021-05-06 12:10:12,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:12,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279394694] [2021-05-06 12:10:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:12,685 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:12,685 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:12,686 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:12,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:12,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:12,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279394694] [2021-05-06 12:10:12,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279394694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:12,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:12,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 12:10:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044201992] [2021-05-06 12:10:12,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 12:10:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 12:10:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 12:10:12,822 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:13,426 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-06 12:10:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 12:10:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 12:10:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:13,428 INFO L225 Difference]: With dead ends: 31 [2021-05-06 12:10:13,428 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 12:10:13,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-05-06 12:10:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 12:10:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-05-06 12:10:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-06 12:10:13,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2021-05-06 12:10:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:13,431 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-06 12:10:13,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-06 12:10:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 12:10:13,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:13,432 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:13,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-06 12:10:13,432 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1592575754, now seen corresponding path program 10 times [2021-05-06 12:10:13,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:13,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286040442] [2021-05-06 12:10:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:13,441 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:13,442 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:13,443 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:13,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:13,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286040442] [2021-05-06 12:10:13,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286040442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:13,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:13,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 12:10:13,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332337797] [2021-05-06 12:10:13,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 12:10:13,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 12:10:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 12:10:13,623 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:13,921 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-06 12:10:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 12:10:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 12:10:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:13,922 INFO L225 Difference]: With dead ends: 29 [2021-05-06 12:10:13,922 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 12:10:13,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-05-06 12:10:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 12:10:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 12:10:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 12:10:13,925 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2021-05-06 12:10:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:13,925 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 12:10:13,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 12:10:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 12:10:13,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:13,925 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:13,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 12:10:13,925 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:13,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1592526935, now seen corresponding path program 11 times [2021-05-06 12:10:13,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:13,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713010657] [2021-05-06 12:10:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:13,929 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:13,929 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:13,930 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:14,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:14,077 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:14,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713010657] [2021-05-06 12:10:14,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [713010657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:14,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:14,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 12:10:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079716968] [2021-05-06 12:10:14,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 12:10:14,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:14,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 12:10:14,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-06 12:10:14,078 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:14,726 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 12:10:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 12:10:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 12:10:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:14,728 INFO L225 Difference]: With dead ends: 32 [2021-05-06 12:10:14,729 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 12:10:14,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 652.0ms TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2021-05-06 12:10:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 12:10:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-05-06 12:10:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-06 12:10:14,732 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-05-06 12:10:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:14,732 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-06 12:10:14,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-06 12:10:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 12:10:14,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:14,733 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:14,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-06 12:10:14,733 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2123691658, now seen corresponding path program 11 times [2021-05-06 12:10:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:14,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448353904] [2021-05-06 12:10:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:14,736 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:14,736 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:14,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:14,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:14,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:14,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448353904] [2021-05-06 12:10:14,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [448353904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:14,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:14,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 12:10:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124198790] [2021-05-06 12:10:14,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 12:10:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 12:10:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 12:10:14,898 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:15,275 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 12:10:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 12:10:15,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 12:10:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:15,275 INFO L225 Difference]: With dead ends: 30 [2021-05-06 12:10:15,275 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 12:10:15,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-05-06 12:10:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 12:10:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 12:10:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-06 12:10:15,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2021-05-06 12:10:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:15,280 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-06 12:10:15,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-06 12:10:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 12:10:15,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:15,280 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:15,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 12:10:15,281 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2123642839, now seen corresponding path program 12 times [2021-05-06 12:10:15,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:15,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557244365] [2021-05-06 12:10:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:15,283 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:15,283 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:15,284 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:15,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:15,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557244365] [2021-05-06 12:10:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557244365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:15,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:15,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 12:10:15,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746120553] [2021-05-06 12:10:15,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 12:10:15,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 12:10:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-06 12:10:15,480 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:16,160 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-06 12:10:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 12:10:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 12:10:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:16,160 INFO L225 Difference]: With dead ends: 33 [2021-05-06 12:10:16,160 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 12:10:16,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2021-05-06 12:10:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 12:10:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-05-06 12:10:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-06 12:10:16,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2021-05-06 12:10:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:16,164 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-06 12:10:16,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-06 12:10:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:10:16,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:16,165 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:16,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-06 12:10:16,165 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1408415498, now seen corresponding path program 12 times [2021-05-06 12:10:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809346551] [2021-05-06 12:10:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:16,170 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:16,170 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:16,172 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:16,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:16,373 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:16,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809346551] [2021-05-06 12:10:16,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [809346551] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:16,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:16,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 12:10:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449469638] [2021-05-06 12:10:16,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 12:10:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 12:10:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 12:10:16,374 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:16,788 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-06 12:10:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 12:10:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 12:10:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:16,789 INFO L225 Difference]: With dead ends: 31 [2021-05-06 12:10:16,789 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 12:10:16,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2021-05-06 12:10:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 12:10:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 12:10:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 12:10:16,792 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2021-05-06 12:10:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:16,792 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 12:10:16,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 12:10:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:10:16,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:16,792 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:16,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-06 12:10:16,792 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1408366679, now seen corresponding path program 13 times [2021-05-06 12:10:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:16,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383983810] [2021-05-06 12:10:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:16,795 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:16,795 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:16,796 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:16,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:16,966 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383983810] [2021-05-06 12:10:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [383983810] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:16,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:16,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 12:10:16,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118843495] [2021-05-06 12:10:16,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 12:10:16,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 12:10:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-05-06 12:10:16,973 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:17,807 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 12:10:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 12:10:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 12:10:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:17,809 INFO L225 Difference]: With dead ends: 34 [2021-05-06 12:10:17,809 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 12:10:17,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 834.9ms TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2021-05-06 12:10:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 12:10:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-05-06 12:10:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 12:10:17,812 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2021-05-06 12:10:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:17,812 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 12:10:17,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 12:10:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 12:10:17,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:17,813 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:17,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-06 12:10:17,813 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -709691018, now seen corresponding path program 13 times [2021-05-06 12:10:17,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:17,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277980124] [2021-05-06 12:10:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:17,816 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:17,816 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:17,816 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:17,974 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277980124] [2021-05-06 12:10:17,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [277980124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:17,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:17,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 12:10:17,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51412028] [2021-05-06 12:10:17,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 12:10:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 12:10:17,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 12:10:17,975 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:18,384 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 12:10:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 12:10:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 12:10:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:18,385 INFO L225 Difference]: With dead ends: 32 [2021-05-06 12:10:18,385 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 12:10:18,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2021-05-06 12:10:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 12:10:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 12:10:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-06 12:10:18,388 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2021-05-06 12:10:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:18,388 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-06 12:10:18,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-06 12:10:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 12:10:18,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:18,389 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:18,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-06 12:10:18,389 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash -709642199, now seen corresponding path program 14 times [2021-05-06 12:10:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:18,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645519367] [2021-05-06 12:10:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:18,395 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:18,395 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:18,395 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:18,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:18,560 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:18,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645519367] [2021-05-06 12:10:18,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645519367] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:18,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:18,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 12:10:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409558309] [2021-05-06 12:10:18,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 12:10:18,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 12:10:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-05-06 12:10:18,561 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:19,348 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-06 12:10:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 12:10:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 12:10:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:19,349 INFO L225 Difference]: With dead ends: 35 [2021-05-06 12:10:19,349 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 12:10:19,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 12:10:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 12:10:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-05-06 12:10:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-06 12:10:19,353 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2021-05-06 12:10:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:19,353 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-06 12:10:19,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-06 12:10:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 12:10:19,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:19,353 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:19,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-06 12:10:19,354 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 14 times [2021-05-06 12:10:19,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:19,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325229243] [2021-05-06 12:10:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:19,356 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:19,356 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:19,357 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:19,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:19,605 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:19,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325229243] [2021-05-06 12:10:19,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [325229243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:19,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:19,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 12:10:19,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297803781] [2021-05-06 12:10:19,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 12:10:19,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:19,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 12:10:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 12:10:19,606 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:20,083 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-06 12:10:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 12:10:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 12:10:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:20,084 INFO L225 Difference]: With dead ends: 33 [2021-05-06 12:10:20,084 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 12:10:20,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 12:10:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 12:10:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 12:10:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 12:10:20,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2021-05-06 12:10:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:20,087 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 12:10:20,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 12:10:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 12:10:20,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:20,088 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:20,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-06 12:10:20,088 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash -524019799, now seen corresponding path program 15 times [2021-05-06 12:10:20,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:20,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148227764] [2021-05-06 12:10:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:20,095 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:20,095 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:20,096 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:20,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:20,267 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:20,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148227764] [2021-05-06 12:10:20,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [148227764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:20,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:20,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 12:10:20,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778644046] [2021-05-06 12:10:20,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 12:10:20,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:20,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 12:10:20,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-05-06 12:10:20,268 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:21,062 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 12:10:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 12:10:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 12:10:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:21,063 INFO L225 Difference]: With dead ends: 36 [2021-05-06 12:10:21,063 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 12:10:21,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 12:10:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 12:10:21,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-05-06 12:10:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-06 12:10:21,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2021-05-06 12:10:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:21,067 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-06 12:10:21,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-06 12:10:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 12:10:21,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:21,068 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:21,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-06 12:10:21,068 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash 935258486, now seen corresponding path program 15 times [2021-05-06 12:10:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:21,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784681318] [2021-05-06 12:10:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:21,075 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:21,075 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:21,077 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:21,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:21,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:21,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784681318] [2021-05-06 12:10:21,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [784681318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:21,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:21,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 12:10:21,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459580570] [2021-05-06 12:10:21,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 12:10:21,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 12:10:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 12:10:21,326 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:21,800 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 12:10:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 12:10:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 12:10:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:21,801 INFO L225 Difference]: With dead ends: 34 [2021-05-06 12:10:21,801 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 12:10:21,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 590.1ms TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 12:10:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 12:10:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 12:10:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-06 12:10:21,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2021-05-06 12:10:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:21,805 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-06 12:10:21,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-06 12:10:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 12:10:21,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:21,805 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:21,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-06 12:10:21,805 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash 935307305, now seen corresponding path program 16 times [2021-05-06 12:10:21,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:21,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36735580] [2021-05-06 12:10:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:21,808 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:21,808 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:21,808 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:22,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:22,029 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36735580] [2021-05-06 12:10:22,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [36735580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:22,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:22,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 12:10:22,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72956781] [2021-05-06 12:10:22,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 12:10:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:22,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 12:10:22,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-05-06 12:10:22,031 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:22,214 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-06 12:10:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:23,018 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-06 12:10:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 12:10:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 12:10:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:23,019 INFO L225 Difference]: With dead ends: 37 [2021-05-06 12:10:23,019 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 12:10:23,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 12:10:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 12:10:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 12:10:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-06 12:10:23,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-06 12:10:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:23,023 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-06 12:10:23,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-06 12:10:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 12:10:23,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:23,023 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:23,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-06 12:10:23,024 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1070241546, now seen corresponding path program 16 times [2021-05-06 12:10:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:23,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616392122] [2021-05-06 12:10:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:23,028 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:23,028 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:23,029 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:23,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:23,232 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:23,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616392122] [2021-05-06 12:10:23,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616392122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:23,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:23,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 12:10:23,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741455908] [2021-05-06 12:10:23,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 12:10:23,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 12:10:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 12:10:23,233 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:23,692 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-06 12:10:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 12:10:23,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 12:10:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:23,692 INFO L225 Difference]: With dead ends: 35 [2021-05-06 12:10:23,692 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 12:10:23,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 12:10:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 12:10:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 12:10:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 12:10:23,696 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2021-05-06 12:10:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:23,696 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 12:10:23,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 12:10:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 12:10:23,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:23,697 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:23,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-06 12:10:23,697 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1070192727, now seen corresponding path program 17 times [2021-05-06 12:10:23,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:23,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722791364] [2021-05-06 12:10:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:23,706 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:23,706 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:23,707 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:23,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:23,947 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:23,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722791364] [2021-05-06 12:10:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [722791364] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:23,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:23,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 12:10:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548578713] [2021-05-06 12:10:23,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 12:10:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 12:10:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2021-05-06 12:10:23,948 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:24,904 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 12:10:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 12:10:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 12:10:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:24,905 INFO L225 Difference]: With dead ends: 38 [2021-05-06 12:10:24,905 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 12:10:24,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 12:10:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 12:10:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-05-06 12:10:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-06 12:10:24,915 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2021-05-06 12:10:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:24,915 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-06 12:10:24,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-06 12:10:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 12:10:24,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:24,915 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:24,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-06 12:10:24,916 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:24,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1183766902, now seen corresponding path program 17 times [2021-05-06 12:10:24,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:24,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741923204] [2021-05-06 12:10:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:24,923 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:24,923 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:24,924 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:25,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:25,179 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741923204] [2021-05-06 12:10:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [741923204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:25,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:25,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 12:10:25,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128140618] [2021-05-06 12:10:25,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 12:10:25,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 12:10:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 12:10:25,180 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:25,515 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 12:10:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:25,925 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 12:10:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 12:10:25,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 12:10:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:25,926 INFO L225 Difference]: With dead ends: 36 [2021-05-06 12:10:25,926 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 12:10:25,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 833.2ms TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 12:10:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 12:10:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 12:10:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-06 12:10:25,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2021-05-06 12:10:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:25,929 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-06 12:10:25,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-06 12:10:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 12:10:25,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:25,930 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:25,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-06 12:10:25,930 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1183815721, now seen corresponding path program 18 times [2021-05-06 12:10:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:25,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077546142] [2021-05-06 12:10:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:25,933 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:25,933 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:25,933 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:26,173 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:26,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077546142] [2021-05-06 12:10:26,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077546142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:26,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:26,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 12:10:26,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920220311] [2021-05-06 12:10:26,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 12:10:26,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:26,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 12:10:26,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2021-05-06 12:10:26,174 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:27,114 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-06 12:10:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 12:10:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 12:10:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:27,129 INFO L225 Difference]: With dead ends: 39 [2021-05-06 12:10:27,129 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 12:10:27,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1041.6ms TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 12:10:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 12:10:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-05-06 12:10:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-06 12:10:27,133 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2021-05-06 12:10:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:27,133 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-06 12:10:27,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-06 12:10:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 12:10:27,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:27,134 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:27,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-06 12:10:27,134 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1956415242, now seen corresponding path program 18 times [2021-05-06 12:10:27,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:27,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117944055] [2021-05-06 12:10:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:27,136 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:27,136 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:27,137 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:27,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:27,362 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:27,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117944055] [2021-05-06 12:10:27,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117944055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:27,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:27,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 12:10:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796275265] [2021-05-06 12:10:27,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 12:10:27,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 12:10:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 12:10:27,363 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:27,920 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-06 12:10:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 12:10:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 12:10:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:27,921 INFO L225 Difference]: With dead ends: 37 [2021-05-06 12:10:27,921 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 12:10:27,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 12:10:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 12:10:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 12:10:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 12:10:27,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2021-05-06 12:10:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:27,925 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 12:10:27,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 12:10:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 12:10:27,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:27,925 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:27,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-06 12:10:27,925 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1956366423, now seen corresponding path program 19 times [2021-05-06 12:10:27,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:27,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915137916] [2021-05-06 12:10:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:27,929 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:27,929 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:27,929 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:28,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:28,157 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915137916] [2021-05-06 12:10:28,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [915137916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:28,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:28,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 12:10:28,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622766964] [2021-05-06 12:10:28,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 12:10:28,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 12:10:28,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2021-05-06 12:10:28,159 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:28,507 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-06 12:10:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:29,421 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 12:10:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 12:10:29,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 12:10:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:29,422 INFO L225 Difference]: With dead ends: 40 [2021-05-06 12:10:29,422 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 12:10:29,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1285.