/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-lit/jm2006_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:43:55,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:43:55,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:43:55,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:43:55,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:43:55,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:43:55,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:43:55,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:43:55,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:43:55,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:43:55,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:43:55,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:43:55,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:43:55,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:43:55,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:43:55,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:43:55,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:43:55,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:43:55,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:43:55,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:43:55,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:43:55,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:43:55,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:43:55,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:43:55,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:43:55,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:43:55,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:43:55,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:43:55,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:43:55,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:43:55,491 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:43:55,491 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:43:55,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:43:56,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:43:56,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:43:56,012 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:43:56,013 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:43:56,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant.i [2021-05-02 23:43:56,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f004ffc8a/701469f1d6e34ec1ad72ae5ab2f2d153/FLAGc2af1c690 [2021-05-02 23:43:56,697 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:43:56,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant.i [2021-05-02 23:43:56,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f004ffc8a/701469f1d6e34ec1ad72ae5ab2f2d153/FLAGc2af1c690 [2021-05-02 23:43:57,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f004ffc8a/701469f1d6e34ec1ad72ae5ab2f2d153 [2021-05-02 23:43:57,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:43:57,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:43:57,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:43:57,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:43:57,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:43:57,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358da51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57, skipping insertion in model container [2021-05-02 23:43:57,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:43:57,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:43:57,310 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-lit/jm2006_variant.i[895,908] [2021-05-02 23:43:57,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:43:57,338 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:43:57,362 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-lit/jm2006_variant.i[895,908] [2021-05-02 23:43:57,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:43:57,410 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:43:57,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57 WrapperNode [2021-05-02 23:43:57,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:43:57,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:43:57,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:43:57,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:43:57,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... [2021-05-02 23:43:57,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:43:57,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:43:57,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:43:57,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:43:57,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:43:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:43:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:43:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:43:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:43:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:43:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:43:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:43:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:43:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:43:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:43:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:43:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:43:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:43:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:43:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:43:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:43:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:43:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:43:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:43:57,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:43:57,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:43:57,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:43:57,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:43:57,920 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:43:57,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:43:57 BoogieIcfgContainer [2021-05-02 23:43:57,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:43:57,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:43:57,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:43:57,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:43:57,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:43:57" (1/3) ... [2021-05-02 23:43:57,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f61bc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:43:57, skipping insertion in model container [2021-05-02 23:43:57,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:43:57" (2/3) ... [2021-05-02 23:43:57,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f61bc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:43:57, skipping insertion in model container [2021-05-02 23:43:57,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:43:57" (3/3) ... [2021-05-02 23:43:57,931 INFO L111 eAbstractionObserver]: Analyzing ICFG jm2006_variant.i [2021-05-02 23:43:57,937 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:43:57,942 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:43:57,960 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:43:57,982 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:43:57,983 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:43:57,983 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:43:57,983 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:43:57,983 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:43:57,983 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:43:57,983 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:43:57,983 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:43:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:43:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:43:58,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:58,007 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:58,008 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash -522767122, now seen corresponding path program 1 times [2021-05-02 23:43:58,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:58,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167036168] [2021-05-02 23:43:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:58,100 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:43:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:58,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:58,363 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:58,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167036168] [2021-05-02 23:43:58,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167036168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:58,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:58,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:43:58,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773932216] [2021-05-02 23:43:58,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:43:58,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:43:58,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:43:58,394 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:58,516 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-02 23:43:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:43:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 23:43:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:58,528 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:43:58,529 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:43:58,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:43:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:43:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:43:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:43:58,586 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 14 [2021-05-02 23:43:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:58,587 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:43:58,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:43:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:43:58,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:58,589 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:58,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:43:58,590 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash -637283726, now seen corresponding path program 1 times [2021-05-02 23:43:58,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:58,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864162576] [2021-05-02 23:43:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:58,607 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:43:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:59,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:59,029 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:59,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864162576] [2021-05-02 23:43:59,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [864162576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:59,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:59,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:43:59,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580085211] [2021-05-02 23:43:59,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:43:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:43:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:43:59,032 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:59,379 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:43:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:43:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 23:43:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:59,381 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:43:59,381 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:43:59,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:43:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:43:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 23:43:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:43:59,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 23:43:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:59,390 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:43:59,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:43:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:43:59,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:59,391 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:59,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:43:59,391 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1050868340, now seen corresponding path program 1 times [2021-05-02 23:43:59,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:59,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803048121] [2021-05-02 23:43:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:59,507 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_6 0)) InVars {main_~x~0=v_main_~x~0_6} OutVars{main_~x~0=v_main_~x~0_6} AuxVars[] AssignedVars[] [2021-05-02 23:43:59,542 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:43:59,552 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:59,571 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:43:59,647 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:43:59,705 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:00,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:00,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:00,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:00,348 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803048121] [2021-05-02 23:44:00,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803048121] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:00,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:00,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:44:00,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055559623] [2021-05-02 23:44:00,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:44:00,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:44:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:44:00,359 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:00,872 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 23:44:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:44:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:44:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:00,875 INFO L225 Difference]: With dead ends: 23 [2021-05-02 23:44:00,875 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:44:00,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:44:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:44:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:44:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:44:00,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-02 23:44:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:00,887 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:44:00,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:44:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:44:00,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:00,888 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:00,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:44:00,889 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -987089486, now seen corresponding path program 2 times [2021-05-02 23:44:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:00,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138813191] [2021-05-02 23:44:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:00,913 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_10 0)) InVars {main_~x~0=v_main_~x~0_10} OutVars{main_~x~0=v_main_~x~0_10} AuxVars[] AssignedVars[] [2021-05-02 23:44:00,933 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:00,976 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:00,983 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:01,004 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:01,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:01,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:01,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:01,467 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:01,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138813191] [2021-05-02 23:44:01,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138813191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:01,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:01,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:44:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043693556] [2021-05-02 23:44:01,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:44:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:44:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:44:01,470 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:02,013 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:44:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:44:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 23:44:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:02,018 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:44:02,018 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:44:02,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:44:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:44:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:44:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:44:02,026 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-02 23:44:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:02,026 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:44:02,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:44:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:44:02,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:02,027 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:02,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:44:02,027 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash 990054988, now seen corresponding path program 3 times [2021-05-02 23:44:02,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:02,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356082782] [2021-05-02 23:44:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:02,048 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_15 0)) InVars {main_~x~0=v_main_~x~0_15} OutVars{main_~x~0=v_main_~x~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:44:02,056 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:02,059 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:02,066 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:02,106 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:02,137 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:02,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:02,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:02,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:02,639 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:02,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356082782] [2021-05-02 23:44:02,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356082782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:02,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:02,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:44:02,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809150997] [2021-05-02 23:44:02,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:44:02,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:44:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:44:02,642 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:03,264 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-02 23:44:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:44:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:44:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:03,271 INFO L225 Difference]: With dead ends: 25 [2021-05-02 23:44:03,273 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:44:03,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:44:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:44:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 23:44:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 23:44:03,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-02 23:44:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:03,288 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 23:44:03,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 23:44:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:44:03,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:03,290 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:03,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:44:03,291 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:03,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2142975758, now seen corresponding path program 4 times [2021-05-02 23:44:03,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:03,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106700920] [2021-05-02 23:44:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:03,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_21 0)) InVars {main_~x~0=v_main_~x~0_21} OutVars{main_~x~0=v_main_~x~0_21} AuxVars[] AssignedVars[] [2021-05-02 23:44:03,312 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:03,355 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:03,364 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:03,384 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:03,407 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:03,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:03,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:03,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:03,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:03,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:03,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106700920] [2021-05-02 23:44:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106700920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:03,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:03,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:44:03,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68646711] [2021-05-02 23:44:03,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:44:03,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:03,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:44:03,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:44:03,826 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:04,540 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:44:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:44:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:44:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:04,542 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:44:04,542 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:44:04,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:44:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:44:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 23:44:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-02 23:44:04,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-02 23:44:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:04,562 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-02 23:44:04,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-02 23:44:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:44:04,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:04,564 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:04,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:44:04,565 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash -482681076, now seen corresponding path program 5 times [2021-05-02 23:44:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:04,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135567651] [2021-05-02 23:44:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:04,582 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_28 0)) InVars {main_~x~0=v_main_~x~0_28} OutVars{main_~x~0=v_main_~x~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:44:04,588 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:04,601 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:04,607 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:04,645 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:04,670 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:04,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:04,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:04,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:04,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:05,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:05,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:05,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:05,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135567651] [2021-05-02 23:44:05,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1135567651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:05,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:05,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:44:05,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439515897] [2021-05-02 23:44:05,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:44:05,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:44:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:44:05,246 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:06,034 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2021-05-02 23:44:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:06,128 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-02 23:44:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:44:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:44:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:06,130 INFO L225 Difference]: With dead ends: 27 [2021-05-02 23:44:06,130 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:44:06,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:44:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:44:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 23:44:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 23:44:06,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-02 23:44:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:06,139 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 23:44:06,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 