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 12:10:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 12:10:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-05-06 12:10:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-06 12:10:29,426 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-05-06 12:10:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:29,426 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-06 12:10:29,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-06 12:10:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 12:10:29,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:29,427 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:29,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-06 12:10:29,427 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:29,427 INFO L82 PathProgramCache]: Analyzing trace with hash -517813898, now seen corresponding path program 19 times [2021-05-06 12:10:29,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:29,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739081198] [2021-05-06 12:10:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:29,429 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:29,429 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:29,430 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:29,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:29,706 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:29,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739081198] [2021-05-06 12:10:29,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [739081198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 12:10:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506310716] [2021-05-06 12:10:29,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 12:10:29,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:29,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 12:10:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 12:10:29,707 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:30,396 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 12:10:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 12:10:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 12:10:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:30,397 INFO L225 Difference]: With dead ends: 38 [2021-05-06 12:10:30,397 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 12:10:30,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 12:10:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 12:10:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 12:10:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-06 12:10:30,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2021-05-06 12:10:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:30,401 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-06 12:10:30,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-06 12:10:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 12:10:30,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:30,402 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:30,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-06 12:10:30,402 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash -517765079, now seen corresponding path program 20 times [2021-05-06 12:10:30,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:30,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912805795] [2021-05-06 12:10:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:30,405 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:30,405 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:30,406 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:30,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:30,700 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:30,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912805795] [2021-05-06 12:10:30,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [912805795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:30,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:30,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 12:10:30,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109362190] [2021-05-06 12:10:30,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 12:10:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 12:10:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2021-05-06 12:10:30,701 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:31,816 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-06 12:10:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 12:10:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 12:10:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:31,817 INFO L225 Difference]: With dead ends: 41 [2021-05-06 12:10:31,817 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 12:10:31,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 12:10:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 12:10:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-06 12:10:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 12:10:31,820 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-05-06 12:10:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:31,820 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 12:10:31,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 12:10:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 12:10:31,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:31,821 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:31,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-06 12:10:31,821 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:31,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1129154806, now seen corresponding path program 20 times [2021-05-06 12:10:31,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:31,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521603791] [2021-05-06 12:10:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:31,823 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:31,823 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:31,824 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:32,088 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:32,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521603791] [2021-05-06 12:10:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521603791] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:32,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:32,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 12:10:32,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332211029] [2021-05-06 12:10:32,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 12:10:32,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 12:10:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 12:10:32,089 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:32,698 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-06 12:10:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 12:10:32,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 12:10:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:32,699 INFO L225 Difference]: With dead ends: 39 [2021-05-06 12:10:32,699 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 12:10:32,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 12:10:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 12:10:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 12:10:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 12:10:32,707 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-05-06 12:10:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:32,707 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 12:10:32,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 12:10:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 12:10:32,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:32,707 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:32,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-06 12:10:32,707 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1129203625, now seen corresponding path program 21 times [2021-05-06 12:10:32,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:32,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966244065] [2021-05-06 12:10:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:32,710 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:32,710 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:32,711 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:32,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:32,989 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966244065] [2021-05-06 12:10:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966244065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:32,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:32,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 12:10:32,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698930336] [2021-05-06 12:10:32,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 12:10:32,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:32,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 12:10:32,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2021-05-06 12:10:32,990 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:34,170 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 12:10:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 12:10:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 12:10:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:34,171 INFO L225 Difference]: With dead ends: 42 [2021-05-06 12:10:34,171 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 12:10:34,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1282.7ms TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 12:10:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 12:10:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-05-06 12:10:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-06 12:10:34,175 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2021-05-06 12:10:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:34,175 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-06 12:10:34,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-06 12:10:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 12:10:34,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:34,175 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:34,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-06 12:10:34,175 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash 645577078, now seen corresponding path program 21 times [2021-05-06 12:10:34,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:34,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545883690] [2021-05-06 12:10:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:34,180 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:34,180 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:34,181 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:34,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:34,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:34,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545883690] [2021-05-06 12:10:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [545883690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:34,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:34,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 12:10:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44515767] [2021-05-06 12:10:34,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 12:10:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 12:10:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 12:10:34,624 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:35,397 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 12:10:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 12:10:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 12:10:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:35,397 INFO L225 Difference]: With dead ends: 40 [2021-05-06 12:10:35,398 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 12:10:35,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 919.1ms TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 12:10:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 12:10:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 12:10:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-06 12:10:35,418 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2021-05-06 12:10:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:35,419 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-06 12:10:35,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-06 12:10:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 12:10:35,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:35,420 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:35,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-06 12:10:35,420 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash 645625897, now seen corresponding path program 22 times [2021-05-06 12:10:35,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:35,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392263319] [2021-05-06 12:10:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:35,424 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:35,425 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:35,425 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:35,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:35,770 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392263319] [2021-05-06 12:10:35,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392263319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:35,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:35,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 12:10:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984388966] [2021-05-06 12:10:35,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 12:10:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:35,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 12:10:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2021-05-06 12:10:35,771 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:37,037 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-06 12:10:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 12:10:37,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 12:10:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:37,038 INFO L225 Difference]: With dead ends: 43 [2021-05-06 12:10:37,038 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 12:10:37,038 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1398.9ms TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 12:10:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 12:10:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-05-06 12:10:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-05-06 12:10:37,047 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2021-05-06 12:10:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:37,047 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-05-06 12:10:37,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-05-06 12:10:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:10:37,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:37,048 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:37,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-06 12:10:37,048 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1460430602, now seen corresponding path program 22 times [2021-05-06 12:10:37,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:37,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547751802] [2021-05-06 12:10:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:37,051 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:37,051 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:37,052 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:37,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:37,478 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:37,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547751802] [2021-05-06 12:10:37,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [547751802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:37,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:37,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 12:10:37,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939642778] [2021-05-06 12:10:37,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 12:10:37,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 12:10:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 12:10:37,479 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:38,150 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-06 12:10:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 12:10:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-06 12:10:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:38,151 INFO L225 Difference]: With dead ends: 41 [2021-05-06 12:10:38,151 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 12:10:38,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 966.1ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 12:10:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 12:10:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 12:10:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 12:10:38,155 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2021-05-06 12:10:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:38,155 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 12:10:38,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 12:10:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 12:10:38,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:38,155 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:38,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-06 12:10:38,155 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1460381783, now seen corresponding path program 23 times [2021-05-06 12:10:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:38,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526889402] [2021-05-06 12:10:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:38,158 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:38,159 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:38,159 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:38,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:38,561 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526889402] [2021-05-06 12:10:38,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [526889402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:38,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:38,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 12:10:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433639958] [2021-05-06 12:10:38,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 12:10:38,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 12:10:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-05-06 12:10:38,562 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:39,902 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 12:10:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 12:10:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-06 12:10:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:39,903 INFO L225 Difference]: With dead ends: 44 [2021-05-06 12:10:39,903 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 12:10:39,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1470.4ms TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 12:10:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 12:10:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-05-06 12:10:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-06 12:10:39,907 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2021-05-06 12:10:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:39,907 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-06 12:10:39,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-06 12:10:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 12:10:39,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:39,907 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:39,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-06 12:10:39,908 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1972808054, now seen corresponding path program 23 times [2021-05-06 12:10:39,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:39,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456031310] [2021-05-06 12:10:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:39,910 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:39,910 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:39,910 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:40,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:40,239 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:40,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456031310] [2021-05-06 12:10:40,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [456031310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:40,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:40,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 12:10:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070196282] [2021-05-06 12:10:40,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 12:10:40,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:40,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 12:10:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 12:10:40,240 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:41,073 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 12:10:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 12:10:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 12:10:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:41,074 INFO L225 Difference]: With dead ends: 42 [2021-05-06 12:10:41,074 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 12:10:41,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 981.8ms TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 12:10:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 12:10:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 12:10:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-06 12:10:41,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2021-05-06 12:10:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:41,078 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-06 12:10:41,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-06 12:10:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 12:10:41,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:41,078 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:41,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-06 12:10:41,078 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1972856873, now seen corresponding path program 24 times [2021-05-06 12:10:41,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:41,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924010880] [2021-05-06 12:10:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:41,081 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:41,081 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:41,081 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:41,433 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:41,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924010880] [2021-05-06 12:10:41,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924010880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:41,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:41,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-06 12:10:41,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574697173] [2021-05-06 12:10:41,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 12:10:41,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 12:10:41,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2021-05-06 12:10:41,434 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:42,729 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-06 12:10:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 12:10:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 12:10:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:42,730 INFO L225 Difference]: With dead ends: 45 [2021-05-06 12:10:42,730 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 12:10:42,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1490.9ms TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 12:10:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 12:10:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 12:10:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-06 12:10:42,734 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-06 12:10:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:42,734 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-06 12:10:42,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-06 12:10:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 12:10:42,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:42,735 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:42,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-06 12:10:42,735 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1029023990, now seen corresponding path program 24 times [2021-05-06 12:10:42,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:42,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332901085] [2021-05-06 12:10:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:42,738 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:42,738 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:42,738 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:43,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:43,066 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:43,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332901085] [2021-05-06 12:10:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [332901085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:43,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:43,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-06 12:10:43,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162230838] [2021-05-06 12:10:43,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 12:10:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 12:10:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 12:10:43,067 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:43,869 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-06 12:10:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 12:10:43,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 12:10:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:43,873 INFO L225 Difference]: With dead ends: 43 [2021-05-06 12:10:43,873 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 12:10:43,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 12:10:43,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 12:10:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 12:10:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 12:10:43,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2021-05-06 12:10:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:43,878 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 12:10:43,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 12:10:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 12:10:43,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:43,878 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:43,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-06 12:10:43,878 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1029072809, now seen corresponding path program 25 times [2021-05-06 12:10:43,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:43,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267291998] [2021-05-06 12:10:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:43,882 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:43,882 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:43,883 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:44,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:44,246 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:44,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267291998] [2021-05-06 12:10:44,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [267291998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:44,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:44,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 12:10:44,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886945810] [2021-05-06 12:10:44,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 12:10:44,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 12:10:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2021-05-06 12:10:44,247 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:45,728 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 12:10:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 12:10:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 12:10:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:45,729 INFO L225 Difference]: With dead ends: 46 [2021-05-06 12:10:45,729 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 12:10:45,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1656.1ms TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 12:10:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 12:10:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-05-06 12:10:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-06 12:10:45,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2021-05-06 12:10:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:45,733 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-06 12:10:45,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-06 12:10:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 12:10:45,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:45,733 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:45,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-06 12:10:45,733 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1836489078, now seen corresponding path program 25 times [2021-05-06 12:10:45,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:45,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025885191] [2021-05-06 12:10:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:45,735 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:45,736 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:45,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:46,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:46,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:46,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025885191] [2021-05-06 12:10:46,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025885191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:46,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:46,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 12:10:46,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425871749] [2021-05-06 12:10:46,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 12:10:46,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:46,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 12:10:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 12:10:46,103 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:47,059 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 12:10:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 12:10:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 12:10:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:47,061 INFO L225 Difference]: With dead ends: 44 [2021-05-06 12:10:47,061 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 12:10:47,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1120.4ms TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 12:10:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 12:10:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 12:10:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-06 12:10:47,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2021-05-06 12:10:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:47,065 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-06 12:10:47,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-06 12:10:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 12:10:47,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:47,066 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:47,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-06 12:10:47,066 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:47,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1836537897, now seen corresponding path program 26 times [2021-05-06 12:10:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:47,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159047662] [2021-05-06 12:10:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:47,069 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:47,069 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:47,070 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:47,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:47,794 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:47,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159047662] [2021-05-06 12:10:47,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159047662] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:47,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:47,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-06 12:10:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076827268] [2021-05-06 12:10:47,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 12:10:47,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:47,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 12:10:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2021-05-06 12:10:47,795 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:49,351 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-06 12:10:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 12:10:49,352 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 12:10:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:49,352 INFO L225 Difference]: With dead ends: 47 [2021-05-06 12:10:49,352 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 12:10:49,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2019.5ms TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 12:10:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 12:10:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-05-06 12:10:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-06 12:10:49,356 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-05-06 12:10:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:49,357 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-06 12:10:49,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-06 12:10:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 12:10:49,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:49,357 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:49,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-06 12:10:49,357 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1098103030, now seen corresponding path program 26 times [2021-05-06 12:10:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:49,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880362337] [2021-05-06 12:10:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:49,366 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:49,367 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:49,370 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:49,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:49,836 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:49,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880362337] [2021-05-06 12:10:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880362337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:49,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:49,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-06 12:10:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353091733] [2021-05-06 12:10:49,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 12:10:49,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 12:10:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 12:10:49,838 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:50,824 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-06 12:10:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 12:10:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 12:10:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:50,824 INFO L225 Difference]: With dead ends: 45 [2021-05-06 12:10:50,824 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 12:10:50,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 12:10:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 12:10:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 12:10:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 12:10:50,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2021-05-06 12:10:50,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:50,829 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 12:10:50,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 12:10:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 12:10:50,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:50,829 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:50,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-06 12:10:50,829 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1098151849, now seen corresponding path program 27 times [2021-05-06 12:10:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:50,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982532903] [2021-05-06 12:10:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:50,832 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:50,832 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:50,832 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:51,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:51,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982532903] [2021-05-06 12:10:51,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1982532903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:51,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:51,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 12:10:51,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664939822] [2021-05-06 12:10:51,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 12:10:51,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 12:10:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2021-05-06 12:10:51,310 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:52,957 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 12:10:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 12:10:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 12:10:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:52,957 INFO L225 Difference]: With dead ends: 48 [2021-05-06 12:10:52,957 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 12:10:52,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1958.8ms TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 12:10:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 12:10:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-05-06 12:10:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-06 12:10:52,961 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2021-05-06 12:10:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:52,961 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-06 12:10:52,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-06 12:10:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 12:10:52,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:52,962 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:52,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-06 12:10:52,962 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash -317027978, now seen corresponding path program 27 times [2021-05-06 12:10:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:52,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598759637] [2021-05-06 12:10:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:52,964 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:52,964 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:52,965 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:53,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:53,447 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:53,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598759637] [2021-05-06 12:10:53,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598759637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:53,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:53,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 12:10:53,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362395815] [2021-05-06 12:10:53,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 12:10:53,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 12:10:53,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 12:10:53,448 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:54,438 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 12:10:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 12:10:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 12:10:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:54,438 INFO L225 Difference]: With dead ends: 46 [2021-05-06 12:10:54,438 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 12:10:54,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1263.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 12:10:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 12:10:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 12:10:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-06 12:10:54,442 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2021-05-06 12:10:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:54,442 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-06 12:10:54,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-06 12:10:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 12:10:54,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:54,443 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:54,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-06 12:10:54,443 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:54,443 INFO L82 PathProgramCache]: Analyzing trace with hash -316979159, now seen corresponding path program 28 times [2021-05-06 12:10:54,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:54,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91210668] [2021-05-06 12:10:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:54,445 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:54,445 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:54,446 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:54,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:54,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:54,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91210668] [2021-05-06 12:10:54,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [91210668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:54,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:54,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-06 12:10:54,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682055929] [2021-05-06 12:10:54,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 12:10:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 12:10:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2021-05-06 12:10:54,878 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:56,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:56,588 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-06 12:10:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 12:10:56,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 12:10:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:56,589 INFO L225 Difference]: With dead ends: 49 [2021-05-06 12:10:56,589 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 12:10:56,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1926.0ms TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 12:10:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 12:10:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-05-06 12:10:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-06 12:10:56,607 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2021-05-06 12:10:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:56,607 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-06 12:10:56,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-06 12:10:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 12:10:56,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:56,608 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:56,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-06 12:10:56,608 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1236416266, now seen corresponding path program 28 times [2021-05-06 12:10:56,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:56,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490996611] [2021-05-06 12:10:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:56,638 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:56,638 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:56,639 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:57,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:57,144 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:57,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490996611] [2021-05-06 12:10:57,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [490996611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:57,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:57,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-06 12:10:57,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301305401] [2021-05-06 12:10:57,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 12:10:57,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:57,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 12:10:57,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 12:10:57,145 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:10:58,134 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-06 12:10:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 12:10:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-06 12:10:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:10:58,135 INFO L225 Difference]: With dead ends: 47 [2021-05-06 12:10:58,135 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 12:10:58,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 12:10:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 12:10:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 12:10:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 12:10:58,140 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2021-05-06 12:10:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:10:58,140 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 12:10:58,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:10:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 12:10:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 12:10:58,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:10:58,140 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:10:58,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-06 12:10:58,140 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:10:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:10:58,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1236367447, now seen corresponding path program 29 times [2021-05-06 12:10:58,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:10:58,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366373738] [2021-05-06 12:10:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:10:58,142 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:10:58,143 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:10:58,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:10:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:58,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:10:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:10:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:10:58,637 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:10:58,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366373738] [2021-05-06 12:10:58,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [366373738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:10:58,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:10:58,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 12:10:58,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820831021] [2021-05-06 12:10:58,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 12:10:58,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:10:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 12:10:58,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 12:10:58,638 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:00,247 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 12:11:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 12:11:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-06 12:11:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:00,248 INFO L225 Difference]: With dead ends: 50 [2021-05-06 12:11:00,248 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 12:11:00,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1927.3ms TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 12:11:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 12:11:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-05-06 12:11:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 12:11:00,252 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2021-05-06 12:11:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:00,253 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 12:11:00,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 12:11:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 12:11:00,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:00,253 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:00,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-06 12:11:00,253 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 327317878, now seen corresponding path program 29 times [2021-05-06 12:11:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521726860] [2021-05-06 12:11:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:00,255 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:00,255 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:00,256 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:00,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:00,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:00,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521726860] [2021-05-06 12:11:00,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [521726860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:00,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:00,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 12:11:00,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956209306] [2021-05-06 12:11:00,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 12:11:00,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:00,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 12:11:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 12:11:00,727 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:01,734 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 12:11:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 12:11:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 12:11:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:01,734 INFO L225 Difference]: With dead ends: 48 [2021-05-06 12:11:01,734 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 12:11:01,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1284.4ms TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 12:11:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 12:11:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 12:11:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-06 12:11:01,739 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2021-05-06 12:11:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:01,739 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-06 12:11:01,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-06 12:11:01,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 12:11:01,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:01,739 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:01,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-06 12:11:01,740 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:01,740 INFO L82 PathProgramCache]: Analyzing trace with hash 327366697, now seen corresponding path program 30 times [2021-05-06 12:11:01,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:01,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674322364] [2021-05-06 12:11:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:01,743 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:01,743 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:01,744 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:02,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:02,255 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:02,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674322364] [2021-05-06 12:11:02,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [674322364] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:02,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:02,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-06 12:11:02,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889425143] [2021-05-06 12:11:02,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 12:11:02,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:02,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 12:11:02,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 12:11:02,266 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:03,946 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-06 12:11:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 12:11:03,946 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 12:11:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:03,947 INFO L225 Difference]: With dead ends: 51 [2021-05-06 12:11:03,947 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 12:11:03,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2023.2ms TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 12:11:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 12:11:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-06 12:11:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-05-06 12:11:03,951 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2021-05-06 12:11:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:03,951 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-05-06 12:11:03,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-05-06 12:11:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 12:11:03,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:03,952 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:03,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-06 12:11:03,952 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1558436086, now seen corresponding path program 30 times [2021-05-06 12:11:03,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:03,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073828975] [2021-05-06 12:11:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:03,955 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:03,955 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:03,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:04,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:04,461 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:04,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073828975] [2021-05-06 12:11:04,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073828975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:04,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:04,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-06 12:11:04,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711812160] [2021-05-06 12:11:04,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 12:11:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 12:11:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 12:11:04,462 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:05,514 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-06 12:11:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 12:11:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-06 12:11:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:05,515 INFO L225 Difference]: With dead ends: 49 [2021-05-06 12:11:05,515 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 12:11:05,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1346.5ms TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 12:11:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 12:11:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 12:11:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 12:11:05,519 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2021-05-06 12:11:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:05,519 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 12:11:05,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 12:11:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 12:11:05,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:05,520 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:05,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-06 12:11:05,520 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:05,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1558484905, now seen corresponding path program 31 times [2021-05-06 12:11:05,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:05,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828309179] [2021-05-06 12:11:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:05,522 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:05,522 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:05,523 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:06,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:06,061 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:06,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828309179] [2021-05-06 12:11:06,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [828309179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:06,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:06,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 12:11:06,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234747124] [2021-05-06 12:11:06,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 12:11:06,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:06,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 12:11:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 12:11:06,062 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:07,861 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 12:11:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 12:11:07,861 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-06 12:11:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:07,861 INFO L225 Difference]: With dead ends: 52 [2021-05-06 12:11:07,861 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 12:11:07,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2156.7ms TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 12:11:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 12:11:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-05-06 12:11:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-06 12:11:07,866 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2021-05-06 12:11:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:07,866 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-06 12:11:07,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-06 12:11:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 12:11:07,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:07,866 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:07,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-06 12:11:07,866 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:07,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1068394870, now seen corresponding path program 31 times [2021-05-06 12:11:07,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:07,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422775159] [2021-05-06 12:11:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:07,868 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:07,868 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:07,869 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:08,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:08,409 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:08,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422775159] [2021-05-06 12:11:08,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [422775159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:08,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:08,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 12:11:08,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31758419] [2021-05-06 12:11:08,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 12:11:08,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:08,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 12:11:08,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 12:11:08,409 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:09,548 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 12:11:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 12:11:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 12:11:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:09,548 INFO L225 Difference]: With dead ends: 50 [2021-05-06 12:11:09,548 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 12:11:09,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1453.1ms TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 12:11:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 12:11:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 12:11:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-06 12:11:09,553 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2021-05-06 12:11:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:09,553 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-06 12:11:09,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-06 12:11:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 12:11:09,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:09,553 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:09,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-06 12:11:09,553 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443689, now seen corresponding path program 32 times [2021-05-06 12:11:09,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:09,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035398716] [2021-05-06 12:11:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:09,556 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:09,556 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:09,557 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:10,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:10,141 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035398716] [2021-05-06 12:11:10,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035398716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:10,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:10,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-06 12:11:10,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625976119] [2021-05-06 12:11:10,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 12:11:10,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 12:11:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 12:11:10,142 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:12,000 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-06 12:11:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 12:11:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 12:11:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:12,001 INFO L225 Difference]: With dead ends: 53 [2021-05-06 12:11:12,001 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 12:11:12,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2222.6ms TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 12:11:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 12:11:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-05-06 12:11:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 12:11:12,005 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2021-05-06 12:11:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:12,005 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 12:11:12,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 12:11:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 12:11:12,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:12,006 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:12,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-06 12:11:12,006 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1237980938, now seen corresponding path program 32 times [2021-05-06 12:11:12,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:12,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104090099] [2021-05-06 12:11:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:12,008 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:12,008 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:12,009 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:12,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:12,558 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:12,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104090099] [2021-05-06 12:11:12,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104090099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:12,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:12,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-06 12:11:12,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583674780] [2021-05-06 12:11:12,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 12:11:12,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 12:11:12,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 12:11:12,559 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:13,656 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-06 12:11:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 12:11:13,657 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 12:11:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:13,657 INFO L225 Difference]: With dead ends: 51 [2021-05-06 12:11:13,657 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 12:11:13,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1485.3ms TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 12:11:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 12:11:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 12:11:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 12:11:13,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2021-05-06 12:11:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:13,661 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 12:11:13,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 12:11:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 12:11:13,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:13,662 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:13,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-06 12:11:13,662 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1237932119, now seen corresponding path program 33 times [2021-05-06 12:11:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:13,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731847307] [2021-05-06 12:11:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:13,666 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:13,666 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:13,667 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:14,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:14,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:14,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731847307] [2021-05-06 12:11:14,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [731847307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:14,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:14,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 12:11:14,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899832446] [2021-05-06 12:11:14,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 12:11:14,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 12:11:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 12:11:14,246 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:16,260 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 12:11:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 12:11:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 12:11:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:16,260 INFO L225 Difference]: With dead ends: 54 [2021-05-06 12:11:16,260 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 12:11:16,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2316.7ms TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 12:11:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 12:11:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-05-06 12:11:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-05-06 12:11:16,265 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2021-05-06 12:11:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:16,265 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-05-06 12:11:16,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-05-06 12:11:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 12:11:16,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:16,265 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:16,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-06 12:11:16,266 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash 278813046, now seen corresponding path program 33 times [2021-05-06 12:11:16,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:16,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322732914] [2021-05-06 12:11:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:16,268 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:16,269 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:16,269 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:16,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:16,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322732914] [2021-05-06 12:11:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [322732914] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:16,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:16,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 12:11:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306875472] [2021-05-06 12:11:16,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 12:11:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 12:11:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 12:11:16,964 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:18,202 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 12:11:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 12:11:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 12:11:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:18,202 INFO L225 Difference]: With dead ends: 52 [2021-05-06 12:11:18,202 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 12:11:18,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1638.8ms TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 12:11:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 12:11:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 12:11:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-06 12:11:18,207 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2021-05-06 12:11:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:18,207 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-06 12:11:18,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-06 12:11:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 12:11:18,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:18,208 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:18,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-06 12:11:18,208 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 278861865, now seen corresponding path program 34 times [2021-05-06 12:11:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:18,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653649781] [2021-05-06 12:11:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:18,210 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:18,210 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:18,210 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:18,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:18,868 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:18,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653649781] [2021-05-06 12:11:18,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [653649781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:18,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:18,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 12:11:18,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274080290] [2021-05-06 12:11:18,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 12:11:18,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:18,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 12:11:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 12:11:18,869 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:20,938 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-06 12:11:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 12:11:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 12:11:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:20,939 INFO L225 Difference]: With dead ends: 55 [2021-05-06 12:11:20,939 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 12:11:20,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2484.8ms TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 12:11:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 12:11:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-05-06 12:11:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-05-06 12:11:20,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2021-05-06 12:11:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:20,944 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-05-06 12:11:20,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-05-06 12:11:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 12:11:20,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:20,944 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:20,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-06 12:11:20,944 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash 54786294, now seen corresponding path program 34 times [2021-05-06 12:11:20,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:20,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558834068] [2021-05-06 12:11:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:20,947 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:20,947 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:20,947 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:21,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:21,580 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:21,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558834068] [2021-05-06 12:11:21,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558834068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:21,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:21,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 12:11:21,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089858718] [2021-05-06 12:11:21,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 12:11:21,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:21,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 12:11:21,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 12:11:21,581 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:22,882 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-06 12:11:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 12:11:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-06 12:11:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:22,883 INFO L225 Difference]: With dead ends: 53 [2021-05-06 12:11:22,883 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 12:11:22,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1680.0ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 12:11:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 12:11:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 12:11:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 12:11:22,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2021-05-06 12:11:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:22,888 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 12:11:22,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 12:11:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 12:11:22,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:22,888 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:22,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-06 12:11:22,888 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash 54835113, now seen corresponding path program 35 times [2021-05-06 12:11:22,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:22,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46864575] [2021-05-06 12:11:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:22,890 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:22,890 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:22,891 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:23,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:23,497 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:23,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46864575] [2021-05-06 12:11:23,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [46864575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:23,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:23,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 12:11:23,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894362210] [2021-05-06 12:11:23,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 12:11:23,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:23,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 12:11:23,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 12:11:23,498 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:25,582 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 12:11:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 12:11:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-06 12:11:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:25,583 INFO L225 Difference]: With dead ends: 56 [2021-05-06 12:11:25,583 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 12:11:25,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2458.0ms TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 12:11:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 12:11:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-05-06 12:11:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-06 12:11:25,587 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2021-05-06 12:11:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:25,587 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-06 12:11:25,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-06 12:11:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 12:11:25,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:25,588 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:25,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-06 12:11:25,588 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:25,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1699891574, now seen corresponding path program 35 times [2021-05-06 12:11:25,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:25,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804007947] [2021-05-06 12:11:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:25,593 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:25,593 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:25,594 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:26,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:26,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804007947] [2021-05-06 12:11:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804007947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:26,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:26,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 12:11:26,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001833885] [2021-05-06 12:11:26,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 12:11:26,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 12:11:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 12:11:26,199 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:27,502 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 12:11:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 12:11:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 12:11:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:27,503 INFO L225 Difference]: With dead ends: 54 [2021-05-06 12:11:27,503 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 12:11:27,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1677.9ms TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 12:11:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 12:11:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 12:11:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-06 12:11:27,508 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2021-05-06 12:11:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:27,508 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-06 12:11:27,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-06 12:11:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 12:11:27,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:27,508 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:27,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-06 12:11:27,508 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:27,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1699940393, now seen corresponding path program 36 times [2021-05-06 12:11:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:27,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638989044] [2021-05-06 12:11:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:27,511 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:27,511 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:27,511 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:28,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:28,165 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:28,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638989044] [2021-05-06 12:11:28,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638989044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:28,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:28,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-06 12:11:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667586140] [2021-05-06 12:11:28,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 12:11:28,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 12:11:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 12:11:28,167 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:30,348 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-06 12:11:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 12:11:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 12:11:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:30,348 INFO L225 Difference]: With dead ends: 57 [2021-05-06 12:11:30,348 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 12:11:30,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2580.2ms TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 12:11:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 12:11:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-05-06 12:11:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-05-06 12:11:30,353 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2021-05-06 12:11:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:30,353 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-05-06 12:11:30,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-05-06 12:11:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 12:11:30,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:30,354 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:30,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-06 12:11:30,354 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1158547702, now seen corresponding path program 36 times [2021-05-06 12:11:30,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:30,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724299846] [2021-05-06 12:11:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:30,362 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:30,362 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:30,362 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:31,030 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:31,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724299846] [2021-05-06 12:11:31,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [724299846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:31,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:31,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-06 12:11:31,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673521842] [2021-05-06 12:11:31,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 12:11:31,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:31,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 12:11:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 12:11:31,031 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:32,283 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-06 12:11:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 12:11:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-06 12:11:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:32,284 INFO L225 Difference]: With dead ends: 55 [2021-05-06 12:11:32,284 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 12:11:32,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1778.5ms TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 12:11:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 12:11:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 12:11:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 12:11:32,289 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2021-05-06 12:11:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:32,289 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 12:11:32,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 12:11:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 12:11:32,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:32,289 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:32,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-06 12:11:32,290 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1158596521, now seen corresponding path program 37 times [2021-05-06 12:11:32,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:32,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478206156] [2021-05-06 12:11:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:32,292 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:32,292 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:32,292 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:32,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:32,975 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478206156] [2021-05-06 12:11:32,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [478206156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:32,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:32,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 12:11:32,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074067797] [2021-05-06 12:11:32,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 12:11:32,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 12:11:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 12:11:32,976 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:35,153 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 12:11:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 12:11:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-06 12:11:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:35,153 INFO L225 Difference]: With dead ends: 58 [2021-05-06 12:11:35,154 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 12:11:35,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2674.3ms TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 12:11:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 12:11:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-05-06 12:11:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 12:11:35,158 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2021-05-06 12:11:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:35,158 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 12:11:35,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 12:11:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 12:11:35,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:35,159 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:35,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-06 12:11:35,159 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1556756854, now seen corresponding path program 37 times [2021-05-06 12:11:35,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:35,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116690206] [2021-05-06 12:11:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:35,161 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:35,161 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:35,162 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:35,840 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116690206] [2021-05-06 12:11:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116690206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 12:11:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971572979] [2021-05-06 12:11:35,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 12:11:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:35,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 12:11:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 12:11:35,841 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:37,306 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 12:11:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 12:11:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 12:11:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:37,307 INFO L225 Difference]: With dead ends: 56 [2021-05-06 12:11:37,307 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 12:11:37,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1872.1ms TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 12:11:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 12:11:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 12:11:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-06 12:11:37,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2021-05-06 12:11:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:37,312 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-06 12:11:37,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-06 12:11:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 12:11:37,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:37,313 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:37,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-06 12:11:37,313 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:37,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1556805673, now seen corresponding path program 38 times [2021-05-06 12:11:37,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:37,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395833665] [2021-05-06 12:11:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:37,315 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:37,315 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:37,315 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:38,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:38,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:38,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395833665] [2021-05-06 12:11:38,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395833665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:38,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:38,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-06 12:11:38,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081772392] [2021-05-06 12:11:38,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 12:11:38,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 12:11:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 12:11:38,054 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:40,392 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-06 12:11:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 12:11:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 12:11:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:40,394 INFO L225 Difference]: With dead ends: 59 [2021-05-06 12:11:40,394 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 12:11:40,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2821.7ms TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 12:11:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 12:11:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-06 12:11:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-05-06 12:11:40,399 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2021-05-06 12:11:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:40,399 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-05-06 12:11:40,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-05-06 12:11:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 12:11:40,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:40,399 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:40,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-06 12:11:40,400 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1016338678, now seen corresponding path program 38 times [2021-05-06 12:11:40,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:40,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062186452] [2021-05-06 12:11:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:40,402 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:40,402 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:40,402 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:41,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:41,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:41,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062186452] [2021-05-06 12:11:41,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1062186452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:41,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:41,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-06 12:11:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448786891] [2021-05-06 12:11:41,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 12:11:41,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 12:11:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 12:11:41,113 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:42,561 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-06 12:11:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 12:11:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 12:11:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:42,561 INFO L225 Difference]: With dead ends: 57 [2021-05-06 12:11:42,561 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 12:11:42,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1972.8ms TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 12:11:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 12:11:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 12:11:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 12:11:42,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2021-05-06 12:11:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:42,566 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 12:11:42,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 12:11:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 12:11:42,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:42,567 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:42,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-06 12:11:42,567 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1016387497, now seen corresponding path program 39 times [2021-05-06 12:11:42,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:42,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054176506] [2021-05-06 12:11:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:42,569 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:42,569 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:42,569 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:43,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:43,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:43,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054176506] [2021-05-06 12:11:43,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054176506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:43,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:43,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 12:11:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305193548] [2021-05-06 12:11:43,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 12:11:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 12:11:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 12:11:43,306 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:45,717 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 12:11:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 12:11:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 12:11:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:45,717 INFO L225 Difference]: With dead ends: 60 [2021-05-06 12:11:45,717 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 12:11:45,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 2890.9ms TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 12:11:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 12:11:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-05-06 12:11:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-06 12:11:45,722 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2021-05-06 12:11:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:45,722 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-06 12:11:45,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-06 12:11:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 12:11:45,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:45,723 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:45,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-06 12:11:45,723 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1443244406, now seen corresponding path program 39 times [2021-05-06 12:11:45,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:45,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118243275] [2021-05-06 12:11:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:45,725 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:45,725 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:45,726 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:46,471 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:46,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118243275] [2021-05-06 12:11:46,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118243275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:46,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:46,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 12:11:46,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903213415] [2021-05-06 12:11:46,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 12:11:46,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 12:11:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 12:11:46,472 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:47,957 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 12:11:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 12:11:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 12:11:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:47,958 INFO L225 Difference]: With dead ends: 58 [2021-05-06 12:11:47,958 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 12:11:47,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2046.9ms TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 12:11:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 12:11:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 12:11:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-06 12:11:47,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2021-05-06 12:11:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:47,963 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-06 12:11:47,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-06 12:11:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 12:11:47,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:47,963 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:47,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-06 12:11:47,963 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1443293225, now seen corresponding path program 40 times [2021-05-06 12:11:47,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:47,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206286838] [2021-05-06 12:11:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:47,969 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:47,969 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:47,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:48,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:48,760 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:48,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206286838] [2021-05-06 12:11:48,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206286838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:48,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:48,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-06 12:11:48,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109202637] [2021-05-06 12:11:48,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 12:11:48,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 12:11:48,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 12:11:48,761 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:51,328 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-06 12:11:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 12:11:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 12:11:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:51,329 INFO L225 Difference]: With dead ends: 61 [2021-05-06 12:11:51,329 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 12:11:51,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 3065.0ms TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 12:11:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 12:11:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-05-06 12:11:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-05-06 12:11:51,334 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2021-05-06 12:11:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:51,334 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-05-06 12:11:51,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-05-06 12:11:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 12:11:51,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:51,334 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:51,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-06 12:11:51,334 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:51,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1792420086, now seen corresponding path program 40 times [2021-05-06 12:11:51,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:51,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137999561] [2021-05-06 12:11:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:51,336 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:51,337 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:51,337 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:52,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:52,107 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:52,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137999561] [2021-05-06 12:11:52,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137999561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:52,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:52,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-06 12:11:52,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363731757] [2021-05-06 12:11:52,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 12:11:52,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 12:11:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 12:11:52,108 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:53,679 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-06 12:11:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 12:11:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-06 12:11:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:53,680 INFO L225 Difference]: With dead ends: 59 [2021-05-06 12:11:53,680 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 12:11:53,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2134.8ms TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 12:11:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 12:11:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 12:11:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 12:11:53,685 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2021-05-06 12:11:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:53,685 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 12:11:53,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 12:11:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 12:11:53,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:53,685 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:53,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-06 12:11:53,686 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1792468905, now seen corresponding path program 41 times [2021-05-06 12:11:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13727004] [2021-05-06 12:11:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:53,688 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:53,688 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:53,688 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:54,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:54,493 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:54,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13727004] [2021-05-06 12:11:54,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [13727004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:54,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:54,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-06 12:11:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733042680] [2021-05-06 12:11:54,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 12:11:54,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 12:11:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 12:11:54,494 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:57,093 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 12:11:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 12:11:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-06 12:11:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:57,094 INFO L225 Difference]: With dead ends: 62 [2021-05-06 12:11:57,094 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 12:11:57,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3123.1ms TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 12:11:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 12:11:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-05-06 12:11:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-05-06 12:11:57,099 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2021-05-06 12:11:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:57,099 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-05-06 12:11:57,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-05-06 12:11:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 12:11:57,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:57,099 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:57,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-06 