23:44:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:44:06,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:06,140 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:06,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:44:06,141 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -553153486, now seen corresponding path program 6 times [2021-05-02 23:44:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:06,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96100130] [2021-05-02 23:44:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:06,149 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_36 0)) InVars {main_~x~0=v_main_~x~0_36} OutVars{main_~x~0=v_main_~x~0_36} AuxVars[] AssignedVars[] [2021-05-02 23:44:06,153 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:06,155 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:06,161 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:06,206 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:06,230 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:06,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:06,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:06,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:06,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96100130] [2021-05-02 23:44:06,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [96100130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:06,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:06,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:44:06,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114451344] [2021-05-02 23:44:06,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:44:06,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:44:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:44:06,953 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:07,886 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:44:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:44:07,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:44:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:07,888 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:44:07,888 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:44:07,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1214.2ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:44:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:44:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 23:44:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 23:44:07,897 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-02 23:44:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:07,898 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 23:44:07,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 23:44:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:44:07,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:07,898 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:07,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:44:07,899 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1557169100, now seen corresponding path program 7 times [2021-05-02 23:44:07,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:07,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326840438] [2021-05-02 23:44:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:07,908 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_45 0)) InVars {main_~x~0=v_main_~x~0_45} OutVars{main_~x~0=v_main_~x~0_45} AuxVars[] AssignedVars[] [2021-05-02 23:44:07,912 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:07,914 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:07,920 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:07,970 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:08,023 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:08,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:08,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:08,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326840438] [2021-05-02 23:44:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326840438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:08,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:08,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:44:08,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428789759] [2021-05-02 23:44:08,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:44:08,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:44:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:44:08,675 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:09,600 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-02 23:44:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:44:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:44:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:09,601 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:44:09,602 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:44:09,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1112.9ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:44:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:44:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 23:44:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 23:44:09,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-02 23:44:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:09,612 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 23:44:09,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 23:44:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:44:09,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:09,613 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:09,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:44:09,613 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:09,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1742307470, now seen corresponding path program 8 times [2021-05-02 23:44:09,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:09,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791086404] [2021-05-02 23:44:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:09,621 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_55 0)) InVars {main_~x~0=v_main_~x~0_55} OutVars{main_~x~0=v_main_~x~0_55} AuxVars[] AssignedVars[] [2021-05-02 23:44:09,624 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:09,645 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:09,650 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:09,672 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:09,695 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:09,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:09,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:09,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:09,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:09,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:10,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:10,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:10,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:10,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:10,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:10,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791086404] [2021-05-02 23:44:10,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [791086404] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:10,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:10,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:44:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142296814] [2021-05-02 23:44:10,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:44:10,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:44:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:44:10,309 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:11,264 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:44:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:44:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 23:44:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:11,265 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:44:11,265 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:44:11,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:44:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:44:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 23:44:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 23:44:11,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-02 23:44:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:11,277 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 23:44:11,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 23:44:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:44:11,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:11,278 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:11,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:44:11,278 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:11,279 INFO L82 PathProgramCache]: Analyzing trace with hash -946866036, now seen corresponding path program 9 times [2021-05-02 23:44:11,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:11,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471877287] [2021-05-02 23:44:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:11,286 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_66 0)) InVars {main_~x~0=v_main_~x~0_66} OutVars{main_~x~0=v_main_~x~0_66} AuxVars[] AssignedVars[] [2021-05-02 23:44:11,289 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:11,315 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:11,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:11,351 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:11,368 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:11,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:11,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:11,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:12,060 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:12,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471877287] [2021-05-02 23:44:12,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471877287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:12,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:12,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:44:12,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313973103] [2021-05-02 23:44:12,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:44:12,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:44:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:44:12,062 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:13,231 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-02 23:44:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:44:13,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:44:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:13,232 INFO L225 Difference]: With dead ends: 31 [2021-05-02 23:44:13,232 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:44:13,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1357.2ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:44:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:44:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 23:44:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 23:44:13,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-02 23:44:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:13,243 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 23:44:13,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 23:44:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:44:13,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:13,244 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:13,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:44:13,245 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2057985358, now seen corresponding path program 10 times [2021-05-02 23:44:13,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:13,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641672934] [2021-05-02 23:44:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:13,253 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_78 0)) InVars {main_~x~0=v_main_~x~0_78} OutVars{main_~x~0=v_main_~x~0_78} AuxVars[] AssignedVars[] [2021-05-02 23:44:13,257 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:13,279 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:13,285 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:13,300 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:13,326 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:13,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:13,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:13,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:14,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:14,210 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:14,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641672934] [2021-05-02 23:44:14,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1641672934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:14,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:14,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:44:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991883791] [2021-05-02 23:44:14,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:44:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:44:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:44:14,213 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:15,546 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:44:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:44:15,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 23:44:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:15,547 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:44:15,547 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:44:15,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1640.5ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:44:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:44:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 23:44:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-02 23:44:15,559 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-02 23:44:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:15,559 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-02 23:44:15,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-02 23:44:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:44:15,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:15,560 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:15,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:44:15,560 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2142945972, now seen corresponding path program 11 times [2021-05-02 23:44:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:15,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256773986] [2021-05-02 23:44:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:15,568 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_91 0)) InVars {main_~x~0=v_main_~x~0_91} OutVars{main_~x~0=v_main_~x~0_91} AuxVars[] AssignedVars[] [2021-05-02 23:44:15,572 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:15,592 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:15,600 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:15,616 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:15,637 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:15,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:15,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:15,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:16,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:16,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256773986] [2021-05-02 23:44:16,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256773986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:16,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:16,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:44:16,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464440693] [2021-05-02 23:44:16,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:44:16,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:44:16,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:44:16,574 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:17,980 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-02 23:44:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:44:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:44:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:17,982 INFO L225 Difference]: With dead ends: 33 [2021-05-02 23:44:17,982 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:44:17,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1749.8ms TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:44:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:44:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 23:44:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 23:44:17,995 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-02 23:44:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:17,996 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 23:44:17,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 23:44:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:44:17,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:17,997 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:17,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:44:17,997 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash -481757710, now seen corresponding path program 12 times [2021-05-02 23:44:17,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:17,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286059551] [2021-05-02 23:44:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:18,005 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_105 0)) InVars {main_~x~0=v_main_~x~0_105} OutVars{main_~x~0=v_main_~x~0_105} AuxVars[] AssignedVars[] [2021-05-02 23:44:18,009 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:18,037 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:18,044 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:18,061 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:18,083 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:18,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:18,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:19,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:19,192 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:19,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286059551] [2021-05-02 23:44:19,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [286059551] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:19,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:19,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:44:19,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702307134] [2021-05-02 23:44:19,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:44:19,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:44:19,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:44:19,201 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:20,985 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:44:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:44:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 23:44:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:20,987 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:44:20,987 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:44:20,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2170.7ms TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:44:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:44:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 23:44:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 23:44:21,000 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-02 23:44:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:21,000 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 23:44:21,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 23:44:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:44:21,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:21,001 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:21,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:44:21,002 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -524529140, now seen corresponding path program 13 times [2021-05-02 23:44:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:21,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900567031] [2021-05-02 23:44:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:21,009 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_120 0)) InVars {main_~x~0=v_main_~x~0_120} OutVars{main_~x~0=v_main_~x~0_120} AuxVars[] AssignedVars[] [2021-05-02 23:44:21,012 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:21,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:21,018 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:21,047 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:21,065 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:22,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:22,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:22,274 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:22,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900567031] [2021-05-02 23:44:22,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [900567031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:22,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:22,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:44:22,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840514969] [2021-05-02 23:44:22,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:44:22,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:22,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:44:22,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:44:22,276 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:24,093 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-02 23:44:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:44:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:44:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:24,094 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:44:24,094 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:44:24,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2260.8ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:44:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:44:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 23:44:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 23:44:24,105 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-02 23:44:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:24,106 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 23:44:24,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 23:44:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:44:24,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:24,106 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:24,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:44:24,107 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1850443470, now seen corresponding path program 14 times [2021-05-02 23:44:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:24,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67568110] [2021-05-02 23:44:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:24,125 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_136 0)) InVars {main_~x~0=v_main_~x~0_136} OutVars{main_~x~0=v_main_~x~0_136} AuxVars[] AssignedVars[] [2021-05-02 23:44:24,129 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:24,148 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:24,154 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:24,168 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:24,186 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:24,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:24,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:25,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:25,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:25,284 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:25,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67568110] [2021-05-02 23:44:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [67568110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:25,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:25,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:44:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352429101] [2021-05-02 23:44:25,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:44:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:44:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:44:25,286 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:27,317 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:44:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:44:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 23:44:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:27,318 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:44:27,318 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:44:27,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2362.