12:11:57,100 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash -268035722, now seen corresponding path program 41 times [2021-05-06 12:11:57,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:57,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25528964] [2021-05-06 12:11:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:57,102 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:57,102 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:57,102 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:57,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:11:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:11:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:11:57,938 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:11:57,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25528964] [2021-05-06 12:11:57,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [25528964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:11:57,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:11:57,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-06 12:11:57,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928455557] [2021-05-06 12:11:57,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 12:11:57,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:11:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 12:11:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 12:11:57,939 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:11:59,613 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 12:11:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 12:11:59,614 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 12:11:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:11:59,614 INFO L225 Difference]: With dead ends: 60 [2021-05-06 12:11:59,614 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 12:11:59,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2240.1ms TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 12:11:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 12:11:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 12:11:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-06 12:11:59,620 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2021-05-06 12:11:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:11:59,620 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-06 12:11:59,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:11:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-06 12:11:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 12:11:59,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:11:59,620 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:11:59,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-06 12:11:59,620 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:11:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:11:59,620 INFO L82 PathProgramCache]: Analyzing trace with hash -267986903, now seen corresponding path program 42 times [2021-05-06 12:11:59,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:11:59,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221316525] [2021-05-06 12:11:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:11:59,623 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:11:59,623 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:11:59,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:11:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:00,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:00,476 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221316525] [2021-05-06 12:12:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221316525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:00,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:00,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-06 12:12:00,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137742045] [2021-05-06 12:12:00,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 12:12:00,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 12:12:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 12:12:00,477 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:03,170 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-06 12:12:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 12:12:03,170 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 12:12:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:03,170 INFO L225 Difference]: With dead ends: 63 [2021-05-06 12:12:03,171 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 12:12:03,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 3277.7ms TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 12:12:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 12:12:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-05-06 12:12:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-05-06 12:12:03,176 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2021-05-06 12:12:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:03,176 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-05-06 12:12:03,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-05-06 12:12:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 12:12:03,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:03,176 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:03,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-06 12:12:03,177 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash 282343670, now seen corresponding path program 42 times [2021-05-06 12:12:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:03,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487689689] [2021-05-06 12:12:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:03,180 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:03,180 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:03,181 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:04,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:04,060 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487689689] [2021-05-06 12:12:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [487689689] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:04,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:04,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-06 12:12:04,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931505300] [2021-05-06 12:12:04,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 12:12:04,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:04,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 12:12:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 12:12:04,061 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:05,709 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-06 12:12:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 12:12:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-06 12:12:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:05,710 INFO L225 Difference]: With dead ends: 61 [2021-05-06 12:12:05,710 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 12:12:05,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2301.3ms TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 12:12:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 12:12:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 12:12:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 12:12:05,715 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2021-05-06 12:12:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:05,715 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 12:12:05,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 12:12:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 12:12:05,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:05,716 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:05,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-06 12:12:05,717 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:05,717 INFO L82 PathProgramCache]: Analyzing trace with hash 282392489, now seen corresponding path program 43 times [2021-05-06 12:12:05,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:05,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757570394] [2021-05-06 12:12:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:05,728 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:05,728 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:05,729 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:06,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:06,603 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:06,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757570394] [2021-05-06 12:12:06,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757570394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:06,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:06,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-06 12:12:06,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057619573] [2021-05-06 12:12:06,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 12:12:06,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:06,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 12:12:06,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 12:12:06,604 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:09,344 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 12:12:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 12:12:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-06 12:12:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:09,346 INFO L225 Difference]: With dead ends: 64 [2021-05-06 12:12:09,346 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 12:12:09,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 3412.0ms TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 12:12:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 12:12:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-05-06 12:12:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-06 12:12:09,352 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2021-05-06 12:12:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:09,352 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-06 12:12:09,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-06 12:12:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 12:12:09,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:09,353 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:09,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-06 12:12:09,353 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 164235638, now seen corresponding path program 43 times [2021-05-06 12:12:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:09,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361692361] [2021-05-06 12:12:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:09,355 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:09,356 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:09,356 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:10,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:10,250 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:10,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361692361] [2021-05-06 12:12:10,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [361692361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:10,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:10,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-06 12:12:10,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959641099] [2021-05-06 12:12:10,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 12:12:10,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:10,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 12:12:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 12:12:10,251 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:11,907 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 12:12:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 12:12:11,908 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 12:12:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:11,908 INFO L225 Difference]: With dead ends: 62 [2021-05-06 12:12:11,908 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 12:12:11,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2361.7ms TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 12:12:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 12:12:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 12:12:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-06 12:12:11,913 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2021-05-06 12:12:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:11,913 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-06 12:12:11,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-06 12:12:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 12:12:11,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:11,914 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:11,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-06 12:12:11,914 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:11,914 INFO L82 PathProgramCache]: Analyzing trace with hash 164284457, now seen corresponding path program 44 times [2021-05-06 12:12:11,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:11,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820955455] [2021-05-06 12:12:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:11,916 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:11,916 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:11,917 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:12,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:12,813 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:12,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820955455] [2021-05-06 12:12:12,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [820955455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:12,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:12,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-06 12:12:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278025702] [2021-05-06 12:12:12,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 12:12:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 12:12:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 12:12:12,814 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:15,567 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-06 12:12:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 12:12:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 12:12:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:15,568 INFO L225 Difference]: With dead ends: 65 [2021-05-06 12:12:15,568 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 12:12:15,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 3467.9ms TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 12:12:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 12:12:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-05-06 12:12:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-05-06 12:12:15,573 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2021-05-06 12:12:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:15,573 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-05-06 12:12:15,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-05-06 12:12:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 12:12:15,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:15,574 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:15,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-06 12:12:15,574 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 797853942, now seen corresponding path program 44 times [2021-05-06 12:12:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:15,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131175379] [2021-05-06 12:12:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:15,576 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:15,576 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:15,576 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:16,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:16,480 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:16,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131175379] [2021-05-06 12:12:16,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131175379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:16,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:16,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-06 12:12:16,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548089968] [2021-05-06 12:12:16,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 12:12:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:16,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 12:12:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 12:12:16,481 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:18,228 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-06 12:12:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 12:12:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-06 12:12:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:18,229 INFO L225 Difference]: With dead ends: 63 [2021-05-06 12:12:18,229 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 12:12:18,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2453.9ms TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 12:12:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 12:12:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 12:12:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 12:12:18,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2021-05-06 12:12:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:18,235 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 12:12:18,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 12:12:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 12:12:18,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:18,235 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:18,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-06 12:12:18,235 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash 797902761, now seen corresponding path program 45 times [2021-05-06 12:12:18,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:18,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828094870] [2021-05-06 12:12:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:18,237 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:18,238 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:18,238 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:19,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:19,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:19,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828094870] [2021-05-06 12:12:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828094870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:19,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-06 12:12:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174165452] [2021-05-06 12:12:19,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 12:12:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 12:12:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 12:12:19,321 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:22,302 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 12:12:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 12:12:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-06 12:12:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:22,302 INFO L225 Difference]: With dead ends: 66 [2021-05-06 12:12:22,303 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 12:12:22,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3843.1ms TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 12:12:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 12:12:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-06 12:12:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 12:12:22,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2021-05-06 12:12:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:22,308 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 12:12:22,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 12:12:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 12:12:22,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:22,309 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:22,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-06 12:12:22,309 INFO L428 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1034815114, now seen corresponding path program 45 times [2021-05-06 12:12:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:22,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543377780] [2021-05-06 12:12:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:22,311 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:22,311 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:22,312 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:23,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:23,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:23,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543377780] [2021-05-06 12:12:23,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543377780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:23,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:23,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-06 12:12:23,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483370314] [2021-05-06 12:12:23,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 12:12:23,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 12:12:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 12:12:23,328 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:25,170 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 12:12:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 12:12:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 12:12:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:25,171 INFO L225 Difference]: With dead ends: 64 [2021-05-06 12:12:25,171 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 12:12:25,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2601.1ms TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 12:12:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 12:12:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 12:12:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-06 12:12:25,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2021-05-06 12:12:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:25,177 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-06 12:12:25,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-06 12:12:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 12:12:25,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:25,177 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:25,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-06 12:12:25,177 INFO L428 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1034766295, now seen corresponding path program 46 times [2021-05-06 12:12:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:25,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023519710] [2021-05-06 12:12:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:25,182 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:25,182 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:25,183 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:26,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:26,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:26,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023519710] [2021-05-06 12:12:26,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023519710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:26,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:26,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-06 12:12:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34660250] [2021-05-06 12:12:26,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 12:12:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 12:12:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 12:12:26,149 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:29,161 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-06 12:12:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 12:12:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 12:12:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:29,163 INFO L225 Difference]: With dead ends: 67 [2021-05-06 12:12:29,163 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 12:12:29,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 3699.1ms TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 12:12:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 12:12:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-05-06 12:12:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-05-06 12:12:29,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2021-05-06 12:12:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:29,169 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-05-06 12:12:29,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-05-06 12:12:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 12:12:29,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:29,169 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:29,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-06 12:12:29,169 INFO L428 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2012981002, now seen corresponding path program 46 times [2021-05-06 12:12:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:29,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516925798] [2021-05-06 12:12:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:29,174 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:29,174 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:29,175 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:30,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:30,188 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:30,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516925798] [2021-05-06 12:12:30,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516925798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:30,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:30,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-06 12:12:30,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502581159] [2021-05-06 12:12:30,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 12:12:30,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:30,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 12:12:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 12:12:30,189 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:32,100 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-06 12:12:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 12:12:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-06 12:12:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:32,102 INFO L225 Difference]: With dead ends: 65 [2021-05-06 12:12:32,102 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 12:12:32,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2615.5ms TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 12:12:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 12:12:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 12:12:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 12:12:32,108 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2021-05-06 12:12:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:32,108 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 12:12:32,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 12:12:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 12:12:32,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:32,108 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:32,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-06 12:12:32,109 INFO L428 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2012932183, now seen corresponding path program 47 times [2021-05-06 12:12:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:32,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101642967] [2021-05-06 12:12:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:32,116 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:32,117 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:32,117 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:33,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:33,123 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101642967] [2021-05-06 12:12:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [101642967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:33,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:33,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-06 12:12:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412296641] [2021-05-06 12:12:33,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 12:12:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 12:12:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 12:12:33,124 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:36,215 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 12:12:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 12:12:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-06 12:12:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:36,216 INFO L225 Difference]: With dead ends: 68 [2021-05-06 12:12:36,216 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 12:12:36,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 3888.6ms TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 12:12:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 12:12:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-05-06 12:12:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-06 12:12:36,221 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2021-05-06 12:12:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:36,222 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-06 12:12:36,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-06 12:12:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 12:12:36,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:36,222 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:36,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-06 12:12:36,222 INFO L428 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2023614838, now seen corresponding path program 47 times [2021-05-06 12:12:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:36,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309268736] [2021-05-06 12:12:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:36,224 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:36,225 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:36,225 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:37,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:37,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:37,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309268736] [2021-05-06 12:12:37,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309268736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:37,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:37,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-06 12:12:37,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798466792] [2021-05-06 12:12:37,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 12:12:37,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 12:12:37,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 12:12:37,258 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:39,227 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 12:12:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 12:12:39,227 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 12:12:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:39,227 INFO L225 Difference]: With dead ends: 66 [2021-05-06 12:12:39,227 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 12:12:39,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2727.6ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 12:12:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 12:12:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-06 12:12:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-06 12:12:39,233 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2021-05-06 12:12:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:39,233 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-06 12:12:39,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-06 12:12:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 12:12:39,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:39,234 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:39,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-06 12:12:39,234 INFO L428 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2023663657, now seen corresponding path program 48 times [2021-05-06 12:12:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:39,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958521080] [2021-05-06 12:12:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:39,236 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:39,236 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:39,236 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:40,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:40,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:40,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958521080] [2021-05-06 12:12:40,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958521080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:40,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:40,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-06 12:12:40,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886022396] [2021-05-06 12:12:40,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 12:12:40,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:40,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 12:12:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 12:12:40,308 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:43,525 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-06 12:12:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 12:12:43,525 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 12:12:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:43,526 INFO L225 Difference]: With dead ends: 69 [2021-05-06 12:12:43,526 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 12:12:43,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 3952.7ms TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 12:12:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 12:12:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-05-06 12:12:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-05-06 12:12:43,532 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2021-05-06 12:12:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:43,532 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-05-06 12:12:43,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-05-06 12:12:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 12:12:43,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:43,532 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:43,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-06 12:12:43,532 INFO L428 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1690933002, now seen corresponding path program 48 times [2021-05-06 12:12:43,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:43,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14122558] [2021-05-06 12:12:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:43,537 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:43,537 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:43,538 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:44,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:44,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14122558] [2021-05-06 12:12:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [14122558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:44,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:44,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-06 12:12:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96896015] [2021-05-06 12:12:44,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 12:12:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:44,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 12:12:44,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 12:12:44,647 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:46,707 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-06 12:12:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 12:12:46,708 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-06 12:12:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:46,708 INFO L225 Difference]: With dead ends: 67 [2021-05-06 12:12:46,708 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 12:12:46,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2831.0ms TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 12:12:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 12:12:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 12:12:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 12:12:46,714 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2021-05-06 12:12:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:46,714 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 12:12:46,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 12:12:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 12:12:46,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:46,715 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:46,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-06 12:12:46,715 INFO L428 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1690884183, now seen corresponding path program 49 times [2021-05-06 12:12:46,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:46,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967642204] [2021-05-06 12:12:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:46,719 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:46,719 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:46,720 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:47,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:47,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:47,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967642204] [2021-05-06 12:12:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [967642204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:47,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:47,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-06 12:12:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166253920] [2021-05-06 12:12:47,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 12:12:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 12:12:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 12:12:47,853 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:51,258 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 12:12:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 12:12:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-06 12:12:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:51,259 INFO L225 Difference]: With dead ends: 70 [2021-05-06 12:12:51,259 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 12:12:51,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 4205.8ms TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 12:12:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 12:12:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-05-06 12:12:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-06 12:12:51,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2021-05-06 12:12:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:51,265 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-06 12:12:51,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-06 12:12:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 12:12:51,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:51,265 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:51,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-06 12:12:51,266 INFO L428 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash -877799050, now seen corresponding path program 49 times [2021-05-06 12:12:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:51,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952377811] [2021-05-06 12:12:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:51,278 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:51,279 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:51,279 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:52,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:52,400 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952377811] [2021-05-06 12:12:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952377811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:52,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:52,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-06 12:12:52,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954259660] [2021-05-06 12:12:52,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 12:12:52,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 12:12:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 12:12:52,401 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:54,566 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 12:12:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 12:12:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 12:12:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:54,567 INFO L225 Difference]: With dead ends: 68 [2021-05-06 12:12:54,567 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 12:12:54,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2986.2ms TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 12:12:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 12:12:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 12:12:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-06 12:12:54,573 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2021-05-06 12:12:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:54,573 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-06 12:12:54,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-06 12:12:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 12:12:54,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:54,574 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:54,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-06 12:12:54,574 INFO L428 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash -877750231, now seen corresponding path program 50 times [2021-05-06 12:12:54,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:54,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921595997] [2021-05-06 12:12:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:54,582 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:54,582 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:54,582 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:55,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:12:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:12:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:12:55,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:12:55,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921595997] [2021-05-06 12:12:55,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921595997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:12:55,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:12:55,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-06 12:12:55,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445924122] [2021-05-06 12:12:55,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 12:12:55,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:12:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 12:12:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 12:12:55,838 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:12:59,239 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-06 12:12:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 12:12:59,239 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 12:12:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:12:59,240 INFO L225 Difference]: With dead ends: 71 [2021-05-06 12:12:59,240 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 12:12:59,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4284.9ms TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 12:12:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 12:12:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-05-06 12:12:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-05-06 12:12:59,246 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2021-05-06 12:12:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:12:59,246 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-05-06 12:12:59,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:12:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-05-06 12:12:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 12:12:59,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:12:59,246 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:12:59,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-06 12:12:59,246 INFO L428 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:12:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:12:59,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1440450314, now seen corresponding path program 50 times [2021-05-06 12:12:59,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:12:59,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146036982] [2021-05-06 12:12:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:12:59,253 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:12:59,253 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:12:59,254 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:12:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:00,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:00,408 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:00,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146036982] [2021-05-06 12:13:00,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146036982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:00,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:00,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-06 12:13:00,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489315350] [2021-05-06 12:13:00,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 12:13:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:00,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 12:13:00,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 12:13:00,409 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:02,620 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-06 12:13:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 12:13:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-06 12:13:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:02,621 INFO L225 Difference]: With dead ends: 69 [2021-05-06 12:13:02,621 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 12:13:02,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3043.7ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 12:13:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 12:13:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 12:13:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 12:13:02,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2021-05-06 12:13:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:02,627 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 12:13:02,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 12:13:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 12:13:02,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:02,628 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:02,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-06 12:13:02,628 INFO L428 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1440401495, now seen corresponding path program 51 times [2021-05-06 12:13:02,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:02,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146602429] [2021-05-06 12:13:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:02,630 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:02,630 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:02,631 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:03,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:03,850 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:03,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146602429] [2021-05-06 12:13:03,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [146602429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:03,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:03,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-06 12:13:03,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859341148] [2021-05-06 12:13:03,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 12:13:03,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 12:13:03,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 12:13:03,851 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:07,392 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 12:13:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 12:13:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-06 12:13:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:07,393 INFO L225 Difference]: With dead ends: 72 [2021-05-06 12:13:07,393 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 12:13:07,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 4445.7ms TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 12:13:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 12:13:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-05-06 12:13:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-06 12:13:07,400 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2021-05-06 12:13:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:07,412 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-06 12:13:07,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-06 12:13:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 12:13:07,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:07,414 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:07,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-06 12:13:07,415 INFO L428 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:07,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1702770314, now seen corresponding path program 51 times [2021-05-06 12:13:07,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:07,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415747768] [2021-05-06 12:13:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:07,447 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:07,447 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:07,447 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:08,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:08,730 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:08,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415747768] [2021-05-06 12:13:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415747768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:08,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:08,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-06 12:13:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822045680] [2021-05-06 