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:44:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:44:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 23:44:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 23:44:27,332 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-02 23:44:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:27,332 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 23:44:27,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 23:44:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:44:27,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:27,333 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:27,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:44:27,333 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash -4114740, now seen corresponding path program 15 times [2021-05-02 23:44:27,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:27,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443127718] [2021-05-02 23:44:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:27,342 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_153 0)) InVars {main_~x~0=v_main_~x~0_153} OutVars{main_~x~0=v_main_~x~0_153} AuxVars[] AssignedVars[] [2021-05-02 23:44:27,345 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:27,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:27,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:27,383 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:27,405 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:27,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:27,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:27,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:28,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443127718] [2021-05-02 23:44:28,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443127718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:28,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:44:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994828466] [2021-05-02 23:44:28,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:44:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:44:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:44:28,865 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:31,076 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 79 [2021-05-02 23:44:31,281 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2021-05-02 23:44:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:31,406 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-02 23:44:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:44:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:44:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:31,409 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:44:31,409 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:44:31,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3060.3ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:44:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:44:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 23:44:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 23:44:31,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-02 23:44:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:31,444 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 23:44:31,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 23:44:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:44:31,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:31,449 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:31,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:44:31,450 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1397501042, now seen corresponding path program 16 times [2021-05-02 23:44:31,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:31,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869242158] [2021-05-02 23:44:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:31,463 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_171 0)) InVars {main_~x~0=v_main_~x~0_171} OutVars{main_~x~0=v_main_~x~0_171} AuxVars[] AssignedVars[] [2021-05-02 23:44:31,466 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:31,469 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:31,476 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:31,512 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:31,534 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:31,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:31,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:31,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:31,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:31,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:31,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:32,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:33,081 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:33,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869242158] [2021-05-02 23:44:33,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [869242158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:33,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:33,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:44:33,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319649354] [2021-05-02 23:44:33,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:44:33,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:33,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:44:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:44:33,084 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:35,404 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 74 [2021-05-02 23:44:35,640 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 78 [2021-05-02 23:44:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:35,708 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:44:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:44:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:44:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:35,709 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:44:35,709 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:44:35,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3296.1ms TimeCoverageRelationStatistics Valid=216, Invalid=2136, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:44:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:44:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 23:44:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-02 23:44:35,727 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-02 23:44:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:35,727 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-02 23:44:35,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-02 23:44:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:44:35,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:35,728 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:35,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:44:35,728 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1897917324, now seen corresponding path program 17 times [2021-05-02 23:44:35,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:35,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789104907] [2021-05-02 23:44:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:35,738 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_190 0)) InVars {main_~x~0=v_main_~x~0_190} OutVars{main_~x~0=v_main_~x~0_190} AuxVars[] AssignedVars[] [2021-05-02 23:44:35,741 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:35,742 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:35,747 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:35,781 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:35,805 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:35,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:35,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:35,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:36,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:37,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:37,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:37,406 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:37,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789104907] [2021-05-02 23:44:37,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1789104907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:37,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:37,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:44:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701310438] [2021-05-02 23:44:37,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:44:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:44:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:44:37,409 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:40,010 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 77 [2021-05-02 23:44:40,254 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 81 [2021-05-02 23:44:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:40,377 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 23:44:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:44:40,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:44:40,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:40,379 INFO L225 Difference]: With dead ends: 39 [2021-05-02 23:44:40,379 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:44:40,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3558.9ms TimeCoverageRelationStatistics Valid=193, Invalid=2159, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:44:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:44:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 23:44:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 23:44:40,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-02 23:44:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:40,399 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 23:44:40,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 23:44:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:44:40,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:40,400 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:40,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:44:40,400 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 230952882, now seen corresponding path program 18 times [2021-05-02 23:44:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:40,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170188540] [2021-05-02 23:44:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:40,410 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_210 0)) InVars {main_~x~0=v_main_~x~0_210} OutVars{main_~x~0=v_main_~x~0_210} AuxVars[] AssignedVars[] [2021-05-02 23:44:40,414 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:40,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:40,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:40,461 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:40,489 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:40,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:40,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:40,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:41,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:42,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:42,454 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:42,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170188540] [2021-05-02 23:44:42,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [170188540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:42,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:42,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:44:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238261049] [2021-05-02 23:44:42,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:44:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:44:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:44:42,456 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:45,829 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 78 [2021-05-02 23:44:46,075 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 83 [2021-05-02 23:44:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:46,220 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:44:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:44:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 23:44:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:46,221 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:44:46,221 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:44:46,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 4352.3ms TimeCoverageRelationStatistics Valid=202, Invalid=2348, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:44:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:44:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 23:44:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-02 23:44:46,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-02 23:44:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:46,237 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-02 23:44:46,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-02 23:44:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:44:46,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:46,238 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:46,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:44:46,238 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash 94662732, now seen corresponding path program 19 times [2021-05-02 23:44:46,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:46,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876038693] [2021-05-02 23:44:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:46,249 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_231 0)) InVars {main_~x~0=v_main_~x~0_231} OutVars{main_~x~0=v_main_~x~0_231} AuxVars[] AssignedVars[] [2021-05-02 23:44:46,253 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:46,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:46,282 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:46,299 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:46,326 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:46,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:47,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:48,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:48,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:48,699 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876038693] [2021-05-02 23:44:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876038693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:48,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:48,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:44:48,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788241731] [2021-05-02 23:44:48,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:44:48,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:44:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:44:48,700 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:52,272 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2021-05-02 23:44:52,536 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 82 [2021-05-02 23:44:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:52,597 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-02 23:44:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:44:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:44:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:52,598 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:44:52,598 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:44:52,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 5055.5ms TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:44:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:44:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 23:44:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 23:44:52,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-02 23:44:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:52,618 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 23:44:52,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 23:44:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:44:52,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:52,619 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:52,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:44:52,620 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash 164635378, now seen corresponding path program 20 times [2021-05-02 23:44:52,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:52,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197327944] [2021-05-02 23:44:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:52,632 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_253 0)) InVars {main_~x~0=v_main_~x~0_253} OutVars{main_~x~0=v_main_~x~0_253} AuxVars[] AssignedVars[] [2021-05-02 23:44:52,635 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:52,636 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:52,642 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:52,688 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:52,719 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:52,947 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-02 23:44:53,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:53,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:53,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:54,798 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197327944] [2021-05-02 23:44:54,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [197327944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:54,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:54,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:44:54,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013794323] [2021-05-02 23:44:54,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:44:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:54,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:44:54,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:44:54,800 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:57,352 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-02 23:44:57,574 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 63 [2021-05-02 23:44:57,804 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 68 [2021-05-02 23:44:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:57,933 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:44:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:44:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 23:44:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:57,935 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:44:57,935 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:44:57,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4268.4ms TimeCoverageRelationStatistics Valid=291, Invalid=2901, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:44:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:44:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 23:44:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-02 23:44:57,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-02 23:44:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:57,954 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-02 23:44:57,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-02 23:44:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:44:57,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:57,955 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:57,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:44:57,955 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:57,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1961179892, now seen corresponding path program 21 times [2021-05-02 23:44:57,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:57,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155095739] [2021-05-02 23:44:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:57,967 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_276 0)) InVars {main_~x~0=v_main_~x~0_276} OutVars{main_~x~0=v_main_~x~0_276} AuxVars[] AssignedVars[] [2021-05-02 23:44:57,970 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:44:57,972 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:57,978 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:44:58,022 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:44:58,053 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:58,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:58,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:59,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:00,638 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155095739] [2021-05-02 23:45:00,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [155095739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:00,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:00,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:45:00,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729939408] [2021-05-02 23:45:00,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:45:00,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:45:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:45:00,639 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:03,822 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:45:04,513 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:45:04,862 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 73 [2021-05-02 23:45:05,196 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 78 [2021-05-02 23:45:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:05,446 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-02 23:45:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:45:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:45:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:05,452 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:45:05,454 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:45:05,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 5699.4ms TimeCoverageRelationStatistics Valid=182, Invalid=3010, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:45:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:45:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 23:45:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 23:45:05,500 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-02 23:45:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:05,500 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 23:45:05,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 23:45:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:45:05,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:05,501 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:05,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:45:05,501 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:05,502 INFO L82 PathProgramCache]: Analyzing trace with hash 858023474, now seen corresponding path program 22 times [2021-05-02 23:45:05,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:05,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495416090] [2021-05-02 23:45:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:05,516 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_300 0)) InVars {main_~x~0=v_main_~x~0_300} OutVars{main_~x~0=v_main_~x~0_300} AuxVars[] AssignedVars[] [2021-05-02 23:45:05,520 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:45:05,523 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:05,530 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:45:05,579 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:45:05,612 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:05,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:05,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:07,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:07,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:07,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:08,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:08,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:08,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:08,762 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495416090] [2021-05-02 23:45:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [495416090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:08,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:08,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:45:08,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691717900] [2021-05-02 23:45:08,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:45:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:45:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=925, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:45:08,764 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:12,491 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:45:12,954 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:45:13,187 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:45:13,560 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 73 [2021-05-02 23:45:13,892 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 78 [2021-05-02 23:45:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:14,147 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:45:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:45:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 23:45:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:14,149 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:45:14,149 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:45:14,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 6584.2ms TimeCoverageRelationStatistics Valid=190, Invalid=3232, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:45:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:45:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 23:45:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-02 23:45:14,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-02 23:45:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:14,171 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-02 23:45:14,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-02 23:45:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:45:14,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:14,172 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:14,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:45:14,172 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1940985396, now seen corresponding path program 23 times [2021-05-02 23:45:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:14,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259311318] [2021-05-02 23:45:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:14,183 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_325 0)) InVars {main_~x~0=v_main_~x~0_325} OutVars{main_~x~0=v_main_~x~0_325} AuxVars[] AssignedVars[] [2021-05-02 23:45:14,187 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:45:14,217 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:14,224 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:45:14,245 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:45:14,274 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:14,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:14,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:14,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:15,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:16,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:16,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:16,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:17,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:17,245 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-02 23:45:17,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:17,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:17,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:18,128 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:18,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259311318] [2021-05-02 23:45:18,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259311318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:18,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:18,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:45:18,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150758639] [2021-05-02 23:45:18,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:45:18,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:45:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:45:18,129 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:19,279 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-05-02 23:45:19,537 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-05-02 23:45:19,913 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-05-02 23:45:20,230 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-05-02 23:45:20,594 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-05-02 23:45:20,932 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-05-02 23:45:21,255 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-05-02 23:45:21,528 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-05-02 23:45:21,882 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-05-02 23:45:22,360 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-05-02 23:45:22,810 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-05-02 23:45:23,130 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 110 [2021-05-02 23:45:23,464 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2021-05-02 23:45:23,891 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 118 [2021-05-02 23:45:24,244 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2021-05-02 23:45:24,692 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2021-05-02 23:45:25,053 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-05-02 23:45:25,573 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2021-05-02 23:45:25,974 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-05-02 23:45:26,413 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-05-02 23:45:26,870 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2021-05-02 23:45:27,305 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 78 [2021-05-02 23:45:27,654 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 82 [2021-05-02 23:45:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:27,961 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-02 23:45:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:45:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 23:45:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:27,962 INFO L225 Difference]: With dead ends: 45 [2021-05-02 23:45:27,962 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:45:27,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 11302.0ms TimeCoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:45:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:45:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 23:45:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 23:45:27,985 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-02 23:45:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:27,985 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 23:45:27,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 23:45:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:45:27,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:27,985 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:27,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:45:27,986 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:27,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1484052850, now seen corresponding path program 24 times [2021-05-02 23:45:27,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:27,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657502715] [2021-05-02 23:45:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:28,004 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_351 0)) InVars {main_~x~0=v_main_~x~0_351} OutVars{main_~x~0=v_main_~x~0_351} AuxVars[] AssignedVars[] [2021-05-02 23:45:28,007 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:45:28,032 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:28,037 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:45:28,055 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:45:28,081 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:28,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:28,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:31,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:31,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:31,965 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:45:31,967 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:31,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657502715] [2021-05-02 23:45:31,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [657502715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:31,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:31,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:45:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935898171] [2021-05-02 23:45:31,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:45:31,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:31,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:45:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:45:31,969 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:36,155 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:45:36,438 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:45:36,720 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:45:37,000 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:45:37,321 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:45:37,645 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:45:37,981 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:45:38,527 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 77 [2021-05-02 23:45:38,975 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 82 [2021-05-02 23:45:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:39,191 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:45:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:45:39,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 23:45:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:39,193 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:45:39,193 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:45:39,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 8610.2ms TimeCoverageRelationStatistics Valid=250, Invalid=3656, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:45:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:45:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 23:45:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-02 23:45:39,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-02 23:45:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:39,224 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-02 23:45:39,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-02 23:45:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:45:39,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:39,225 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:39,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:45:39,225 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 286056076, now seen corresponding path program 25 times [2021-05-02 23:45:39,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:39,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234263125] [2021-05-02 23:45:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:39,235 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_378 0)) InVars {main_~x~0=v_main_~x~0_378} OutVars{main_~x~0=v_main_~x~0_378} AuxVars[] AssignedVars[] [2021-05-02 23:45:39,239 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:45:39,241 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:39,249 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:45:39,292 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:45:39,323 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:39,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:39,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:39,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:39,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:41,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:41,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:41,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:41,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:42,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:42,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:43,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:43,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:43,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:43,985 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:45:43,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:44,324 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:45:44,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:44,691 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:45:44,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:45,078 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:45:45,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234263125] [2021-05-02 23:45:45,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [234263125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:45,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:45,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:45:45,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071342712] [2021-05-02 23:45:45,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:45:45,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:45,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:45:45,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:45:45,082 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:48,383 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-02 23:45:49,293 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:45:49,638 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:45:49,968 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:45:50,291 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:45:50,693 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:45:51,056 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:45:51,465 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:45:51,873 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:45:52,280 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:45:52,671 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:45:53,058 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-02 23:45:53,444 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-05-02 23:45:54,004 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 79 [2021-05-02 23:45:54,455 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 83 [2021-05-02 23:45:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:54,713 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-02 23:45:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:45:54,714 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:45:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:54,715 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:45:54,715 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:45:54,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 12210.2ms TimeCoverageRelationStatistics Valid=258, Invalid=3902, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:45:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:45:54,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 23:45:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 23:45:54,740 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-02 23:45:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:54,740 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 23:45:54,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 23:45:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:45:54,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:54,740 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:54,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:45:54,740 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1802861746, now seen corresponding path program 26 times [2021-05-02 23:45:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:54,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034796760] [2021-05-02 23:45:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:54,764 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_406 0)) InVars {main_~x~0=v_main_~x~0_406} OutVars{main_~x~0=v_main_~x~0_406} AuxVars[] AssignedVars[] [2021-05-02 23:45:54,771 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:45:54,802 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:54,812 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:45:54,834 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:45:54,868 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:55,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:55,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:56,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:56,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:56,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:56,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:56,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:57,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:57,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:57,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:58,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:58,481 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-02 23:45:58,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:58,793 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:45:58,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:59,139 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:45:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:59,509 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:45:59,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:59,907 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:45:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:00,328 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:46:00,331 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:00,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034796760] [2021-05-02 23:46:00,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034796760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:00,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:00,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:46:00,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933387310] [2021-05-02 23:46:00,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:46:00,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:46:00,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:46:00,333 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,946 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-02 23:46:05,292 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:46:05,656 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:46:06,025 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:46:06,368 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:46:06,745 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:46:07,144 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:46:07,514 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:46:07,904 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:46:08,303 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:46:08,703 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:46:09,110 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-02 23:46:09,732 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 78 [2021-05-02 23:46:10,283 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 83 [2021-05-02 23:46:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:10,574 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:46:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:46:10,576 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 23:46:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:10,577 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:46:10,577 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:46:10,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 12230.4ms TimeCoverageRelationStatistics Valid=265, Invalid=4157, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:46:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:46:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 23:46:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-02 23:46:10,602 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-02 23:46:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:10,602 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-02 23:46:10,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-02 23:46:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:46:10,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:10,602 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:10,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:46:10,603 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1579197260, now seen corresponding path program 27 times [2021-05-02 23:46:10,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:10,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200950876] [2021-05-02 23:46:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:10,615 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_435 0)) InVars {main_~x~0=v_main_~x~0_435} OutVars{main_~x~0=v_main_~x~0_435} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,626 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:46:10,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,661 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:46:10,680 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:46:10,710 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:11,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:11,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:12,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:12,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:12,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:12,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:13,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:13,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:13,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:13,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:14,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:14,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:14,660 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-02 23:46:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:14,991 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-02 23:46:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:15,348 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:46:15,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:15,720 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:46:15,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:16,117 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:46:16,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:16,542 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:46:16,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:17,065 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:46:17,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:17,524 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:46:17,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:17,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200950876] [2021-05-02 23:46:17,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200950876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:17,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:17,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:46:17,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631031097] [2021-05-02 23:46:17,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:46:17,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:17,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:46:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:46:17,528 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:21,394 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-02 23:46:21,729 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-02 23:46:22,408 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-02 23:46:22,773 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:46:23,131 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:46:23,496 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:46:23,912 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:46:24,300 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:46:24,706 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:46:25,133 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:46:25,552 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:46:25,985 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:46:26,449 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:46:26,926 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-02 23:46:27,430 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-05-02 23:46:28,070 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 78 [2021-05-02 23:46:28,626 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 83 [2021-05-02 23:46:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:28,765 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-02 23:46:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:46:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 23:46:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:28,767 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:46:28,767 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:46:28,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 14708.2ms TimeCoverageRelationStatistics Valid=369, Invalid=4601, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:46:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:46:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 23:46:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 23:46:28,793 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-02 23:46:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:28,793 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 23:46:28,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 23:46:28,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:46:28,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:28,793 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:28,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:46:28,797 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1059434510, now seen corresponding path program 28 times [2021-05-02 23:46:28,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:28,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433636626] [2021-05-02 23:46:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:28,819 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_465 0)) InVars {main_~x~0=v_main_~x~0_465} OutVars{main_~x~0=v_main_~x~0_465} AuxVars[] AssignedVars[] [2021-05-02 23:46:28,823 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:46:28,825 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:28,835 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:46:28,903 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:46:28,955 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:29,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:29,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:30,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:30,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:30,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:30,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:31,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:31,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:31,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:31,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:32,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:32,506 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:46:32,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:32,854 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:46:32,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:33,205 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:46:33,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:33,581 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:46:33,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:33,982 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:46:33,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:34,442 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:46:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:34,946 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:46:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:35,476 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:46:35,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:36,020 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:46:36,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:36,555 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:46:36,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:36,980 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:46:36,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:37,353 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:46:37,355 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:37,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433636626] [2021-05-02 23:46:37,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433636626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:37,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:37,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:46:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123296] [2021-05-02 