12:13:08,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 12:13:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 12:13:08,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 12:13:08,731 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:11,017 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 12:13:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 12:13:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 12:13:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:11,018 INFO L225 Difference]: With dead ends: 70 [2021-05-06 12:13:11,018 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 12:13:11,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 3187.6ms TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 12:13:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 12:13:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-06 12:13:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-06 12:13:11,024 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2021-05-06 12:13:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:11,024 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-06 12:13:11,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-06 12:13:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 12:13:11,025 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:11,025 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:11,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-06 12:13:11,025 INFO L428 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1702721495, now seen corresponding path program 52 times [2021-05-06 12:13:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:11,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112561533] [2021-05-06 12:13:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:11,029 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:11,030 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:11,030 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:12,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:12,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112561533] [2021-05-06 12:13:12,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112561533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:12,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:12,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-06 12:13:12,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362774372] [2021-05-06 12:13:12,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 12:13:12,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 12:13:12,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 12:13:12,246 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:15,755 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-06 12:13:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 12:13:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 12:13:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:15,756 INFO L225 Difference]: With dead ends: 73 [2021-05-06 12:13:15,756 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 12:13:15,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4457.5ms TimeCoverageRelationStatistics Valid=4403, Invalid=7369, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 12:13:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 12:13:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-05-06 12:13:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-05-06 12:13:15,762 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2021-05-06 12:13:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:15,762 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-05-06 12:13:15,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-05-06 12:13:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 12:13:15,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:15,762 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:15,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-06 12:13:15,763 INFO L428 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:15,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1244755722, now seen corresponding path program 52 times [2021-05-06 12:13:15,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:15,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369465035] [2021-05-06 12:13:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:15,765 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:15,765 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:15,765 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:16,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:16,964 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:16,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369465035] [2021-05-06 12:13:16,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [369465035] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:16,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:16,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-06 12:13:16,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820602408] [2021-05-06 12:13:16,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 12:13:16,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 12:13:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 12:13:16,965 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:19,285 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-06 12:13:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 12:13:19,285 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-06 12:13:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:19,285 INFO L225 Difference]: With dead ends: 71 [2021-05-06 12:13:19,285 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 12:13:19,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 3190.3ms TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 12:13:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 12:13:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 12:13:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 63 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 12:13:19,291 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2021-05-06 12:13:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:19,291 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 12:13:19,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 12:13:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 12:13:19,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:19,292 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:19,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-06 12:13:19,292 INFO L428 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1244706903, now seen corresponding path program 53 times [2021-05-06 12:13:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:19,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776453571] [2021-05-06 12:13:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:19,298 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:19,298 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:19,299 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:20,562 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:20,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776453571] [2021-05-06 12:13:20,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [776453571] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:20,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:20,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-06 12:13:20,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117336787] [2021-05-06 12:13:20,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 12:13:20,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:20,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 12:13:20,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 12:13:20,563 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:24,193 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 12:13:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 12:13:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-06 12:13:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:24,194 INFO L225 Difference]: With dead ends: 74 [2021-05-06 12:13:24,194 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 12:13:24,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 4649.3ms TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 12:13:24,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 12:13:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-05-06 12:13:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 12:13:24,200 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2021-05-06 12:13:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:24,201 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 12:13:24,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 12:13:24,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 12:13:24,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:24,201 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:24,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-06 12:13:24,201 INFO L428 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 68794742, now seen corresponding path program 53 times [2021-05-06 12:13:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:24,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842291167] [2021-05-06 12:13:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:24,203 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:24,203 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:24,204 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:25,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:25,492 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:25,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842291167] [2021-05-06 12:13:25,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842291167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:25,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:25,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-06 12:13:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521510909] [2021-05-06 12:13:25,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 12:13:25,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:25,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 12:13:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 12:13:25,493 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:27,885 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 12:13:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 12:13:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 12:13:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:27,886 INFO L225 Difference]: With dead ends: 72 [2021-05-06 12:13:27,886 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 12:13:27,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3342.2ms TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 12:13:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 12:13:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 12:13:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-06 12:13:27,893 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2021-05-06 12:13:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:27,893 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-06 12:13:27,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-06 12:13:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 12:13:27,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:27,893 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:27,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-06 12:13:27,893 INFO L428 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 68843561, now seen corresponding path program 54 times [2021-05-06 12:13:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:27,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971971648] [2021-05-06 12:13:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:27,895 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:27,896 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:27,896 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:29,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:29,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:29,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971971648] [2021-05-06 12:13:29,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971971648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:29,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:29,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-06 12:13:29,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925917848] [2021-05-06 12:13:29,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 12:13:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 12:13:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 12:13:29,204 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:32,929 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-06 12:13:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 12:13:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 12:13:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:32,930 INFO L225 Difference]: With dead ends: 75 [2021-05-06 12:13:32,930 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 12:13:32,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 4741.2ms TimeCoverageRelationStatistics Valid=4734, Invalid=7922, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 12:13:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 12:13:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-05-06 12:13:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-05-06 12:13:32,936 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2021-05-06 12:13:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:32,936 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-05-06 12:13:32,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-05-06 12:13:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 12:13:32,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:32,937 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:32,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-06 12:13:32,937 INFO L428 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2134153462, now seen corresponding path program 54 times [2021-05-06 12:13:32,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:32,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449560703] [2021-05-06 12:13:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:32,940 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:32,940 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:32,941 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:34,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:34,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:34,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449560703] [2021-05-06 12:13:34,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449560703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:34,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:34,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-06 12:13:34,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276001783] [2021-05-06 12:13:34,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 12:13:34,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 12:13:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 12:13:34,274 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:36,786 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-06 12:13:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 12:13:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-06 12:13:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:36,787 INFO L225 Difference]: With dead ends: 73 [2021-05-06 12:13:36,787 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 12:13:36,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 3474.5ms TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 12:13:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 12:13:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 12:13:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 12:13:36,793 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2021-05-06 12:13:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:36,793 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 12:13:36,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 12:13:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 12:13:36,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:36,794 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:36,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-06 12:13:36,794 INFO L428 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2134202281, now seen corresponding path program 55 times [2021-05-06 12:13:36,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:36,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042487637] [2021-05-06 12:13:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:36,796 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:36,796 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:36,797 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:38,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:38,173 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:38,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042487637] [2021-05-06 12:13:38,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042487637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:38,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:38,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-06 12:13:38,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852745112] [2021-05-06 12:13:38,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 12:13:38,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 12:13:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 12:13:38,174 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:42,086 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 12:13:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 12:13:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-06 12:13:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:42,086 INFO L225 Difference]: With dead ends: 76 [2021-05-06 12:13:42,086 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 12:13:42,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 4928.7ms TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 12:13:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 12:13:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-05-06 12:13:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-06 12:13:42,093 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2021-05-06 12:13:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:42,093 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-06 12:13:42,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-06 12:13:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 12:13:42,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:42,093 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:42,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-06 12:13:42,093 INFO L428 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1735764342, now seen corresponding path program 55 times [2021-05-06 12:13:42,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:42,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256445247] [2021-05-06 12:13:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:42,095 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:42,095 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:42,096 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:43,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:43,470 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:43,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256445247] [2021-05-06 12:13:43,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [256445247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:43,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:43,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-06 12:13:43,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384712770] [2021-05-06 12:13:43,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 12:13:43,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 12:13:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 12:13:43,471 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:46,046 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 12:13:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 12:13:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 12:13:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:46,047 INFO L225 Difference]: With dead ends: 74 [2021-05-06 12:13:46,047 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 12:13:46,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3592.2ms TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 12:13:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 12:13:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 12:13:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-06 12:13:46,056 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2021-05-06 12:13:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:46,057 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-06 12:13:46,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-06 12:13:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 12:13:46,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:46,057 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:46,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-06 12:13:46,057 INFO L428 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1735813161, now seen corresponding path program 56 times [2021-05-06 12:13:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:46,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907958450] [2021-05-06 12:13:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:46,059 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:46,059 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:46,060 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:47,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:47,469 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907958450] [2021-05-06 12:13:47,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [907958450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:47,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:47,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-06 12:13:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171811339] [2021-05-06 12:13:47,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 12:13:47,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 12:13:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 12:13:47,471 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:48,595 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-06 12:13:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:51,709 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-06 12:13:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 12:13:51,709 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 12:13:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:51,710 INFO L225 Difference]: With dead ends: 77 [2021-05-06 12:13:51,710 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 12:13:51,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 5247.0ms TimeCoverageRelationStatistics Valid=5077, Invalid=8495, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 12:13:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 12:13:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-05-06 12:13:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-05-06 12:13:51,719 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2021-05-06 12:13:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:51,719 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-05-06 12:13:51,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-05-06 12:13:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 12:13:51,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:51,719 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:51,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-06 12:13:51,719 INFO L428 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2024363786, now seen corresponding path program 56 times [2021-05-06 12:13:51,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:51,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025436520] [2021-05-06 12:13:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:51,724 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:51,724 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:51,725 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:53,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:53,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025436520] [2021-05-06 12:13:53,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025436520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:53,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:53,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-06 12:13:53,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816939295] [2021-05-06 12:13:53,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 12:13:53,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 12:13:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 12:13:53,303 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:13:55,871 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-06 12:13:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 12:13:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-06 12:13:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:13:55,872 INFO L225 Difference]: With dead ends: 75 [2021-05-06 12:13:55,872 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 12:13:55,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3801.2ms TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 12:13:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 12:13:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 12:13:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 12:13:55,878 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2021-05-06 12:13:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:13:55,878 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 12:13:55,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:13:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 12:13:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 12:13:55,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:13:55,879 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:13:55,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-06 12:13:55,879 INFO L428 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:13:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:13:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2024314967, now seen corresponding path program 57 times [2021-05-06 12:13:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:13:55,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653122105] [2021-05-06 12:13:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:13:55,881 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:13:55,881 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:13:55,881 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:13:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:57,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:13:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:13:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:13:57,296 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:13:57,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653122105] [2021-05-06 12:13:57,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [653122105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:13:57,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:13:57,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-06 12:13:57,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090828536] [2021-05-06 12:13:57,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 12:13:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:13:57,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 12:13:57,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 12:13:57,297 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:01,626 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 12:14:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 12:14:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-06 12:14:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:01,627 INFO L225 Difference]: With dead ends: 78 [2021-05-06 12:14:01,627 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 12:14:01,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 5356.7ms TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 12:14:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 12:14:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-05-06 12:14:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-05-06 12:14:01,634 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 67 [2021-05-06 12:14:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:01,634 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-05-06 12:14:01,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-05-06 12:14:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 12:14:01,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:01,634 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:01,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-06 12:14:01,634 INFO L428 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1670748534, now seen corresponding path program 57 times [2021-05-06 12:14:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:01,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11438900] [2021-05-06 12:14:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:01,636 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:01,636 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:01,637 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:03,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:03,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11438900] [2021-05-06 12:14:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [11438900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:03,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:03,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-06 12:14:03,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553724212] [2021-05-06 12:14:03,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 12:14:03,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:03,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 12:14:03,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 12:14:03,070 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:05,803 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 12:14:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 12:14:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 12:14:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:05,811 INFO L225 Difference]: With dead ends: 76 [2021-05-06 12:14:05,811 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 12:14:05,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 3790.4ms TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 12:14:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 12:14:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-06 12:14:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-06 12:14:05,818 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2021-05-06 12:14:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:05,818 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-06 12:14:05,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-06 12:14:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 12:14:05,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:05,819 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:05,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-06 12:14:05,819 INFO L428 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1670797353, now seen corresponding path program 58 times [2021-05-06 12:14:05,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:05,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379969821] [2021-05-06 12:14:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:05,821 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:05,821 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:05,822 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:07,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:07,342 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:07,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379969821] [2021-05-06 12:14:07,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379969821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:07,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:07,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-06 12:14:07,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719554717] [2021-05-06 12:14:07,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 12:14:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 12:14:07,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 12:14:07,343 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:11,649 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-06 12:14:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 12:14:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 12:14:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:11,650 INFO L225 Difference]: With dead ends: 79 [2021-05-06 12:14:11,650 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 12:14:11,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 5428.5ms TimeCoverageRelationStatistics Valid=5432, Invalid=9088, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 12:14:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 12:14:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-06 12:14:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-05-06 12:14:11,657 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2021-05-06 12:14:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:11,657 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-05-06 12:14:11,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-05-06 12:14:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 12:14:11,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:11,657 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:11,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-06 12:14:11,657 INFO L428 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:11,658 INFO L82 PathProgramCache]: Analyzing trace with hash 255113462, now seen corresponding path program 58 times [2021-05-06 12:14:11,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:11,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041336207] [2021-05-06 12:14:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:11,659 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:11,659 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:11,660 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:13,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:13,128 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:13,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041336207] [2021-05-06 12:14:13,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041336207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:13,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:13,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-06 12:14:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089937968] [2021-05-06 12:14:13,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 12:14:13,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:13,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 12:14:13,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 12:14:13,129 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:15,827 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-06 12:14:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 12:14:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-06 12:14:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:15,828 INFO L225 Difference]: With dead ends: 77 [2021-05-06 12:14:15,828 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 12:14:15,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 3841.3ms TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 12:14:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 12:14:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 12:14:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 12:14:15,846 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2021-05-06 12:14:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:15,846 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 12:14:15,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 12:14:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 12:14:15,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:15,848 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:15,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-06 12:14:15,848 INFO L428 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash 255162281, now seen corresponding path program 59 times [2021-05-06 12:14:15,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:15,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521866639] [2021-05-06 12:14:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:15,850 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:15,850 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:15,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:17,379 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521866639] [2021-05-06 12:14:17,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [521866639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:17,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:17,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-06 12:14:17,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916991530] [2021-05-06 12:14:17,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 12:14:17,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 12:14:17,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 12:14:17,380 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:21,656 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 12:14:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 12:14:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-06 12:14:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:21,662 INFO L225 Difference]: With dead ends: 80 [2021-05-06 12:14:21,662 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 12:14:21,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 5544.8ms TimeCoverageRelationStatistics Valid=5614, Invalid=9392, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 12:14:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 12:14:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-05-06 12:14:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-06 12:14:21,670 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2021-05-06 12:14:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:21,670 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-06 12:14:21,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-06 12:14:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 12:14:21,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:21,670 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:21,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-06 12:14:21,671 INFO L428 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:21,671 INFO L82 PathProgramCache]: Analyzing trace with hash -679900810, now seen corresponding path program 59 times [2021-05-06 12:14:21,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:21,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465225553] [2021-05-06 12:14:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:21,674 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:21,674 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:21,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:23,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:23,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465225553] [2021-05-06 12:14:23,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465225553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:23,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:23,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-06 12:14:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553933447] [2021-05-06 12:14:23,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 12:14:23,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:23,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 12:14:23,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 12:14:23,246 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:26,091 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 12:14:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 12:14:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 12:14:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:26,092 INFO L225 Difference]: With dead ends: 78 [2021-05-06 12:14:26,092 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 12:14:26,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 4025.2ms TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 12:14:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 12:14:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 12:14:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-06 12:14:26,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2021-05-06 12:14:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:26,099 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-06 12:14:26,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-06 12:14:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 12:14:26,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:26,100 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:26,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-06 12:14:26,100 INFO L428 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:26,100 INFO L82 PathProgramCache]: Analyzing trace with hash -679851991, now seen corresponding path program 60 times [2021-05-06 12:14:26,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:26,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113316572] [2021-05-06 12:14:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:26,102 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:26,102 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:26,102 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:27,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:27,685 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:27,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113316572] [2021-05-06 12:14:27,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113316572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:27,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:27,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-06 12:14:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833450864] [2021-05-06 12:14:27,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 12:14:27,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 12:14:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 12:14:27,686 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:32,193 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-06 12:14:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 12:14:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 12:14:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:32,194 INFO L225 Difference]: With dead ends: 81 [2021-05-06 12:14:32,194 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 12:14:32,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 5669.3ms TimeCoverageRelationStatistics Valid=5799, Invalid=9701, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 12:14:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 12:14:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-05-06 12:14:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-05-06 12:14:32,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2021-05-06 12:14:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:32,201 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-05-06 12:14:32,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-05-06 12:14:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 12:14:32,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:32,202 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:32,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-06 12:14:32,202 INFO L428 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 399427830, now seen corresponding path program 60 times [2021-05-06 12:14:32,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:32,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486178930] [2021-05-06 12:14:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:32,204 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:32,204 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:32,204 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:33,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:33,800 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486178930] [2021-05-06 12:14:33,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486178930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:33,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:33,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-06 12:14:33,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576544546] [2021-05-06 12:14:33,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 12:14:33,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 12:14:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 12:14:33,801 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:36,692 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-06 12:14:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 12:14:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-06 12:14:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:36,693 INFO L225 Difference]: With dead ends: 79 [2021-05-06 12:14:36,693 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 12:14:36,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 4091.7ms TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 12:14:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 12:14:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 12:14:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 71 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 12:14:36,700 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2021-05-06 12:14:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:36,700 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 12:14:36,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 12:14:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 12:14:36,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:36,700 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:36,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-06 12:14:36,701 INFO L428 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 399476649, now seen corresponding path program 61 times [2021-05-06 12:14:36,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:36,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120670484] [2021-05-06 12:14:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:36,703 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:36,703 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:36,703 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:38,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:38,327 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:38,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120670484] [2021-05-06 12:14:38,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2120670484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:38,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:38,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-06 12:14:38,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165703306] [2021-05-06 12:14:38,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 12:14:38,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 12:14:38,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 12:14:38,328 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:42,881 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 12:14:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 12:14:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-06 12:14:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:42,882 INFO L225 Difference]: With dead ends: 82 [2021-05-06 12:14:42,882 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 12:14:42,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 5770.8ms TimeCoverageRelationStatistics Valid=5987, Invalid=10015, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 12:14:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 12:14:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-05-06 12:14:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 12:14:42,888 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2021-05-06 12:14:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:42,889 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 12:14:42,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 12:14:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 12:14:42,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:42,889 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:42,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-06 12:14:42,889 INFO L428 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash -501122698, now seen corresponding path program 61 times [2021-05-06 12:14:42,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:42,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100186837] [2021-05-06 12:14:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:42,894 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:42,894 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:42,894 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:44,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:44,519 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:44,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100186837] [2021-05-06 12:14:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100186837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:44,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-06 12:14:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296120155] [2021-05-06 12:14:44,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 12:14:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 12:14:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 12:14:44,520 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:47,481 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 12:14:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 12:14:47,482 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 12:14:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:47,482 INFO L225 Difference]: With dead ends: 80 [2021-05-06 12:14:47,482 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 12:14:47,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4194.3ms TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 12:14:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 12:14:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 12:14:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-06 12:14:47,489 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2021-05-06 12:14:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:47,489 