23:46:37,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:46:37,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:46:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:46:37,356 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:39,614 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:46:41,438 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:46:41,733 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:46:42,037 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:46:42,374 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:46:42,695 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:46:42,998 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:46:43,325 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:46:43,679 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:46:44,034 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:46:44,402 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:46:44,770 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:46:45,123 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:46:45,513 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:46:45,936 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:46:46,462 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 78 [2021-05-02 23:46:46,929 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 83 [2021-05-02 23:46:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:47,160 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:46:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:46:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:46:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:47,162 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:46:47,162 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:46:47,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 15176.4ms TimeCoverageRelationStatistics Valid=282, Invalid=4688, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:46:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:46:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 23:46:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-02 23:46:47,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-02 23:46:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:47,188 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-02 23:46:47,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-02 23:46:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:46:47,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:47,189 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:47,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:46:47,189 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:47,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1252640756, now seen corresponding path program 29 times [2021-05-02 23:46:47,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:47,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037212591] [2021-05-02 23:46:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:47,199 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_496 0)) InVars {main_~x~0=v_main_~x~0_496} OutVars{main_~x~0=v_main_~x~0_496} AuxVars[] AssignedVars[] [2021-05-02 23:46:47,201 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:46:47,203 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:47,208 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:46:47,245 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:46:47,272 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:47,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:50,259 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-02 23:46:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:50,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:50,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:51,422 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:46:51,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:51,746 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:46:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:52,180 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:46:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:52,527 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:46:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:52,882 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:46:52,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:53,247 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:46:53,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:53,639 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:46:53,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:54,080 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:46:54,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:54,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037212591] [2021-05-02 23:46:54,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037212591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:54,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:54,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:46:54,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348427293] [2021-05-02 23:46:54,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:46:54,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:54,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:46:54,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:46:54,083 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:58,712 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:46:59,012 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:46:59,326 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:46:59,644 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:47:00,005 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:47:00,340 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:47:00,678 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:47:01,013 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:47:01,361 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-02 23:47:01,694 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-05-02 23:47:02,108 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-05-02 23:47:02,500 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-05-02 23:47:02,905 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-05-02 23:47:03,304 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-05-02 23:47:03,792 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 78 [2021-05-02 23:47:04,235 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 83 [2021-05-02 23:47:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:04,410 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-02 23:47:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:47:04,411 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 23:47:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:04,411 INFO L225 Difference]: With dead ends: 51 [2021-05-02 23:47:04,411 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:47:04,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 14264.7ms TimeCoverageRelationStatistics Valid=390, Invalid=5160, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:47:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:47:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 23:47:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 23:47:04,445 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-02 23:47:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:04,446 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 23:47:04,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 23:47:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:47:04,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:04,446 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:04,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:47:04,446 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:04,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1347900210, now seen corresponding path program 30 times [2021-05-02 23:47:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:04,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516730124] [2021-05-02 23:47:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:04,454 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_528 0)) InVars {main_~x~0=v_main_~x~0_528} OutVars{main_~x~0=v_main_~x~0_528} AuxVars[] AssignedVars[] [2021-05-02 23:47:04,456 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:47:04,457 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:04,464 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:47:04,513 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:47:04,551 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:04,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:04,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:06,979 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:47:07,202 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-02 23:47:07,391 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-02 23:47:07,585 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:47:07,781 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:47:07,997 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:47:08,223 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-02 23:47:08,464 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:47:08,728 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:47:08,730 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:08,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516730124] [2021-05-02 23:47:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [516730124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:08,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:47:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973633307] [2021-05-02 23:47:08,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:47:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:47:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:47:08,732 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:11,742 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:47:11,957 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:47:12,211 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:47:12,438 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-02 23:47:12,662 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:47:12,905 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:47:13,175 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-05-02 23:47:13,423 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-02 23:47:13,686 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:47:13,985 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:47:14,263 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-02 23:47:14,552 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:47:14,858 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:47:15,194 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:47:15,566 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 59 [2021-05-02 23:47:15,862 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 64 [2021-05-02 23:47:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:15,958 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:47:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:47:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 23:47:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:15,960 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:47:15,960 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:47:15,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 9469.0ms TimeCoverageRelationStatistics Valid=342, Invalid=5510, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:47:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:47:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 23:47:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-02 23:47:15,986 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-02 23:47:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:15,986 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-02 23:47:15,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-02 23:47:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:47:15,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:15,987 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:15,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:47:15,987 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash 360291532, now seen corresponding path program 31 times [2021-05-02 23:47:15,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:15,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694962185] [2021-05-02 23:47:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:15,994 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_561 0)) InVars {main_~x~0=v_main_~x~0_561} OutVars{main_~x~0=v_main_~x~0_561} AuxVars[] AssignedVars[] [2021-05-02 23:47:15,999 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:47:16,000 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:16,006 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:47:16,045 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:47:16,080 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:16,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:16,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:16,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:17,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:18,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:18,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:18,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:18,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:19,263 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:47:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:19,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:19,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:20,104 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:47:20,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:20,452 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:47:20,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:20,818 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:47:20,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:21,202 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:47:21,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:21,581 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:47:21,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:21,990 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:47:21,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:22,452 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:47:22,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:22,874 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:47:22,876 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:22,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694962185] [2021-05-02 23:47:22,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [694962185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:22,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:22,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:47:22,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869800858] [2021-05-02 23:47:22,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:47:22,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:22,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:47:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:47:22,877 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:27,201 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:47:27,526 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:47:27,855 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:47:28,205 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:47:28,551 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:47:28,955 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:47:29,320 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:47:29,693 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:47:30,041 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:47:30,399 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:47:30,750 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:47:31,117 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:47:31,530 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:47:31,940 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:47:32,371 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:47:32,792 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:47:33,237 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:47:33,753 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:47:34,526 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 77 [2021-05-02 23:47:35,212 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 82 [2021-05-02 23:47:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:35,548 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-02 23:47:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:47:35,550 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:47:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:35,551 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:47:35,551 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:47:35,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 15636.5ms TimeCoverageRelationStatistics Valid=305, Invalid=5547, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:47:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:47:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 23:47:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 23:47:35,581 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-02 23:47:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:35,581 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 23:47:35,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 23:47:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:47:35,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:35,582 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:35,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:47:35,582 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:35,582 INFO L82 PathProgramCache]: Analyzing trace with hash -190806414, now seen corresponding path program 32 times [2021-05-02 23:47:35,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:35,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848958539] [2021-05-02 23:47:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:35,593 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_595 0)) InVars {main_~x~0=v_main_~x~0_595} OutVars{main_~x~0=v_main_~x~0_595} AuxVars[] AssignedVars[] [2021-05-02 23:47:35,598 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:47:35,600 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:35,610 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:47:35,670 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:47:35,721 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:35,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:35,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:37,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:37,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:37,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:37,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:37,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:38,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:38,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:38,662 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:47:38,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:38,924 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:47:38,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:39,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:39,448 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:47:39,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:39,742 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:47:39,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:40,086 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:47:40,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:40,433 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:47:40,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:40,782 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:47:40,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:41,152 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:47:41,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:41,561 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:47:41,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:41,971 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:47:41,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:42,410 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:47:42,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:42,875 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:47:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:43,391 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:47:43,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:43,917 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:47:43,919 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:43,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848958539] [2021-05-02 23:47:43,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [848958539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:43,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:43,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:47:43,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895780100] [2021-05-02 23:47:43,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:47:43,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:47:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:47:43,921 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:47,202 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:47:47,551 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-02 23:47:47,908 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:47:48,292 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:47:48,668 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:47:49,042 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:47:49,404 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:47:49,741 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:47:50,115 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:47:50,515 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:47:50,887 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:47:51,279 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:47:51,706 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:47:52,113 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:47:52,553 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:47:52,982 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:47:53,413 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:47:53,913 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:47:54,405 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:47:54,888 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:47:55,341 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:47:55,914 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:47:56,487 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:47:57,089 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-05-02 23:47:57,881 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 77 [2021-05-02 23:47:58,563 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 81 [2021-05-02 23:47:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:58,934 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:47:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:47:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 23:47:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:58,937 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:47:58,937 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 23:47:58,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 18784.9ms TimeCoverageRelationStatistics Valid=314, Invalid=5848, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:47:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 23:47:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 23:47:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-02 23:47:58,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-02 23:47:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:58,968 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-02 23:47:58,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-02 23:47:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:47:58,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:58,968 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:58,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:47:58,969 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -94973556, now seen corresponding path program 33 times [2021-05-02 23:47:58,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:58,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560613193] [2021-05-02 23:47:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:58,978 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_630 0)) InVars {main_~x~0=v_main_~x~0_630} OutVars{main_~x~0=v_main_~x~0_630} AuxVars[] AssignedVars[] [2021-05-02 23:47:58,993 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:47:58,995 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:59,004 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:47:59,060 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:47:59,117 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:59,416 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-02 23:47:59,626 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-02 23:47:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:59,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:59,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:59,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:01,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:01,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:01,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:01,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:01,942 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:48:01,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:02,216 