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-06 12:14:47,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-06 12:14:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 12:14:47,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:47,489 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:47,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-06 12:14:47,490 INFO L428 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:47,490 INFO L82 PathProgramCache]: Analyzing trace with hash -501073879, now seen corresponding path program 62 times [2021-05-06 12:14:47,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:47,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792623618] [2021-05-06 12:14:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:47,492 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:47,492 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:47,492 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:49,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:49,143 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:49,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792623618] [2021-05-06 12:14:49,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [792623618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:49,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:49,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-06 12:14:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117606107] [2021-05-06 12:14:49,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 12:14:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 12:14:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 12:14:49,144 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:53,857 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-06 12:14:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 12:14:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 12:14:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:53,858 INFO L225 Difference]: With dead ends: 83 [2021-05-06 12:14:53,858 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 12:14:53,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 5930.4ms TimeCoverageRelationStatistics Valid=6178, Invalid=10334, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 12:14:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 12:14:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-05-06 12:14:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-05-06 12:14:53,865 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2021-05-06 12:14:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:53,865 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-05-06 12:14:53,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-05-06 12:14:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 12:14:53,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:53,865 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:53,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-06 12:14:53,865 INFO L428 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1646582006, now seen corresponding path program 62 times [2021-05-06 12:14:53,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:53,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87181565] [2021-05-06 12:14:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:53,867 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:53,867 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:53,868 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:55,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:14:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:14:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:14:55,535 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:14:55,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87181565] [2021-05-06 12:14:55,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [87181565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:14:55,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:14:55,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-06 12:14:55,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020064317] [2021-05-06 12:14:55,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 12:14:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:14:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 12:14:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 12:14:55,536 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:14:58,596 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-06 12:14:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 12:14:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 12:14:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:14:58,597 INFO L225 Difference]: With dead ends: 81 [2021-05-06 12:14:58,597 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 12:14:58,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 4326.3ms TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 12:14:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 12:14:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 12:14:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 12:14:58,607 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2021-05-06 12:14:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:14:58,607 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 12:14:58,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:14:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 12:14:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 12:14:58,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:14:58,608 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:14:58,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-06 12:14:58,608 INFO L428 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:14:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:14:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1646630825, now seen corresponding path program 63 times [2021-05-06 12:14:58,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:14:58,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656114652] [2021-05-06 12:14:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:14:58,610 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:14:58,610 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:14:58,610 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:14:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:00,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:00,319 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:00,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656114652] [2021-05-06 12:15:00,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656114652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:00,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:00,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-06 12:15:00,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731082521] [2021-05-06 12:15:00,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 12:15:00,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:00,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 12:15:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 12:15:00,321 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:01,159 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-06 12:15:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:05,576 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 12:15:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 12:15:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 12:15:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:05,577 INFO L225 Difference]: With dead ends: 84 [2021-05-06 12:15:05,577 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 12:15:05,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 6474.2ms TimeCoverageRelationStatistics Valid=6372, Invalid=10658, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 12:15:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 12:15:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 12:15:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-06 12:15:05,585 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2021-05-06 12:15:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:05,585 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-06 12:15:05,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-06 12:15:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 12:15:05,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:05,607 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:05,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-06 12:15:05,607 INFO L428 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash -494048906, now seen corresponding path program 63 times [2021-05-06 12:15:05,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:05,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947158073] [2021-05-06 12:15:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:05,610 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:05,610 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:05,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:07,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:07,664 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:07,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947158073] [2021-05-06 12:15:07,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [947158073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:07,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:07,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-06 12:15:07,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012095061] [2021-05-06 12:15:07,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 12:15:07,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:07,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 12:15:07,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 12:15:07,665 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:11,226 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 12:15:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 12:15:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 12:15:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:11,226 INFO L225 Difference]: With dead ends: 82 [2021-05-06 12:15:11,226 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 12:15:11,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 5170.5ms TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 12:15:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 12:15:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 12:15:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-06 12:15:11,234 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2021-05-06 12:15:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:11,234 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-06 12:15:11,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-06 12:15:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 12:15:11,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:11,234 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:11,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-06 12:15:11,234 INFO L428 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:11,235 INFO L82 PathProgramCache]: Analyzing trace with hash -494000087, now seen corresponding path program 64 times [2021-05-06 12:15:11,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:11,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662335511] [2021-05-06 12:15:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:11,243 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:11,243 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:11,245 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:13,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:13,328 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:13,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662335511] [2021-05-06 12:15:13,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662335511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:13,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:13,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-06 12:15:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765963646] [2021-05-06 12:15:13,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 12:15:13,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 12:15:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 12:15:13,330 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:18,781 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-06 12:15:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 12:15:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 12:15:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:18,782 INFO L225 Difference]: With dead ends: 85 [2021-05-06 12:15:18,782 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 12:15:18,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 7043.1ms TimeCoverageRelationStatistics Valid=6569, Invalid=10987, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 12:15:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 12:15:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-05-06 12:15:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-05-06 12:15:18,804 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2021-05-06 12:15:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:18,805 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-05-06 12:15:18,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-05-06 12:15:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 12:15:18,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:18,805 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:18,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-06 12:15:18,805 INFO L428 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1865869558, now seen corresponding path program 64 times [2021-05-06 12:15:18,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:18,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371007141] [2021-05-06 12:15:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:18,808 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:18,809 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:18,809 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:20,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:20,798 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:20,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371007141] [2021-05-06 12:15:20,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [371007141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:20,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:20,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-06 12:15:20,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654094118] [2021-05-06 12:15:20,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 12:15:20,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:20,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 12:15:20,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 12:15:20,800 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:24,135 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-06 12:15:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 12:15:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-06 12:15:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:24,136 INFO L225 Difference]: With dead ends: 83 [2021-05-06 12:15:24,136 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 12:15:24,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 4878.3ms TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 12:15:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 12:15:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 12:15:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 12:15:24,143 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2021-05-06 12:15:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:24,143 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 12:15:24,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 12:15:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 12:15:24,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:24,144 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:24,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-06 12:15:24,144 INFO L428 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1865918377, now seen corresponding path program 65 times [2021-05-06 12:15:24,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:24,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389021227] [2021-05-06 12:15:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:24,146 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:24,146 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:24,146 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:26,153 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:26,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389021227] [2021-05-06 12:15:26,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389021227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:26,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:26,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-06 12:15:26,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306113373] [2021-05-06 12:15:26,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 12:15:26,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:26,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 12:15:26,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 12:15:26,154 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:31,553 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 12:15:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 12:15:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-06 12:15:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:31,553 INFO L225 Difference]: With dead ends: 86 [2021-05-06 12:15:31,553 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 12:15:31,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 6918.7ms TimeCoverageRelationStatistics Valid=6769, Invalid=11321, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 12:15:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 12:15:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-05-06 12:15:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-06 12:15:31,561 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2021-05-06 12:15:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:31,561 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-06 12:15:31,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-06 12:15:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 12:15:31,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:31,561 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:31,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-06 12:15:31,561 INFO L428 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2008897910, now seen corresponding path program 65 times [2021-05-06 12:15:31,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:31,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747866845] [2021-05-06 12:15:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:31,566 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:31,566 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:31,567 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:33,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:33,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:33,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747866845] [2021-05-06 12:15:33,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747866845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:33,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:33,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-06 12:15:33,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458180176] [2021-05-06 12:15:33,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 12:15:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 12:15:33,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 12:15:33,542 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:37,025 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 12:15:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 12:15:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 12:15:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:37,026 INFO L225 Difference]: With dead ends: 84 [2021-05-06 12:15:37,026 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 12:15:37,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 5123.3ms TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 12:15:37,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 12:15:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 12:15:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-06 12:15:37,033 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2021-05-06 12:15:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:37,033 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-06 12:15:37,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-06 12:15:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 12:15:37,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:37,034 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:37,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-06 12:15:37,034 INFO L428 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2008946729, now seen corresponding path program 66 times [2021-05-06 12:15:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:37,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427755503] [2021-05-06 12:15:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:37,036 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:37,036 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:37,036 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:39,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:39,201 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427755503] [2021-05-06 12:15:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427755503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-06 12:15:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646682369] [2021-05-06 12:15:39,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 12:15:39,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 12:15:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 12:15:39,202 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:44,496 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-06 12:15:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 12:15:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 12:15:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:44,497 INFO L225 Difference]: With dead ends: 87 [2021-05-06 12:15:44,497 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 12:15:44,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 7053.7ms TimeCoverageRelationStatistics Valid=6972, Invalid=11660, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 12:15:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 12:15:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-05-06 12:15:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-05-06 12:15:44,504 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2021-05-06 12:15:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:44,504 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-05-06 12:15:44,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-05-06 12:15:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 12:15:44,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:44,505 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:44,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-06 12:15:44,505 INFO L428 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2147157770, now seen corresponding path program 66 times [2021-05-06 12:15:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:44,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389174024] [2021-05-06 12:15:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:44,507 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:44,507 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:44,507 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:46,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:46,434 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:46,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389174024] [2021-05-06 12:15:46,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389174024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:46,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:46,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-06 12:15:46,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223500631] [2021-05-06 12:15:46,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 12:15:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 12:15:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 12:15:46,435 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:50,045 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-06 12:15:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 12:15:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-06 12:15:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:50,046 INFO L225 Difference]: With dead ends: 85 [2021-05-06 12:15:50,046 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 12:15:50,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 5068.0ms TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 12:15:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 12:15:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 12:15:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 12:15:50,053 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2021-05-06 12:15:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:50,053 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 12:15:50,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 12:15:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 12:15:50,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:50,054 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:50,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-06 12:15:50,054 INFO L428 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:50,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2147108951, now seen corresponding path program 67 times [2021-05-06 12:15:50,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:50,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123028260] [2021-05-06 12:15:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:50,056 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:50,056 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:50,056 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:52,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:52,154 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:52,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123028260] [2021-05-06 12:15:52,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [123028260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:52,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:52,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-06 12:15:52,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304048556] [2021-05-06 12:15:52,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 12:15:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 12:15:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 12:15:52,155 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:52,368 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-06 12:15:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:15:57,794 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 12:15:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 12:15:57,795 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-06 12:15:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:15:57,795 INFO L225 Difference]: With dead ends: 88 [2021-05-06 12:15:57,795 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 12:15:57,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 7241.9ms TimeCoverageRelationStatistics Valid=7178, Invalid=12004, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 12:15:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 12:15:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-05-06 12:15:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-06 12:15:57,803 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2021-05-06 12:15:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:15:57,803 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-06 12:15:57,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:15:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-06 12:15:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 12:15:57,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:15:57,803 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:15:57,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-06 12:15:57,803 INFO L428 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:15:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:15:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2135864970, now seen corresponding path program 67 times [2021-05-06 12:15:57,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:15:57,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216281927] [2021-05-06 12:15:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:15:57,806 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:15:57,806 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:15:57,806 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:15:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:15:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:15:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:15:59,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:15:59,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216281927] [2021-05-06 12:15:59,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [216281927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:15:59,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:15:59,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-06 12:15:59,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256442210] [2021-05-06 12:15:59,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 12:15:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:15:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 12:15:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 12:15:59,844 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:03,249 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 12:16:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 12:16:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 12:16:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:03,249 INFO L225 Difference]: With dead ends: 86 [2021-05-06 12:16:03,249 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 12:16:03,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 5133.0ms TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 12:16:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 12:16:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 12:16:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-06 12:16:03,257 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 78 [2021-05-06 12:16:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:03,257 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-06 12:16:03,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-06 12:16:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 12:16:03,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:03,257 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:03,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-06 12:16:03,257 INFO L428 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2135816151, now seen corresponding path program 68 times [2021-05-06 12:16:03,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:03,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011489055] [2021-05-06 12:16:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:03,259 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:03,260 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:03,260 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:05,407 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011489055] [2021-05-06 12:16:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011489055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:05,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:05,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-06 12:16:05,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691064981] [2021-05-06 12:16:05,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 12:16:05,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 12:16:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 12:16:05,409 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:11,031 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-05-06 12:16:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 12:16:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 12:16:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:11,032 INFO L225 Difference]: With dead ends: 89 [2021-05-06 12:16:11,032 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 12:16:11,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 7342.6ms TimeCoverageRelationStatistics Valid=7387, Invalid=12353, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 12:16:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 12:16:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-05-06 12:16:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-05-06 12:16:11,039 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2021-05-06 12:16:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:11,039 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-05-06 12:16:11,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-05-06 12:16:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 12:16:11,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:11,040 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:11,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-06 12:16:11,040 INFO L428 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:11,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1785788170, now seen corresponding path program 68 times [2021-05-06 12:16:11,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:11,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297748370] [2021-05-06 12:16:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:11,042 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:11,042 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:11,043 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:13,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:13,022 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:13,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297748370] [2021-05-06 12:16:13,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297748370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:13,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:13,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-06 12:16:13,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373076976] [2021-05-06 12:16:13,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 12:16:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 12:16:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 12:16:13,023 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:16,589 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-06 12:16:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 12:16:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 12:16:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:16,590 INFO L225 Difference]: With dead ends: 87 [2021-05-06 12:16:16,590 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 12:16:16,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 5098.1ms TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 12:16:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 12:16:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 12:16:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 12:16:16,598 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2021-05-06 12:16:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:16,598 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 12:16:16,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 12:16:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 12:16:16,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:16,598 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:16,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-06 12:16:16,598 INFO L428 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1785739351, now seen corresponding path program 69 times [2021-05-06 12:16:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:16,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066727685] [2021-05-06 12:16:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:16,603 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:16,603 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:16,603 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:18,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:18,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066727685] [2021-05-06 12:16:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066727685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:18,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:18,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-06 12:16:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820055539] [2021-05-06 12:16:18,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 12:16:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 12:16:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 12:16:18,774 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:24,156 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 12:16:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 12:16:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 12:16:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:24,156 INFO L225 Difference]: With dead ends: 90 [2021-05-06 12:16:24,156 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 12:16:24,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2551 ImplicationChecksByTransitivity, 7218.2ms TimeCoverageRelationStatistics Valid=7599, Invalid=12707, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 12:16:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 12:16:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-05-06 12:16:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 12:16:24,164 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2021-05-06 12:16:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:24,164 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 12:16:24,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 12:16:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 12:16:24,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:24,164 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:24,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-06 12:16:24,164 INFO L428 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 476658038, now seen corresponding path program 69 times [2021-05-06 12:16:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:24,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056706427] [2021-05-06 12:16:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:24,167 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:24,167 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:24,167 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:26,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:26,496 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:26,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056706427] [2021-05-06 12:16:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056706427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:26,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:26,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-06 12:16:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61566314] [2021-05-06 12:16:26,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 12:16:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 12:16:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 12:16:26,497 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:30,097 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 12:16:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 12:16:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 12:16:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:30,098 INFO L225 Difference]: With dead ends: 88 [2021-05-06 12:16:30,098 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 12:16:30,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 5474.6ms TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 12:16:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 12:16:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 12:16:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-06 12:16:30,105 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 80 [2021-05-06 12:16:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:30,105 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-06 12:16:30,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-06 12:16:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 12:16:30,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:30,106 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:30,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-06 12:16:30,106 INFO L428 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash 476706857, now seen corresponding path program 70 times [2021-05-06 12:16:30,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:30,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065793546] [2021-05-06 12:16:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:30,113 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:30,114 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:30,114 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:32,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:32,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:32,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065793546] [2021-05-06 12:16:32,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065793546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:32,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:32,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-06 12:16:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129536534] [2021-05-06 12:16:32,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 12:16:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 12:16:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 12:16:32,188 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:37,928 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-05-06 12:16:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 12:16:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 12:16:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:37,929 INFO L225 Difference]: With dead ends: 91 [2021-05-06 12:16:37,929 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 12:16:37,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2623 ImplicationChecksByTransitivity, 7299.6ms TimeCoverageRelationStatistics Valid=7814, Invalid=13066, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 12:16:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 12:16:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-05-06 12:16:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-05-06 12:16:37,937 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2021-05-06 12:16:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:37,937 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-05-06 12:16:37,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-05-06 12:16:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 12:16:37,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:37,952 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:37,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-06 12:16:37,953 INFO L428 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:37,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1893013750, now seen corresponding path program 70 times [2021-05-06 12:16:37,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:37,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392804675] [2021-05-06 12:16:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:37,955 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:37,955 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:37,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:40,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:40,054 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392804675] [2021-05-06 12:16:40,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [392804675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:40,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:40,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-06 12:16:40,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852405663] [2021-05-06 12:16:40,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 12:16:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 12:16:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 12:16:40,055 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:43,753 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-05-06 12:16:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 12:16:43,754 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-06 12:16:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:43,754 INFO L225 Difference]: With dead ends: 89 [2021-05-06 12:16:43,754 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 12:16:43,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 5376.7ms TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 12:16:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 12:16:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 12:16:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 12:16:43,762 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 81 [2021-05-06 12:16:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:43,762 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 12:16:43,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 12:16:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 12:16:43,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:43,763 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:43,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-06 12:16:43,763 INFO L428 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:43,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1893062569, now seen corresponding path program 71 times [2021-05-06 12:16:43,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:43,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463876748] [2021-05-06 12:16:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:43,765 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:43,765 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:43,765 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:45,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:45,910 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463876748] [2021-05-06 12:16:45,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [463876748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:45,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:45,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-06 12:16:45,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879683528] [2021-05-06 12:16:45,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 12:16:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 12:16:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 12:16:45,912 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:51,830 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 12:16:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 12:16:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-06 12:16:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:51,837 INFO L225 Difference]: With dead ends: 92 [2021-05-06 12:16:51,837 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 12:16:51,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 7557.4ms TimeCoverageRelationStatistics Valid=8032, Invalid=13430, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 12:16:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 12:16:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-05-06 12:16:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-05-06 12:16:51,845 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2021-05-06 12:16:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:51,845 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-05-06 12:16:51,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-05-06 12:16:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 12:16:51,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:51,845 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:51,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-06 12:16:51,846 INFO L428 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1444599434, now seen corresponding path program 71 times [2021-05-06 12:16:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:51,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344401269] [2021-05-06 12:16:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:51,848 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:51,848 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:51,848 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:53,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:53,994 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:53,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344401269] [2021-05-06 12:16:53,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344401269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:53,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:53,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-06 12:16:53,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869916305] [2021-05-06 12:16:53,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 12:16:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 12:16:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 12:16:53,995 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:16:57,725 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 12:16:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 12:16:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 12:16:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:16:57,725 INFO L225 Difference]: With dead ends: 90 [2021-05-06 12:16:57,726 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 12:16:57,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 5479.5ms TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 12:16:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 12:16:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 12:16:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 82 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-06 12:16:57,733 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2021-05-06 12:16:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:16:57,733 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-06 12:16:57,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:16:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-06 12:16:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 12:16:57,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:16:57,734 