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:48:02,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:02,497 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:48:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:02,792 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:48:02,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:03,113 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:48:03,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:03,454 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:48:03,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:03,821 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:48:03,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:04,195 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:48:04,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:04,616 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:48:04,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:05,029 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:48:05,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:05,510 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:48:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:05,996 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:48:06,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:06,490 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:48:06,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:06,993 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:48:07,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:07,480 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:48:07,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:08,022 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:48:08,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:08,651 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:48:08,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:09,242 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:48:09,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560613193] [2021-05-02 23:48:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [560613193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:09,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:09,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:48:09,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753803397] [2021-05-02 23:48:09,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:48:09,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:48:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:48:09,246 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:12,235 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:48:12,673 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:48:13,089 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:48:13,491 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:48:13,896 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:48:14,277 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:48:14,717 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:48:15,179 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:48:15,650 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:48:16,129 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:48:16,638 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:48:17,156 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:48:17,708 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:48:18,233 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:48:18,771 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:48:19,301 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:48:19,847 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:48:20,453 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:48:20,982 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:48:21,504 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:48:22,128 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:48:22,747 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-02 23:48:23,430 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-02 23:48:24,101 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-02 23:48:24,754 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-05-02 23:48:25,472 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-05-02 23:48:26,185 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2021-05-02 23:48:27,137 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2021-05-02 23:48:28,008 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2021-05-02 23:48:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:28,704 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-02 23:48:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:48:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 23:48:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:28,708 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:48:28,708 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:48:28,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 23917.9ms TimeCoverageRelationStatistics Valid=254, Invalid=6226, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:48:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:48:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 23:48:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 23:48:28,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-02 23:48:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:28,742 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 23:48:28,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 23:48:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:48:28,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:28,743 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:28,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:48:28,743 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1419122254, now seen corresponding path program 34 times [2021-05-02 23:48:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:28,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886205859] [2021-05-02 23:48:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:28,754 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_666 0)) InVars {main_~x~0=v_main_~x~0_666} OutVars{main_~x~0=v_main_~x~0_666} AuxVars[] AssignedVars[] [2021-05-02 23:48:28,756 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:48:28,794 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:28,805 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:48:28,841 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:48:28,916 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:29,133 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 23:48:29,285 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-02 23:48:29,423 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2021-05-02 23:48:29,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:29,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:29,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:30,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:30,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:30,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:30,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:31,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:31,323 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 23:48:31,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:31,577 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:48:31,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:31,839 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-02 23:48:31,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:32,125 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-02 23:48:32,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:32,431 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-02 23:48:32,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:32,749 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-02 23:48:32,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:33,086 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:48:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:33,476 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-05-02 23:48:33,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:33,854 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-02 23:48:33,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:34,278 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-05-02 23:48:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:34,750 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-02 23:48:34,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:35,201 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-02 23:48:35,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:35,734 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-02 23:48:35,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:36,328 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-02 23:48:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:36,983 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-05-02 23:48:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:37,516 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-05-02 23:48:37,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:38,031 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-05-02 23:48:38,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:38,612 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-05-02 23:48:38,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:39,246 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-05-02 23:48:39,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:39,820 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-05-02 23:48:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:40,528 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-05-02 23:48:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:41,229 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-05-02 23:48:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:41,993 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-05-02 23:48:42,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:42,749 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-05-02 23:48:42,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:43,507 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-05-02 23:48:43,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:44,294 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-05-02 23:48:44,297 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:44,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886205859] [2021-05-02 23:48:44,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [886205859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:44,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:44,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:48:44,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579757068] [2021-05-02 23:48:44,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:48:44,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:48:44,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1887, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:48:44,299 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:45,661 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-02 23:48:46,176 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-05-02 23:48:46,746 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-05-02 23:48:47,245 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-05-02 23:48:47,870 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-05-02 23:48:48,543 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-05-02 23:48:49,297 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-05-02 23:48:50,066 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-05-02 23:48:50,890 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-05-02 23:48:51,698 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-05-02 23:48:52,597 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-05-02 23:48:53,568 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-05-02 23:48:54,553 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-05-02 23:48:55,414 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-05-02 23:48:56,310 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 110 [2021-05-02 23:48:57,155 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2021-05-02 23:48:58,365 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 118 [2021-05-02 23:48:59,265 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2021-05-02 23:49:00,454 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2021-05-02 23:49:01,339 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-05-02 23:49:02,642 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2021-05-02 23:49:03,651 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-05-02 23:49:04,686 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-05-02 23:49:05,861 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2021-05-02 23:49:06,999 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 150 [2021-05-02 23:49:08,022 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 154 [2021-05-02 23:49:09,227 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 158 [2021-05-02 23:49:10,387 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 162 [2021-05-02 23:49:11,361 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 166 [2021-05-02 23:49:12,503 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 170 [2021-05-02 23:49:13,663 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 174 [2021-05-02 23:49:15,059 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 178 [2021-05-02 23:49:16,628 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 188 DAG size of output: 182 [2021-05-02 23:49:18,046 WARN L205 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 186 [2021-05-02 23:49:19,525 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 190 [2021-05-02 23:49:20,787 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 78 [2021-05-02 23:49:21,763 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 82 [2021-05-02 23:49:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:22,663 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:49:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:49:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 23:49:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:22,669 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:49:22,669 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:49:22,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 46028.4ms TimeCoverageRelationStatistics Valid=342, Invalid=6798, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:49:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:49:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 23:49:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-02 23:49:22,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-02 23:49:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:22,719 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-02 23:49:22,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-02 23:49:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:49:22,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:22,720 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:22,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:49:22,720 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash 481941068, now seen corresponding path program 35 times [2021-05-02 23:49:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:22,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565162197] [2021-05-02 23:49:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:22,734 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_703 0)) InVars {main_~x~0=v_main_~x~0_703} OutVars{main_~x~0=v_main_~x~0_703} AuxVars[] AssignedVars[] [2021-05-02 23:49:22,737 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:49:22,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,806 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:49:22,856 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:49:22,944 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:23,237 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-05-02 23:49:23,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:23,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:23,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:23,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:23,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:23,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:24,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:24,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:24,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:24,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:25,133 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 23:49:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:25,409 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 23:49:25,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:25,690 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-02 23:49:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:26,007 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 23:49:26,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:26,357 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-02 23:49:26,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:26,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:26,912 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-05-02 23:49:26,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:27,322 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-02 23:49:27,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:27,745 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-02 23:49:27,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:28,242 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-02 23:49:28,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:28,697 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-02 23:49:28,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:29,187 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-02 23:49:29,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:29,695 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:49:29,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:30,221 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:49:30,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:30,772 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:49:30,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:31,358 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:49:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:31,962 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:49:31,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:32,642 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:49:32,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:33,309 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:49:33,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:33,915 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:49:33,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:34,610 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:49:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:35,374 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:49:35,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:36,228 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-02 23:49:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:37,016 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-05-02 23:49:37,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:37,897 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-05-02 23:49:37,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:38,811 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-05-02 23:49:38,815 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:38,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565162197] [2021-05-02 23:49:38,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565162197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:38,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:38,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:49:38,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231696149] [2021-05-02 23:49:38,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:49:38,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:49:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:49:38,817 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:42,181 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 23:49:42,695 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 23:49:43,180 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-02 23:49:43,706 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 23:49:44,184 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-02 23:49:44,811 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-05-02 23:49:45,431 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-05-02 23:49:46,031 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-02 23:49:46,624 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-02 23:49:47,210 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-02 23:49:47,744 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-02 23:49:48,369 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-02 23:49:49,047 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:49:49,774 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-02 23:49:50,406 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-02 23:49:51,135 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-02 23:49:51,946 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:49:52,861 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-02 23:49:53,617 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-02 23:49:54,400 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-02 23:49:55,229 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-05-02 23:49:56,038 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-02 23:49:56,919 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-02 23:49:57,823 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-05-02 23:49:58,719 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-05-02 23:49:59,466 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-05-02 23:50:00,336 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-05-02 23:50:01,178 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-05-02 23:50:02,062 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2021-05-02 23:50:03,295 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2021-05-02 23:50:04,459 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-05-02 23:50:05,549 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2021-05-02 23:50:06,918 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 73 [2021-05-02 23:50:08,098 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 78 [2021-05-02 23:50:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:08,706 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-02 23:50:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:50:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 23:50:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:08,711 INFO L225 Difference]: With dead ends: 57 [2021-05-02 23:50:08,711 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:50:08,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 37548.5ms TimeCoverageRelationStatistics Valid=387, Invalid=7095, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:50:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:50:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 23:50:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 23:50:08,762 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-02 23:50:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:08,763 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 23:50:08,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 23:50:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:50:08,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:08,763 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:08,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:50:08,763 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -714638094, now seen corresponding path program 36 times [2021-05-02 23:50:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:08,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424817577] [2021-05-02 23:50:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:08,780 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_741 0)) InVars {main_~x~0=v_main_~x~0_741} OutVars{main_~x~0=v_main_~x~0_741} AuxVars[] AssignedVars[] [2021-05-02 23:50:08,784 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:50:08,841 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:08,857 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:50:08,911 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:50:09,014 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 23:50:09,019 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:09,434 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 23:50:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:09,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:09,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:11,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:11,490 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 23:50:11,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:11,780 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 23:50:11,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:12,156 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:50:12,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:12,541 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:50:12,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:12,909 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:50:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:13,424 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:50:13,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:13,959 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:50:13,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:14,475 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:50:14,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:14,992 