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:16:57,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-06 12:16:57,734 INFO L428 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:16:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:16:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1444550615, now seen corresponding path program 72 times [2021-05-06 12:16:57,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:16:57,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51477585] [2021-05-06 12:16:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:16:57,736 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:16:57,736 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:16:57,737 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:16:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:59,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:16:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:16:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:16:59,927 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:16:59,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51477585] [2021-05-06 12:16:59,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [51477585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:16:59,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:16:59,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-06 12:16:59,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502189985] [2021-05-06 12:16:59,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 12:16:59,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:16:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 12:16:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 12:16:59,928 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:05,890 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-05-06 12:17:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 12:17:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 12:17:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:05,891 INFO L225 Difference]: With dead ends: 93 [2021-05-06 12:17:05,891 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 12:17:05,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 7647.0ms TimeCoverageRelationStatistics Valid=8253, Invalid=13799, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 12:17:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 12:17:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-05-06 12:17:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 84 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-05-06 12:17:05,899 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 82 [2021-05-06 12:17:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:05,899 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-05-06 12:17:05,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-05-06 12:17:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 12:17:05,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:05,899 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:05,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-06 12:17:05,900 INFO L428 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1831393034, now seen corresponding path program 72 times [2021-05-06 12:17:05,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:05,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089268280] [2021-05-06 12:17:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:05,902 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:05,902 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:05,902 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:08,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:08,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:08,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089268280] [2021-05-06 12:17:08,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089268280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:08,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:08,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-06 12:17:08,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493241783] [2021-05-06 12:17:08,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 12:17:08,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 12:17:08,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 12:17:08,138 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:12,018 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-05-06 12:17:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 12:17:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-06 12:17:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:12,019 INFO L225 Difference]: With dead ends: 91 [2021-05-06 12:17:12,019 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 12:17:12,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 5645.0ms TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 12:17:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 12:17:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 12:17:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 12:17:12,027 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 83 [2021-05-06 12:17:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:12,027 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 12:17:12,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 12:17:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 12:17:12,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:12,028 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:12,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-06 12:17:12,028 INFO L428 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1831344215, now seen corresponding path program 73 times [2021-05-06 12:17:12,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:12,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206227315] [2021-05-06 12:17:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:12,030 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:12,030 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:12,030 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:14,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:14,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206227315] [2021-05-06 12:17:14,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206227315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:14,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:14,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-06 12:17:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226804248] [2021-05-06 12:17:14,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 12:17:14,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 12:17:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 12:17:14,291 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:20,307 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 12:17:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 12:17:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-06 12:17:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:20,308 INFO L225 Difference]: With dead ends: 94 [2021-05-06 12:17:20,308 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 12:17:20,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 7773.2ms TimeCoverageRelationStatistics Valid=8477, Invalid=14173, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 12:17:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 12:17:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2021-05-06 12:17:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 85 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-05-06 12:17:20,316 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2021-05-06 12:17:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:20,316 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-05-06 12:17:20,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-05-06 12:17:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 12:17:20,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:20,316 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:20,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-06 12:17:20,316 INFO L428 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash -937092746, now seen corresponding path program 73 times [2021-05-06 12:17:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:20,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517207997] [2021-05-06 12:17:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:20,320 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:20,320 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:20,321 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:22,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:22,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:22,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517207997] [2021-05-06 12:17:22,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517207997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:22,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:22,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-06 12:17:22,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491937817] [2021-05-06 12:17:22,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 12:17:22,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 12:17:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 12:17:22,628 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:26,682 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 12:17:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 12:17:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 12:17:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:26,683 INFO L225 Difference]: With dead ends: 92 [2021-05-06 12:17:26,683 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 12:17:26,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 5871.0ms TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 12:17:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 12:17:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-06 12:17:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-06 12:17:26,691 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 84 [2021-05-06 12:17:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:26,691 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-06 12:17:26,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-06 12:17:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 12:17:26,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:26,692 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:26,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-05-06 12:17:26,692 INFO L428 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -937043927, now seen corresponding path program 74 times [2021-05-06 12:17:26,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:26,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718262208] [2021-05-06 12:17:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:26,694 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:26,694 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:26,695 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:29,010 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:29,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718262208] [2021-05-06 12:17:29,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [718262208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:29,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:29,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-06 12:17:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996518967] [2021-05-06 12:17:29,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 12:17:29,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 12:17:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 12:17:29,011 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:35,036 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-05-06 12:17:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 12:17:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 12:17:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:35,036 INFO L225 Difference]: With dead ends: 95 [2021-05-06 12:17:35,037 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 12:17:35,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 7937.3ms TimeCoverageRelationStatistics Valid=8704, Invalid=14552, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 12:17:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 12:17:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-05-06 12:17:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.035294117647059) internal successors, (88), 86 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-05-06 12:17:35,045 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2021-05-06 12:17:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:35,045 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-05-06 12:17:35,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-05-06 12:17:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 12:17:35,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:35,045 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:35,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-06 12:17:35,045 INFO L428 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1016412406, now seen corresponding path program 74 times [2021-05-06 12:17:35,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:35,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550922123] [2021-05-06 12:17:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:35,054 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:35,054 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:35,054 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:37,466 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:37,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550922123] [2021-05-06 12:17:37,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550922123] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:37,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:37,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-06 12:17:37,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553041746] [2021-05-06 12:17:37,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 12:17:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 12:17:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 12:17:37,468 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:41,538 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-05-06 12:17:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 12:17:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 12:17:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:41,538 INFO L225 Difference]: With dead ends: 93 [2021-05-06 12:17:41,538 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 12:17:41,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 5980.0ms TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 12:17:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 12:17:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 12:17:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 12:17:41,546 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2021-05-06 12:17:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:41,546 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 12:17:41,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 12:17:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 12:17:41,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:41,547 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:41,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-05-06 12:17:41,547 INFO L428 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:41,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1016461225, now seen corresponding path program 75 times [2021-05-06 12:17:41,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:41,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352598650] [2021-05-06 12:17:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:41,550 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:41,550 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:41,550 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:43,903 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352598650] [2021-05-06 12:17:43,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1352598650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:43,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:43,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-06 12:17:43,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416077086] [2021-05-06 12:17:43,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 12:17:43,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 12:17:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 12:17:43,904 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:50,177 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 12:17:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 12:17:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 12:17:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:50,178 INFO L225 Difference]: With dead ends: 96 [2021-05-06 12:17:50,178 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 12:17:50,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 8110.0ms TimeCoverageRelationStatistics Valid=8934, Invalid=14936, Unknown=0, NotChecked=0, Total=23870 [2021-05-06 12:17:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 12:17:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-05-06 12:17:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-06 12:17:50,186 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2021-05-06 12:17:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:50,186 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-06 12:17:50,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-06 12:17:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 12:17:50,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:50,187 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:50,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-06 12:17:50,187 INFO L428 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:50,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1445529974, now seen corresponding path program 75 times [2021-05-06 12:17:50,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:50,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235687639] [2021-05-06 12:17:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:50,189 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:50,189 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:50,190 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:52,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:52,613 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:52,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235687639] [2021-05-06 12:17:52,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235687639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:52,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:52,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-06 12:17:52,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794324436] [2021-05-06 12:17:52,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 12:17:52,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 12:17:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 12:17:52,614 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:17:56,787 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 12:17:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 12:17:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 12:17:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:17:56,787 INFO L225 Difference]: With dead ends: 94 [2021-05-06 12:17:56,787 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 12:17:56,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 6154.3ms TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2021-05-06 12:17:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 12:17:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-06 12:17:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-06 12:17:56,796 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 86 [2021-05-06 12:17:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:17:56,796 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-06 12:17:56,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:17:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-06 12:17:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 12:17:56,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:17:56,796 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:17:56,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-06 12:17:56,796 INFO L428 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:17:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:17:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1445578793, now seen corresponding path program 76 times [2021-05-06 12:17:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:17:56,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235348922] [2021-05-06 12:17:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:17:56,799 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:17:56,799 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:17:56,799 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:17:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:17:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:17:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:17:59,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:17:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235348922] [2021-05-06 12:17:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235348922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:17:59,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:17:59,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-06 12:17:59,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953405193] [2021-05-06 12:17:59,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 12:17:59,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:17:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 12:17:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 12:17:59,342 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:05,600 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-05-06 12:18:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 12:18:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 12:18:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:05,601 INFO L225 Difference]: With dead ends: 97 [2021-05-06 12:18:05,601 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 12:18:05,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 8460.2ms TimeCoverageRelationStatistics Valid=9167, Invalid=15325, Unknown=0, NotChecked=0, Total=24492 [2021-05-06 12:18:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 12:18:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-05-06 12:18:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-05-06 12:18:05,610 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2021-05-06 12:18:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:05,610 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-05-06 12:18:05,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-05-06 12:18:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 12:18:05,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:05,610 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:05,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-05-06 12:18:05,610 INFO L428 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1863272694, now seen corresponding path program 76 times [2021-05-06 12:18:05,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:05,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387002019] [2021-05-06 12:18:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:05,614 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:05,614 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:05,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:08,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:08,119 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:08,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387002019] [2021-05-06 12:18:08,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [387002019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:08,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:08,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-06 12:18:08,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047231426] [2021-05-06 12:18:08,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 12:18:08,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 12:18:08,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 12:18:08,120 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:08,929 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 12:18:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:12,975 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-05-06 12:18:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 12:18:12,976 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-06 12:18:12,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:12,976 INFO L225 Difference]: With dead ends: 95 [2021-05-06 12:18:12,976 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 12:18:12,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 6813.8ms TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2021-05-06 12:18:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 12:18:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-06 12:18:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 87 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 12:18:12,985 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 87 [2021-05-06 12:18:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:12,985 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 12:18:12,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 12:18:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 12:18:12,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:12,985 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:12,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-06 12:18:12,985 INFO L428 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1863321513, now seen corresponding path program 77 times [2021-05-06 12:18:12,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:12,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282792094] [2021-05-06 12:18:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:12,987 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:12,987 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:12,988 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:15,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:15,454 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:15,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282792094] [2021-05-06 12:18:15,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282792094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:15,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:15,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-06 12:18:15,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137595544] [2021-05-06 12:18:15,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 12:18:15,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 12:18:15,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 12:18:15,455 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:22,044 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 12:18:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 12:18:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-06 12:18:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:22,045 INFO L225 Difference]: With dead ends: 98 [2021-05-06 12:18:22,045 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 12:18:22,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 8505.0ms TimeCoverageRelationStatistics Valid=9403, Invalid=15719, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 12:18:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 12:18:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-05-06 12:18:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 89 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 12:18:22,054 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2021-05-06 12:18:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:22,054 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 12:18:22,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 12:18:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 12:18:22,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:22,054 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:22,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-06 12:18:22,054 INFO L428 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1928395126, now seen corresponding path program 77 times [2021-05-06 12:18:22,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:22,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490735229] [2021-05-06 12:18:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:22,056 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:22,056 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:22,057 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:24,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:24,561 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490735229] [2021-05-06 12:18:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [490735229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:24,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:24,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-06 12:18:24,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524488149] [2021-05-06 12:18:24,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 12:18:24,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:24,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 12:18:24,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 12:18:24,562 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:28,835 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 12:18:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 12:18:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 12:18:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:28,836 INFO L225 Difference]: With dead ends: 96 [2021-05-06 12:18:28,836 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 12:18:28,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 6311.4ms TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 12:18:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 12:18:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 12:18:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 88 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-06 12:18:28,844 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2021-05-06 12:18:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:28,844 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-06 12:18:28,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-06 12:18:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 12:18:28,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:28,845 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:28,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-05-06 12:18:28,845 INFO L428 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1928443945, now seen corresponding path program 78 times [2021-05-06 12:18:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:28,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246248981] [2021-05-06 12:18:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:28,847 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:28,847 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:28,847 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:31,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:31,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:31,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246248981] [2021-05-06 12:18:31,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [246248981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:31,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:31,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-06 12:18:31,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426359741] [2021-05-06 12:18:31,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 12:18:31,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:31,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 12:18:31,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 12:18:31,355 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:37,929 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-05-06 12:18:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 12:18:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 12:18:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:37,930 INFO L225 Difference]: With dead ends: 99 [2021-05-06 12:18:37,930 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 12:18:37,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 8655.7ms TimeCoverageRelationStatistics Valid=9642, Invalid=16118, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 12:18:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 12:18:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-05-06 12:18:37,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:37,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-05-06 12:18:37,939 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2021-05-06 12:18:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:37,939 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-05-06 12:18:37,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-05-06 12:18:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 12:18:37,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:37,939 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:37,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-05-06 12:18:37,939 INFO L428 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash -347776778, now seen corresponding path program 78 times [2021-05-06 12:18:37,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986549777] [2021-05-06 12:18:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:37,941 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:37,942 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:37,942 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:40,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:40,478 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:40,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986549777] [2021-05-06 12:18:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986549777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:40,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-06 12:18:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12947446] [2021-05-06 12:18:40,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 12:18:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 12:18:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 12:18:40,480 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:44,743 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-05-06 12:18:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 12:18:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-06 12:18:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:44,743 INFO L225 Difference]: With dead ends: 97 [2021-05-06 12:18:44,743 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 12:18:44,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 6421.5ms TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 12:18:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 12:18:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 12:18:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 12:18:44,756 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 89 [2021-05-06 12:18:44,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:44,756 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 12:18:44,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 12:18:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 12:18:44,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:44,756 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:44,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-05-06 12:18:44,756 INFO L428 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -347727959, now seen corresponding path program 79 times [2021-05-06 12:18:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:44,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304518949] [2021-05-06 12:18:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:44,758 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:44,759 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:44,759 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:47,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:47,323 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304518949] [2021-05-06 12:18:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [304518949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:47,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:47,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-06 12:18:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911078069] [2021-05-06 12:18:47,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 12:18:47,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:47,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 12:18:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 12:18:47,325 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:18:53,978 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 12:18:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 12:18:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-06 12:18:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:18:53,979 INFO L225 Difference]: With dead ends: 100 [2021-05-06 12:18:53,979 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 12:18:53,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 8864.4ms TimeCoverageRelationStatistics Valid=9884, Invalid=16522, Unknown=0, NotChecked=0, Total=26406 [2021-05-06 12:18:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 12:18:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-05-06 12:18:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-06 12:18:53,987 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2021-05-06 12:18:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:18:53,987 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-06 12:18:53,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:18:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-06 12:18:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 12:18:53,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:18:53,988 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:18:53,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-05-06 12:18:53,988 INFO L428 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:18:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:18:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2105338230, now seen corresponding path program 79 times [2021-05-06 12:18:53,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:18:53,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006504693] [2021-05-06 12:18:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:18:53,990 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:18:53,990 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:18:53,990 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:18:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:56,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:18:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:18:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:18:56,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:18:56,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006504693] [2021-05-06 12:18:56,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006504693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:18:56,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:18:56,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-06 12:18:56,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026153023] [2021-05-06 12:18:56,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 12:18:56,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:18:56,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 12:18:56,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 12:18:56,610 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:00,906 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 12:19:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 12:19:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 12:19:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:00,907 INFO L225 Difference]: With dead ends: 98 [2021-05-06 12:19:00,907 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 12:19:00,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 6584.5ms TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2021-05-06 12:19:00,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 12:19:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 12:19:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-06 12:19:00,915 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 90 [2021-05-06 12:19:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:00,915 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-06 12:19:00,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-06 12:19:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 12:19:00,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:00,916 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:00,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-05-06 12:19:00,916 INFO L428 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2105387049, now seen corresponding path program 80 times [2021-05-06 12:19:00,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:00,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717928124] [2021-05-06 12:19:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:00,918 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:00,918 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:00,918 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:03,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:03,596 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:03,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717928124] [2021-05-06 12:19:03,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717928124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:03,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:03,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-06 12:19:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805606146] [2021-05-06 12:19:03,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 12:19:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 12:19:03,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 12:19:03,598 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:10,588 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-05-06 12:19:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 12:19:10,589 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 12:19:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:10,589 INFO L225 Difference]: With dead ends: 101 [2021-05-06 12:19:10,589 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 12:19:10,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3398 ImplicationChecksByTransitivity, 9102.9ms TimeCoverageRelationStatistics Valid=10129, Invalid=16931, Unknown=0, NotChecked=0, Total=27060 [2021-05-06 12:19:10,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 12:19:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-05-06 12:19:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-05-06 12:19:10,597 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2021-05-06 12:19:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:10,598 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-05-06 12:19:10,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-05-06 12:19:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 12:19:10,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:10,598 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:10,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-05-06 12:19:10,598 INFO L428 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash 842492150, now seen corresponding path program 80 times [2021-05-06 12:19:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:10,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700284322] [2021-05-06 12:19:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:10,600 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:10,600 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:10,601 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:13,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:13,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:13,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700284322] [2021-05-06 12:19:13,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700284322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:13,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:13,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-06 12:19:13,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957304485] [2021-05-06 12:19:13,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 12:19:13,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 12:19:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 12:19:13,258 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:18,069 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-05-06 12:19:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 12:19:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-06 12:19:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:18,070 INFO L225 Difference]: With dead ends: 99 [2021-05-06 12:19:18,070 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 12:19:18,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 6902.6ms TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2021-05-06 12:19:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 12:19:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 12:19:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 91 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 12:19:18,079 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2021-05-06 12:19:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:18,079 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 12:19:18,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 12:19:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 12:19:18,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:18,079 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:18,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-05-06 12:19:18,079 INFO L428 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash 842540969, now seen corresponding path program 81 times [2021-05-06 12:19:18,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:18,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621562189] [2021-05-06 12:19:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:18,084 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:18,084 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:18,085 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:20,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:20,883 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:20,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621562189] [2021-05-06 12:19:20,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [621562189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:20,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:20,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-06 12:19:20,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393939496] [2021-05-06 12:19:20,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 12:19:20,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 12:19:20,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 12:19:20,885 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:27,924 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 12:19:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 12:19:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-06 12:19:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:27,925 INFO L225 Difference]: With dead ends: 102 [2021-05-06 12:19:27,925 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 12:19:27,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 9230.4ms TimeCoverageRelationStatistics Valid=10377, Invalid=17345, Unknown=0, NotChecked=0, Total=27722 [2021-05-06 12:19:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 12:19:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-05-06 12:19:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-05-06 12:19:27,933 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 91 [2021-05-06 12:19:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:27,933 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-05-06 12:19:27,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-05-06 12:19:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 12:19:27,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:27,934 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:27,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-05-06 12:19:27,934 INFO L428 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:27,934 INFO L82 PathProgramCache]: Analyzing trace with hash 348969334, now seen corresponding path program 81 times [2021-05-06 12:19:27,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:27,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825645354] [2021-05-06 12:19:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:27,937 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:27,938 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:27,938 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:30,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:30,716 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:30,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825645354] [2021-05-06 12:19:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825645354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:30,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:30,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-06 12:19:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493926873] [2021-05-06 12:19:30,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 12:19:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 12:19:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 12:19:30,717 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:35,207 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 12:19:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 12:19:35,208 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 12:19:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:35,208 INFO L225 Difference]: With dead ends: 100 [2021-05-06 12:19:35,208 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 12:19:35,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 6931.1ms TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2021-05-06 12:19:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 12:19:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 12:19:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-06 12:19:35,217 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 92 [2021-05-06 