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:50:15,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:15,590 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:50:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:16,210 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:50:16,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:16,909 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:50:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:17,507 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:50:17,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:18,122 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:50:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:18,813 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:50:18,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:19,524 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:50:19,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:20,144 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:50:20,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:20,777 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:50:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:21,445 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:50:21,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:22,211 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:50:22,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:22,973 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:50:22,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:23,907 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:50:23,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:24,686 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:50:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:25,620 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:50:25,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:26,611 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:50:26,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:27,651 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-02 23:50:27,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:28,691 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-02 23:50:28,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:29,730 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-02 23:50:29,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:30,848 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-05-02 23:50:30,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:30,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424817577] [2021-05-02 23:50:30,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [424817577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:30,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:30,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:50:30,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895702286] [2021-05-02 23:50:30,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:50:30,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:30,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:50:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:50:30,854 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:32,784 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 23:50:33,344 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 23:50:34,000 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:50:34,805 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:50:35,519 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:50:36,252 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:50:37,038 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:50:37,807 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:50:38,653 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:50:39,375 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:50:40,132 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:50:40,907 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:50:41,619 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:50:42,424 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:50:43,232 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:50:43,978 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:50:44,713 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:50:45,533 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:50:46,470 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:50:47,272 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:50:48,185 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:50:49,135 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:50:50,044 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:50:51,027 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:50:51,952 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:50:52,967 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-02 23:50:53,959 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-02 23:50:54,932 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-02 23:50:55,972 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-05-02 23:50:57,020 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-05-02 23:50:58,085 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2021-05-02 23:50:59,198 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-05-02 23:51:00,459 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2021-05-02 23:51:01,538 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2021-05-02 23:51:02,659 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2021-05-02 23:51:04,160 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 76 [2021-05-02 23:51:05,430 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 81 [2021-05-02 23:51:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:06,252 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:51:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:51:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:51:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:06,258 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:51:06,258 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:51:06,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 47646.8ms TimeCoverageRelationStatistics Valid=344, Invalid=7138, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:51:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:51:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 23:51:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-02 23:51:06,316 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-02 23:51:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:06,316 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-02 23:51:06,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-02 23:51:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:51:06,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:06,316 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:06,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:51:06,317 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash 846113548, now seen corresponding path program 37 times [2021-05-02 23:51:06,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:06,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355711417] [2021-05-02 23:51:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:06,332 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_780 0)) InVars {main_~x~0=v_main_~x~0_780} OutVars{main_~x~0=v_main_~x~0_780} AuxVars[] AssignedVars[] [2021-05-02 23:51:06,335 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:51:06,388 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:06,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:51:06,455 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:51:06,560 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:06,867 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:51:07,165 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-05-02 23:51:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:07,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:07,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:07,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:07,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:07,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:08,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:08,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:08,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:08,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:09,316 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:51:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:09,645 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:51:09,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:10,034 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:51:10,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:10,409 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 23:51:10,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:10,771 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-02 23:51:10,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:11,180 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:51:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:11,599 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-02 23:51:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:12,016 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:51:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:12,478 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:51:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:12,950 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:51:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:13,441 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:51:13,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:14,069 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:51:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:14,773 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:51:14,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:15,442 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:51:15,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:16,119 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:51:16,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:16,890 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:51:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:17,620 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:51:17,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:18,408 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:51:18,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:19,345 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:51:19,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:20,181 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:51:20,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:21,027 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:51:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:21,890 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:51:21,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:22,820 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:51:22,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:23,821 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:51:23,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:24,891 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:51:24,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:25,960 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:51:25,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:27,238 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:51:27,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:28,549 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:51:28,556 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355711417] [2021-05-02 23:51:28,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355711417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:28,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:28,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:51:28,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506763446] [2021-05-02 23:51:28,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:51:28,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:51:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:51:28,557 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:31,855 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 23:51:32,566 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:51:33,343 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:51:34,087 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:51:34,902 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 23:51:35,714 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-02 23:51:36,499 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:51:37,280 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-02 23:51:38,066 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:51:38,871 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:51:39,685 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:51:40,570 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:51:41,528 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:51:42,376 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:51:43,215 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:51:44,079 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:51:44,933 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:51:45,868 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:51:46,720 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:51:47,575 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:51:48,479 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:51:49,352 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:51:50,282 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:51:51,153 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:51:52,066 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:51:53,210 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:51:54,141 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:51:55,168 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:51:56,277 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:51:57,279 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-05-02 23:51:58,458 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-05-02 23:51:59,600 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-05-02 23:52:00,750 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-05-02 23:52:02,083 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-05-02 23:52:03,438 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2021-05-02 23:52:05,173 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 77 [2021-05-02 23:52:06,539 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 82 [2021-05-02 23:52:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:07,360 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-02 23:52:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:52:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:52:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:07,368 INFO L225 Difference]: With dead ends: 59 [2021-05-02 23:52:07,368 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:52:07,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 49536.8ms TimeCoverageRelationStatistics Valid=354, Invalid=7478, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:52:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:52:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 23:52:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 23:52:07,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-02 23:52:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:07,425 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 23:52:07,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 23:52:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:52:07,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:07,426 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:07,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:52:07,426 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1984774194, now seen corresponding path program 38 times [2021-05-02 23:52:07,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:07,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544931134] [2021-05-02 23:52:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:07,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_820 0)) InVars {main_~x~0=v_main_~x~0_820} OutVars{main_~x~0=v_main_~x~0_820} AuxVars[] AssignedVars[] [2021-05-02 23:52:07,446 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:52:07,449 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:07,467 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:52:07,578 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:52:07,697 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:52:07,703 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:08,172 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-05-02 23:52:08,348 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-05-02 23:52:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:08,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:08,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:09,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:09,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:09,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:10,313 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:52:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:10,623 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 23:52:10,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:10,964 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 23:52:10,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:11,357 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:52:11,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:11,752 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:52:11,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:12,153 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:52:12,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:12,626 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:52:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:13,091 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:52:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:13,603 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:52:13,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:14,122 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:52:14,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:14,696 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:52:14,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:15,302 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:52:15,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:15,942 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:52:15,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:16,599 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:52:16,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:17,234 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:52:17,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:17,922 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:52:17,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:18,603 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:52:18,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:19,422 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:52:19,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:20,296 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:52:20,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:21,191 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:52:21,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:22,104 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:52:22,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:23,131 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:52:23,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:24,170 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:52:24,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:25,193 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:52:25,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:26,359 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:52:26,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:27,637 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:52:27,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:28,887 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-02 23:52:28,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:30,054 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-02 23:52:30,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:31,392 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-02 23:52:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:32,798 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-05-02 23:52:32,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:34,144 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-05-02 23:52:34,151 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:34,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544931134] [2021-05-02 23:52:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [544931134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:34,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:34,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:52:34,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144941075] [2021-05-02 23:52:34,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:52:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:52:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2251, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:52:34,152 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:35,147 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:52:36,618 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 23:52:37,707 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-02 23:52:38,747 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-05-02 23:52:39,851 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-05-02 23:52:40,963 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-02 23:52:42,528 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-05-02 23:52:43,740 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-02 23:52:45,174 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-05-02 23:52:46,722 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-05-02 23:52:48,203 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-05-02 23:52:49,744 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-05-02 23:52:51,288 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-05-02 23:52:52,869 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2021-05-02 23:52:54,493 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2021-05-02 23:52:56,300 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 109 DAG size of output: 106 [2021-05-02 23:52:57,565 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2021-05-02 23:52:59,121 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-05-02 23:53:00,758 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-05-02 23:53:02,948 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-05-02 23:53:04,705 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2021-05-02 23:53:06,464 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 133 DAG size of output: 130 [2021-05-02 23:53:08,051 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 134 [2021-05-02 23:53:09,850 WARN L205 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-05-02 23:53:11,765 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 145 DAG size of output: 142 [2021-05-02 23:53:13,276 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 146 [2021-05-02 23:53:15,597 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-05-02 23:53:17,888 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-05-02 23:53:19,786 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 161 DAG size of output: 158 [2021-05-02 23:53:21,389 WARN L205 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 162 [2021-05-02 23:53:23,406 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 169 DAG size of output: 166 [2021-05-02 23:53:25,268 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 173 DAG size of output: 170 [2021-05-02 23:53:27,056 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 177 DAG size of output: 174 [2021-05-02 23:53:30,065 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 181 DAG size of output: 178 [2021-05-02 23:53:32,327 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 185 DAG size of output: 182 [2021-05-02 23:53:35,034 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 189 DAG size of output: 186 [2021-05-02 23:53:37,683 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 193 DAG size of output: 190 [2021-05-02 23:53:40,201 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 197 DAG size of output: 194 [2021-05-02 23:53:43,925 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 201 DAG size of output: 198 [2021-05-02 23:53:46,714 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 205 DAG size of output: 202 [2021-05-02 23:53:48,876 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 73 [2021-05-02 23:53:50,689 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 78 [2021-05-02 23:53:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:52,084 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:53:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:53:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 23:53:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:52,094 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:53:52,094 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:53:52,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 89860.3ms TimeCoverageRelationStatistics Valid=374, Invalid=8182, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:53:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:53:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 23:53:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-02 23:53:52,137 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-02 23:53:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:52,137 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-02 