12:19:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:35,217 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-06 12:19:35,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-06 12:19:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 12:19:35,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:35,217 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:35,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-06 12:19:35,217 INFO L428 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash 349018153, now seen corresponding path program 82 times [2021-05-06 12:19:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:35,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261546994] [2021-05-06 12:19:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:35,219 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:35,219 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:35,220 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:38,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:38,066 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:38,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261546994] [2021-05-06 12:19:38,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261546994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:38,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:38,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-06 12:19:38,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529500265] [2021-05-06 12:19:38,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 12:19:38,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:38,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 12:19:38,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 12:19:38,067 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:45,075 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-05-06 12:19:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 12:19:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 12:19:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:45,076 INFO L225 Difference]: With dead ends: 103 [2021-05-06 12:19:45,076 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 12:19:45,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 9429.9ms TimeCoverageRelationStatistics Valid=10628, Invalid=17764, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 12:19:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 12:19:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-05-06 12:19:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.032258064516129) internal successors, (96), 94 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-05-06 12:19:45,085 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 92 [2021-05-06 12:19:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:45,085 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-05-06 12:19:45,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-05-06 12:19:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 12:19:45,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:45,085 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:45,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-05-06 12:19:45,086 INFO L428 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2065336074, now seen corresponding path program 82 times [2021-05-06 12:19:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:45,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949212337] [2021-05-06 12:19:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:45,088 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:45,088 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:45,088 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:47,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:47,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949212337] [2021-05-06 12:19:47,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949212337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:47,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:47,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-06 12:19:47,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084321770] [2021-05-06 12:19:47,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 12:19:47,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 12:19:47,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 12:19:47,878 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:19:52,571 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-05-06 12:19:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 12:19:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-06 12:19:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:19:52,571 INFO L225 Difference]: With dead ends: 101 [2021-05-06 12:19:52,572 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 12:19:52,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 7074.3ms TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 12:19:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 12:19:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-06 12:19:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 93 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 12:19:52,580 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 93 [2021-05-06 12:19:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:19:52,580 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 12:19:52,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:19:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 12:19:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 12:19:52,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:19:52,581 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:19:52,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-05-06 12:19:52,581 INFO L428 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:19:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:19:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2065287255, now seen corresponding path program 83 times [2021-05-06 12:19:52,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:19:52,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105769169] [2021-05-06 12:19:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:19:52,583 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:19:52,583 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:19:52,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:19:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:55,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:19:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:19:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:19:55,480 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:19:55,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105769169] [2021-05-06 12:19:55,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105769169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:19:55,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:19:55,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-06 12:19:55,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702802054] [2021-05-06 12:19:55,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 12:19:55,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:19:55,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 12:19:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 12:19:55,481 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:20:02,896 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 12:20:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 12:20:02,896 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-06 12:20:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:20:02,896 INFO L225 Difference]: With dead ends: 104 [2021-05-06 12:20:02,897 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 12:20:02,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 9804.6ms TimeCoverageRelationStatistics Valid=10882, Invalid=18188, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 12:20:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 12:20:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-05-06 12:20:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-05-06 12:20:02,905 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 93 [2021-05-06 12:20:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:20:02,905 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-05-06 12:20:02,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-05-06 12:20:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 12:20:02,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:20:02,906 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:20:02,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-06 12:20:02,906 INFO L428 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:20:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:20:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash 400607606, now seen corresponding path program 83 times [2021-05-06 12:20:02,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:20:02,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064572786] [2021-05-06 12:20:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:20:02,908 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:20:02,908 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:20:02,908 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:20:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:06,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:20:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:20:06,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:20:06,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064572786] [2021-05-06 12:20:06,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064572786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:20:06,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:20:06,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-06 12:20:06,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115637722] [2021-05-06 12:20:06,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 12:20:06,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:20:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 12:20:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 12:20:06,221 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:20:11,437 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 12:20:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 12:20:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 12:20:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:20:11,438 INFO L225 Difference]: With dead ends: 102 [2021-05-06 12:20:11,438 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 12:20:11,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 7983.8ms TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 12:20:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 12:20:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-06 12:20:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-05-06 12:20:11,446 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2021-05-06 12:20:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:20:11,446 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-05-06 12:20:11,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-05-06 12:20:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 12:20:11,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:20:11,447 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:20:11,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-05-06 12:20:11,447 INFO L428 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:20:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:20:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash 400656425, now seen corresponding path program 84 times [2021-05-06 12:20:11,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:20:11,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084949769] [2021-05-06 12:20:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:20:11,451 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:20:11,451 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:20:11,452 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:20:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:14,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:20:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:20:14,901 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:20:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084949769] [2021-05-06 12:20:14,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084949769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:20:14,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:20:14,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-06 12:20:14,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499027424] [2021-05-06 12:20:14,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 12:20:14,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:20:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 12:20:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 12:20:14,902 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:20:22,771 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-05-06 12:20:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 12:20:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 12:20:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:20:22,772 INFO L225 Difference]: With dead ends: 105 [2021-05-06 12:20:22,772 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 12:20:22,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 10673.9ms TimeCoverageRelationStatistics Valid=11139, Invalid=18617, Unknown=0, NotChecked=0, Total=29756 [2021-05-06 12:20:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 12:20:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-05-06 12:20:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 96 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-05-06 12:20:22,781 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2021-05-06 12:20:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:20:22,781 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-05-06 12:20:22,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-05-06 12:20:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 12:20:22,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:20:22,781 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:20:22,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-05-06 12:20:22,781 INFO L428 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:20:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:20:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -464549642, now seen corresponding path program 84 times [2021-05-06 12:20:22,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:20:22,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539531365] [2021-05-06 12:20:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:20:22,785 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:20:22,785 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:20:22,786 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:20:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:25,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:20:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:20:25,833 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:20:25,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539531365] [2021-05-06 12:20:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [539531365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:20:25,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:20:25,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-06 12:20:25,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526902542] [2021-05-06 12:20:25,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 12:20:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:20:25,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 12:20:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 12:20:25,834 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:20:31,242 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-05-06 12:20:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 12:20:31,243 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-06 12:20:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:20:31,243 INFO L225 Difference]: With dead ends: 103 [2021-05-06 12:20:31,243 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 12:20:31,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 7858.2ms TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2021-05-06 12:20:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 12:20:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 12:20:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 12:20:31,252 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 95 [2021-05-06 12:20:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:20:31,252 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 12:20:31,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 12:20:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 12:20:31,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:20:31,253 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:20:31,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-05-06 12:20:31,253 INFO L428 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:20:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:20:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash -464500823, now seen corresponding path program 85 times [2021-05-06 12:20:31,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:20:31,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617750770] [2021-05-06 12:20:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:20:31,257 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:20:31,257 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:20:31,258 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:20:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:34,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:20:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:20:34,575 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:20:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617750770] [2021-05-06 12:20:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617750770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:20:34,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:20:34,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-06 12:20:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23219320] [2021-05-06 12:20:34,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 12:20:34,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:20:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 12:20:34,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 12:20:34,576 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:20:42,531 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 12:20:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 12:20:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-06 12:20:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:20:42,532 INFO L225 Difference]: With dead ends: 106 [2021-05-06 12:20:42,532 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 12:20:42,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3823 ImplicationChecksByTransitivity, 10837.3ms TimeCoverageRelationStatistics Valid=11399, Invalid=19051, Unknown=0, NotChecked=0, Total=30450 [2021-05-06 12:20:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 12:20:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-05-06 12:20:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 97 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-06 12:20:42,541 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2021-05-06 12:20:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:20:42,541 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-06 12:20:42,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-06 12:20:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 12:20:42,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:20:42,542 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:20:42,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-05-06 12:20:42,542 INFO L428 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:20:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:20:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1514620554, now seen corresponding path program 85 times [2021-05-06 12:20:42,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:20:42,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036427859] [2021-05-06 12:20:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:20:42,546 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:20:42,546 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:20:42,547 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:20:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:20:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:20:45,823 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:20:45,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036427859] [2021-05-06 12:20:45,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036427859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:20:45,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:20:45,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-06 12:20:45,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268347764] [2021-05-06 12:20:45,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 12:20:45,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:20:45,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 12:20:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 12:20:45,824 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:20:51,259 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 12:20:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 12:20:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 12:20:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:20:51,260 INFO L225 Difference]: With dead ends: 104 [2021-05-06 12:20:51,260 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 12:20:51,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 8193.6ms TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2021-05-06 12:20:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 12:20:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 12:20:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-05-06 12:20:51,269 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 96 [2021-05-06 12:20:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:20:51,269 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-05-06 12:20:51,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:20:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-05-06 12:20:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 12:20:51,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:20:51,270 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:20:51,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-05-06 12:20:51,270 INFO L428 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:20:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:20:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1514571735, now seen corresponding path program 86 times [2021-05-06 12:20:51,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:20:51,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605004736] [2021-05-06 12:20:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:20:51,272 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:20:51,272 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:20:51,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:20:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:54,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:20:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:20:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:20:54,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:20:54,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605004736] [2021-05-06 12:20:54,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605004736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:20:54,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:20:54,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-06 12:20:54,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434680894] [2021-05-06 12:20:54,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 12:20:54,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:20:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 12:20:54,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 12:20:54,611 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:02,683 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-05-06 12:21:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 12:21:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 12:21:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:02,684 INFO L225 Difference]: With dead ends: 107 [2021-05-06 12:21:02,684 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 12:21:02,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 10778.8ms TimeCoverageRelationStatistics Valid=11662, Invalid=19490, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 12:21:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 12:21:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2021-05-06 12:21:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-05-06 12:21:02,693 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2021-05-06 12:21:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:02,694 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-05-06 12:21:02,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-05-06 12:21:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 12:21:02,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:02,694 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:02,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-05-06 12:21:02,694 INFO L428 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 292919542, now seen corresponding path program 86 times [2021-05-06 12:21:02,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:02,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583352448] [2021-05-06 12:21:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:02,697 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:21:02,697 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:21:02,697 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:06,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:06,157 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:06,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583352448] [2021-05-06 12:21:06,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [583352448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:06,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:06,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-06 12:21:06,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018456456] [2021-05-06 12:21:06,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 12:21:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 12:21:06,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 12:21:06,159 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:11,283 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-05-06 12:21:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 12:21:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-06 12:21:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:11,283 INFO L225 Difference]: With dead ends: 105 [2021-05-06 12:21:11,283 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 12:21:11,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 8157.7ms TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 12:21:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 12:21:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 12:21:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 97 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 12:21:11,293 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2021-05-06 12:21:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:11,293 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 12:21:11,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 12:21:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 12:21:11,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:11,293 INFO L523 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:11,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-05-06 12:21:11,293 INFO L428 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash 292968361, now seen corresponding path program 87 times [2021-05-06 12:21:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:11,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545577211] [2021-05-06 12:21:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:11,295 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:21:11,295 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:21:11,296 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:14,518 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:14,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545577211] [2021-05-06 12:21:14,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [545577211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:14,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:14,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-06 12:21:14,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200491915] [2021-05-06 12:21:14,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 12:21:14,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 12:21:14,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 12:21:14,519 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:22,398 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-06 12:21:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 12:21:22,398 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-06 12:21:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:22,398 INFO L225 Difference]: With dead ends: 108 [2021-05-06 12:21:22,398 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 12:21:22,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 10617.8ms TimeCoverageRelationStatistics Valid=11928, Invalid=19934, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 12:21:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 12:21:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-05-06 12:21:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-05-06 12:21:22,408 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 97 [2021-05-06 12:21:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:22,408 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-05-06 12:21:22,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-05-06 12:21:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 12:21:22,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:22,408 INFO L523 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:22,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-06 12:21:22,408 INFO L428 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash 492087670, now seen corresponding path program 87 times [2021-05-06 12:21:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633611576] [2021-05-06 12:21:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:22,411 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:21:22,412 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:21:22,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:25,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:25,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:25,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633611576] [2021-05-06 12:21:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [633611576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-06 12:21:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651295761] [2021-05-06 12:21:25,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 12:21:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 12:21:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 12:21:25,726 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:31,135 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 12:21:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 12:21:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 12:21:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:31,136 INFO L225 Difference]: With dead ends: 106 [2021-05-06 12:21:31,136 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 12:21:31,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 8187.6ms TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 12:21:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 12:21:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-06 12:21:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 98 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-06 12:21:31,145 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 98 [2021-05-06 12:21:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:31,145 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-06 12:21:31,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-06 12:21:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 12:21:31,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:31,146 INFO L523 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:31,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-05-06 12:21:31,146 INFO L428 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash 492136489, now seen corresponding path program 88 times [2021-05-06 12:21:31,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:31,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565094647] [2021-05-06 12:21:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:31,148 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:21:31,148 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:21:31,149 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:34,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:34,382 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:34,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565094647] [2021-05-06 12:21:34,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [565094647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:34,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:34,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-06 12:21:34,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455980351] [2021-05-06 12:21:34,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 12:21:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 12:21:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 12:21:34,383 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 92 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:42,403 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-05-06 12:21:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 12:21:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 12:21:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:42,404 INFO L225 Difference]: With dead ends: 109 [2021-05-06 12:21:42,404 INFO L226 Difference]: Without dead ends: 107 [2021-05-06 12:21:42,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4090 ImplicationChecksByTransitivity, 10840.0ms TimeCoverageRelationStatistics Valid=12197, Invalid=20383, Unknown=0, NotChecked=0, Total=32580 [2021-05-06 12:21:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-06 12:21:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-05-06 12:21:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 100 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-05-06 12:21:42,413 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 98 [2021-05-06 12:21:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:42,413 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-05-06 12:21:42,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-05-06 12:21:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 12:21:42,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:42,413 INFO L523 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:42,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-05-06 12:21:42,414 INFO L428 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1923634954, now seen corresponding path program 88 times [2021-05-06 12:21:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:42,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598038182] [2021-05-06 12:21:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:42,415 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:21:42,416 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:21:42,416 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:45,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:45,659 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:45,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598038182] [2021-05-06 12:21:45,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [598038182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:45,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:45,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-06 12:21:45,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654290777] [2021-05-06 12:21:45,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 12:21:45,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 12:21:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 12:21:45,660 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:51,129 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-05-06 12:21:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 12:21:51,130 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-06 12:21:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:51,130 INFO L225 Difference]: With dead ends: 107 [2021-05-06 12:21:51,130 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 12:21:51,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 8244.4ms TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2021-05-06 12:21:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 12:21:51,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 12:21:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 99 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-06 12:21:51,139 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 99 [2021-05-06 12:21:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:51,140 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-06 12:21:51,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-06 12:21:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 12:21:51,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:51,140 INFO L523 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:51,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-05-06 12:21:51,140 INFO L428 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:51,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1923586135, now seen corresponding path program 89 times [2021-05-06 12:21:51,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:51,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808525599] [2021-05-06 12:21:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:51,142 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:21:51,142 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:21:51,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:54,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:54,491 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:54,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808525599] [2021-05-06 12:21:54,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [808525599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:54,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:54,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-06 12:21:54,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369768579] [2021-05-06 12:21:54,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 12:21:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 12:21:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 12:21:54,493 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 93 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:22:02,726 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-06 12:22:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 12:22:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-06 12:22:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:22:02,727 INFO L225 Difference]: With dead ends: 110 [2021-05-06 12:22:02,727 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 12:22:02,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 11046.5ms TimeCoverageRelationStatistics Valid=12469, Invalid=20837, Unknown=0, NotChecked=0, Total=33306 [2021-05-06 12:22:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 12:22:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2021-05-06 12:22:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 101 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-05-06 12:22:02,736 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 99 [2021-05-06 12:22:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:22:02,736 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-05-06 12:22:02,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-05-06 12:22:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 12:22:02,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:22:02,737 INFO L523 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:22:02,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-05-06 12:22:02,737 INFO L428 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:22:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:22:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 498375030, now seen corresponding path program 89 times [2021-05-06 12:22:02,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:22:02,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171378820] [2021-05-06 12:22:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:22:02,739 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:22:02,739 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:22:02,739 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:22:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:22:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:22:06,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:22:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171378820] [2021-05-06 12:22:06,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171378820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:22:06,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:22:06,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-06 12:22:06,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358192581] [2021-05-06 12:22:06,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 12:22:06,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:22:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 12:22:06,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 12:22:06,055 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:22:11,547 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-06 12:22:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 12:22:11,549 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 12:22:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:22:11,550 INFO L225 Difference]: With dead ends: 108 [2021-05-06 12:22:11,550 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 12:22:11,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 8340.5ms TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2021-05-06 12:22:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 12:22:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-06 12:22:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-05-06 12:22:11,559 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2021-05-06 12:22:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:22:11,559 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-05-06 12:22:11,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-05-06 12:22:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 12:22:11,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:22:11,560 INFO L523 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:22:11,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-05-06 12:22:11,560 INFO L428 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:22:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:22:11,560 INFO L82 PathProgramCache]: Analyzing trace with hash 498423849, now seen corresponding path program 90 times [2021-05-06 12:22:11,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:22:11,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064569989] [2021-05-06 12:22:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:22:11,562 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:22:11,562 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:22:11,562 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:22:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:14,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:22:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:22:14,887 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:22:14,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064569989] [2021-05-06 12:22:14,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064569989] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:22:14,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:22:14,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-06 12:22:14,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115764513] [2021-05-06 12:22:14,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 12:22:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:22:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 12:22:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 12:22:14,888 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:22:23,164 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2021-05-06 12:22:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 12:22:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 12:22:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:22:23,165 INFO L225 Difference]: With dead ends: 111 [2021-05-06 12:22:23,165 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 12:22:23,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 11074.4ms TimeCoverageRelationStatistics Valid=12744, Invalid=21296, Unknown=0, NotChecked=0, Total=34040 [2021-05-06 12:22:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 12:22:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-05-06 12:22:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 102 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-05-06 12:22:23,180 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2021-05-06 12:22:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:22:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-05-06 12:22:23,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-05-06 12:22:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 12:22:23,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:22:23,180 INFO L523 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:22:23,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-05-06 12:22:23,180 INFO L428 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:22:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:22:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1728726794, now seen corresponding path program 90 times [2021-05-06 12:22:23,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:22:23,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479836022] [2021-05-06 12:22:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:22:23,182 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:22:23,182 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:22:23,183 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:22:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:22:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:22:26,544 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:22:26,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479836022] [2021-05-06 12:22:26,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479836022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:22:26,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:22:26,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-06 12:22:26,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981158298] [2021-05-06 12:22:26,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 12:22:26,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:22:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 12:22:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 12:22:26,550 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:22:32,149 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-05-06 12:22:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 12:22:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-06 12:22:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:22:32,150 INFO L225 Difference]: With dead ends: 109 [2021-05-06 12:22:32,150 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 12:22:32,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 8493.9ms TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2021-05-06 12:22:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 12:22:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-06 12:22:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 101 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-06 12:22:32,159 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 101 [2021-05-06 12:22:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:22:32,159 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-06 12:22:32,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-06 12:22:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 12:22:32,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:22:32,160 INFO L523 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:22:32,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-05-06 12:22:32,160 INFO L428 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:22:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:22:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1728677975, now seen corresponding path program 91 times [2021-05-06 12:22:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:22:32,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724537325] [2021-05-06 12:22:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:22:32,162 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 12:22:32,162 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-06 12:22:32,162 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:22:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:35,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:22:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:22:35,605 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:22:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724537325] [2021-05-06 12:22:35,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [724537325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:22:35,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:22:35,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-06 12:22:35,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36382183] [2021-05-06 12:22:35,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-06 12:22:35,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:22:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-06 12:22:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 12:22:35,606 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 95 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)