23:53:52,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-02 23:53:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:53:52,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:52,137 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:52,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:53:52,138 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1371451444, now seen corresponding path program 39 times [2021-05-02 23:53:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:52,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831212427] [2021-05-02 23:53:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:52,165 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_861 0)) InVars {main_~x~0=v_main_~x~0_861} OutVars{main_~x~0=v_main_~x~0_861} AuxVars[] AssignedVars[] [2021-05-02 23:53:52,171 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:53:52,250 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:52,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:53:52,346 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:53:52,494 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:52,501 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:52,755 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-05-02 23:53:53,298 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-02 23:53:53,813 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-02 23:53:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:54,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:54,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:54,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:54,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:54,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:54,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:55,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:55,489 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:53:55,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:55,803 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 23:53:55,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:56,122 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:53:56,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:56,490 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 23:53:56,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:56,860 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 23:53:56,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:57,273 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:53:57,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:57,713 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:53:57,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:58,193 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:53:58,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:58,710 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:53:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:59,255 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:53:59,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:59,870 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:53:59,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:00,537 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:54:00,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:01,211 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:54:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:01,884 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:54:01,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:02,608 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:54:02,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:03,402 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:54:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:04,239 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:54:04,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:05,122 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:54:05,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:06,097 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:54:06,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:07,145 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:54:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:08,164 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:54:08,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:09,254 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:54:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:10,436 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:54:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:11,551 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:54:11,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:12,804 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:54:12,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:14,003 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:54:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:15,151 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:54:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:16,489 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:54:16,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:17,896 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-02 23:54:17,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:19,282 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-02 23:54:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:20,583 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-02 23:54:20,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:22,172 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-05-02 23:54:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:23,658 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-05-02 23:54:23,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:25,265 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2021-05-02 23:54:25,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:25,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831212427] [2021-05-02 23:54:25,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831212427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:25,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:25,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:54:25,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305171302] [2021-05-02 23:54:25,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:54:25,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:25,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:54:25,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:54:25,274 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:26,723 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 23:54:27,521 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 23:54:28,473 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:54:29,403 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 23:54:30,354 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 23:54:31,337 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:54:32,287 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:54:33,317 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:54:34,279 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:54:35,238 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:54:36,317 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:54:37,418 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:54:38,441 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-02 23:54:39,482 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-02 23:54:40,523 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:54:41,576 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:54:42,803 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-02 23:54:43,948 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-02 23:54:45,092 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:54:46,212 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:54:47,408 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-02 23:54:48,635 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-02 23:54:49,972 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-02 23:54:51,290 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-02 23:54:52,696 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-02 23:54:53,966 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-02 23:54:55,303 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-05-02 23:54:56,634 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-05-02 23:54:58,036 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-02 23:54:59,509 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-02 23:55:01,082 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-02 23:55:02,761 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-05-02 23:55:04,308 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-05-02 23:55:06,219 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 183 [2021-05-02 23:55:07,976 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-05-02 23:55:09,797 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2021-05-02 23:55:11,323 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2021-05-02 23:55:13,283 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 199 [2021-05-02 23:55:15,156 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 203 [2021-05-02 23:55:17,288 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 207 [2021-05-02 23:55:19,557 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 237 DAG size of output: 73 [2021-05-02 23:55:21,632 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 237 DAG size of output: 78 [2021-05-02 23:55:22,827 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 23:55:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:23,434 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-02 23:55:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:55:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 23:55:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:23,444 INFO L225 Difference]: With dead ends: 61 [2021-05-02 23:55:23,444 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:55:23,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 75244.6ms TimeCoverageRelationStatistics Valid=290, Invalid=8266, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:55:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:55:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 23:55:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 23:55:23,489 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-02 23:55:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:23,489 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 23:55:23,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 23:55:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:55:23,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:23,490 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:23,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:55:23,490 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1959736178, now seen corresponding path program 40 times [2021-05-02 23:55:23,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:23,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772898546] [2021-05-02 23:55:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:23,512 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_903 0)) InVars {main_~x~0=v_main_~x~0_903} OutVars{main_~x~0=v_main_~x~0_903} AuxVars[] AssignedVars[] [2021-05-02 23:55:23,516 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:55:23,520 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:23,544 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:55:23,724 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:55:23,902 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:23,911 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:24,199 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 13 [2021-05-02 23:55:24,590 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-05-02 23:55:24,823 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 23:55:25,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:55:25,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:25,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:25,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:25,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:25,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:26,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:26,546 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:55:26,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:26,887 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:55:26,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:27,272 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:55:27,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:27,677 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:55:27,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:28,143 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 23:55:28,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:28,643 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:55:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:29,145 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:55:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:29,661 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:55:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:30,224 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 23:55:30,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:30,847 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-02 23:55:30,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:31,505 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:55:31,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:32,153 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-02 23:55:32,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:32,950 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:55:32,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:33,702 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:55:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:34,603 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:55:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:35,600 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:55:35,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:36,738 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:55:36,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:37,829 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:55:37,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:38,872 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:55:38,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:39,965 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:55:39,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:41,027 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:55:41,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:42,076 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:55:42,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:43,263 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:55:43,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:44,559 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:55:44,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:46,195 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:55:46,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:47,583 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:55:47,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:49,279 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:55:49,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:50,682 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:55:50,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:52,083 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:55:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:54,329 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:55:54,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:55,793 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:55:55,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:57,985 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:55:57,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:59,596 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:55:59,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:01,283 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-05-02 23:56:01,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:02,977 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-05-02 23:56:02,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:04,906 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 188 [2021-05-02 23:56:04,915 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772898546] [2021-05-02 23:56:04,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772898546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:04,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:04,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:56:04,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773264540] [2021-05-02 23:56:04,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:56:04,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:56:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:56:04,917 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:08,395 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 23:56:09,447 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:56:10,681 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:56:11,863 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 23:56:12,984 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:56:14,246 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:56:15,539 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:56:16,865 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 23:56:18,095 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-02 23:56:19,616 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:56:21,036 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-02 23:56:22,272 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:56:23,610 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:56:25,044 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:56:26,460 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:56:27,870 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:56:29,238 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:56:30,887 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:56:32,166 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:56:33,843 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:56:35,497 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:56:37,225 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:56:38,960 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:56:40,578 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:56:42,075 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:56:43,832 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:56:45,667 WARN L205 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:56:47,601 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-05-02 23:56:49,383 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:56:51,628 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 168 [2021-05-02 23:56:53,514 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-05-02 23:56:55,691 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 176 [2021-05-02 23:56:57,346 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-05-02 23:56:59,085 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-05-02 23:57:01,360 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 188 [2021-05-02 23:57:03,402 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 192 [2021-05-02 23:57:06,310 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 196 [2021-05-02 23:57:08,409 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 200 [2021-05-02 23:57:10,587 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 204 [2021-05-02 23:57:13,113 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 208 [2021-05-02 23:57:14,990 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 212 [2021-05-02 23:57:17,568 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 240 DAG size of output: 73 [2021-05-02 23:57:19,724 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 235 DAG size of output: 78 [2021-05-02 23:57:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:20,889 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:57:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:57:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 23:57:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:20,898 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:57:20,898 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:57:20,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 97727.9ms TimeCoverageRelationStatistics Valid=432, Invalid=8880, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:57:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:57:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 23:57:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-02 23:57:20,946 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-02 23:57:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:20,946 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-02 23:57:20,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-02 23:57:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:57:20,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:20,947 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:20,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:57:20,947 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2147337356, now seen corresponding path program 41 times [2021-05-02 23:57:20,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:20,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340527301] [2021-05-02 23:57:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:20,972 INFO L181 rdanLoopAcceleration]: Guard: Formula: (not (= v_main_~x~0_946 0)) InVars {main_~x~0=v_main_~x~0_946} OutVars{main_~x~0=v_main_~x~0_946} AuxVars[] AssignedVars[] [2021-05-02 23:57:20,976 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size [2021-05-02 23:57:20,983 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:21,009 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:57:21,196 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 84.6 percent of original size 66 [2021-05-02 23:57:21,383 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 23:57:21,392 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:22,434 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:57:22,693 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 23:57:23,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:57:23,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:23,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:23,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:24,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:24,323 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 23:57:24,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:24,677 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:57:24,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:25,076 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:57:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:25,505 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:57:25,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:25,884 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:57:25,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:26,383 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 23:57:26,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:26,869 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:57:26,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:27,395 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:57:27,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:27,927 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:57:27,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:28,499 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 23:57:28,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:29,131 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-02 23:57:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:29,834 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 23:57:29,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:30,505 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-02 23:57:30,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:31,288 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-02 23:57:31,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:32,204 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-02 23:57:32,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:33,051 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-02 23:57:33,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:33,926 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-02 23:57:33,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:34,920 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-02 23:57:34,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:35,979 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:57:35,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:37,000 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-02 23:57:37,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:38,126 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-02 23:57:38,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:39,509 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:57:39,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:41,019 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-02 23:57:41,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:42,290 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-02 23:57:42,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:43,892 WARN L205 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-02 23:57:43,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:45,128 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-02 23:57:45,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:46,412 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-02 23:57:46,423 WARN L159 QuantifierPusher]: Ignoring assumption.