/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/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:32:51,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:32:51,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:32:51,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:32:51,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:32:51,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:32:51,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:32:51,446 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 23:32:51,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:32:51,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:32:51,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:32:51,475 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:32:51,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:32:51,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:32:51,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:32:51,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:32:51,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:32:51,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:32:51,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:32:51,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:32:51,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:32:51,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:32:51,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:32:51,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:32:51,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:32:51,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:32:51,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:32:51,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:32:51,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:32:51,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:32:51,478 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:32:51,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:32:51,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:32:51,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:32:51,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:32:51,813 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:32:51,814 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:32:51,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2021-05-02 23:32:51,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3383fcc0a/6cca21c8b7ce42238b55c608b7f6251c/FLAGc328b26fd [2021-05-02 23:32:52,335 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:32:52,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2021-05-02 23:32:52,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3383fcc0a/6cca21c8b7ce42238b55c608b7f6251c/FLAGc328b26fd [2021-05-02 23:32:52,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3383fcc0a/6cca21c8b7ce42238b55c608b7f6251c [2021-05-02 23:32:52,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:32:52,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:32:52,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:32:52,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:32:52,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:32:52,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:32:52" (1/1) ... [2021-05-02 23:32:52,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab68132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:52, skipping insertion in model container [2021-05-02 23:32:52,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:32:52" (1/1) ... [2021-05-02 23:32:52,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:32:52,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:32:53,005 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/cggmp2005_variant.i[895,908] [2021-05-02 23:32:53,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:32:53,026 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:32:53,079 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/cggmp2005_variant.i[895,908] [2021-05-02 23:32:53,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:32:53,100 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:32:53,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53 WrapperNode [2021-05-02 23:32:53,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:32:53,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:32:53,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:32:53,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:32:53,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (1/1) ... [2021-05-02 23:32:53,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:32:53,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:32:53,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:32:53,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:32:53,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (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 23:32:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:32:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:32:53,215 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:32:53,215 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:32:53,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:32:53,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:32:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:32:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:32:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:32:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:32:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:32:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:32:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:32:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:32:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:32:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:32:53,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:32:53,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:32:53,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:32:53,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:32:53,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:32:53,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:32:53,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:32:53,519 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:32:53,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:32:53 BoogieIcfgContainer [2021-05-02 23:32:53,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:32:53,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:32:53,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:32:53,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:32:53,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:32:52" (1/3) ... [2021-05-02 23:32:53,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72beac5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:32:53, skipping insertion in model container [2021-05-02 23:32:53,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:32:53" (2/3) ... [2021-05-02 23:32:53,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72beac5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:32:53, skipping insertion in model container [2021-05-02 23:32:53,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:32:53" (3/3) ... [2021-05-02 23:32:53,527 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2021-05-02 23:32:53,532 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:32:53,552 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:32:53,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:32:53,602 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:32:53,602 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:32:53,603 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:32:53,603 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:32:53,603 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:32:53,603 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:32:53,603 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:32:53,603 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:32:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:32:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:32:53,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:53,628 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:53,629 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 253912119, now seen corresponding path program 1 times [2021-05-02 23:32:53,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:53,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823894401] [2021-05-02 23:32:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:53,698 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:53,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:53,914 INFO 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 23:32:53,915 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823894401] [2021-05-02 23:32:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [823894401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:53,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:53,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:32:53,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901686140] [2021-05-02 23:32:53,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:32:53,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:32:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:32:53,933 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:32:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:54,038 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-02 23:32:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:32:54,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:32:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:54,043 INFO L225 Difference]: With dead ends: 33 [2021-05-02 23:32:54,044 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 23:32:54,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:32:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 23:32:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 23:32:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:32:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:32:54,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 23:32:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:54,076 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:32:54,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:32:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:32:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:32:54,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:54,077 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:54,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:32:54,078 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash -684163825, now seen corresponding path program 1 times [2021-05-02 23:32:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:54,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386833855] [2021-05-02 23:32:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:54,124 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_10) InVars {main_~mid~0=v_main_~mid~0_10} OutVars{main_~mid~0=v_main_~mid~0_10} AuxVars[] AssignedVars[] [2021-05-02 23:32:54,140 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:32:54,180 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:54,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:32:54,245 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:32:54,276 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:54,484 INFO 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 23:32:54,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:54,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:54,594 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:54,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386833855] [2021-05-02 23:32:54,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [386833855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:54,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:54,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:32:54,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918170446] [2021-05-02 23:32:54,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:32:54,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:54,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:32:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:32:54,599 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:32:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:54,945 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 23:32:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:32:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 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 13 [2021-05-02 23:32:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:54,947 INFO L225 Difference]: With dead ends: 20 [2021-05-02 23:32:54,947 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:32:54,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:32:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:32:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:32:54,956 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 23:32:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:32:54,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 23:32:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:54,957 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:32:54,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:32:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:32:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:32:54,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:54,958 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:54,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:32:54,958 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 300252983, now seen corresponding path program 2 times [2021-05-02 23:32:54,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:54,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631366849] [2021-05-02 23:32:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:54,969 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_14) InVars {main_~mid~0=v_main_~mid~0_14} OutVars{main_~mid~0=v_main_~mid~0_14} AuxVars[] AssignedVars[] [2021-05-02 23:32:54,975 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:32:54,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:55,004 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:32:55,022 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:32:55,044 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:55,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:55,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:55,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:55,289 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:55,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631366849] [2021-05-02 23:32:55,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [631366849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:55,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:55,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:32:55,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912695361] [2021-05-02 23:32:55,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:32:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:32:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:32:55,291 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 23:32:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:55,661 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 23:32:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:32:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 23:32:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:55,662 INFO L225 Difference]: With dead ends: 21 [2021-05-02 23:32:55,662 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:32:55,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:32:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:32:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 23:32:55,669 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 23:32:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:32:55,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 23:32:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:55,670 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:32:55,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 23:32:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:32:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:32:55,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:55,671 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:55,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:32:55,671 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 752402959, now seen corresponding path program 3 times [2021-05-02 23:32:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:55,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253189145] [2021-05-02 23:32:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:55,687 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_19) InVars {main_~mid~0=v_main_~mid~0_19} OutVars{main_~mid~0=v_main_~mid~0_19} AuxVars[] AssignedVars[] [2021-05-02 23:32:55,693 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:32:55,701 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:55,708 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:32:55,746 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:32:55,767 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:55,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:55,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:56,228 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253189145] [2021-05-02 23:32:56,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253189145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:56,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:56,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:32:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721183465] [2021-05-02 23:32:56,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:32:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:32:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2021-05-02 23:32:56,230 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 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 23:32:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:57,652 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:32:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:32:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 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 23:32:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:57,654 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:32:57,654 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:32:57,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=75, Invalid=342, Unknown=3, NotChecked=0, Total=420 [2021-05-02 23:32:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:32:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:32:57,659 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 23:32:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:32:57,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-02 23:32:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:57,660 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:32:57,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 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 23:32:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:32:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:32:57,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:57,660 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:57,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:32:57,661 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1884150327, now seen corresponding path program 4 times [2021-05-02 23:32:57,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:57,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213244115] [2021-05-02 23:32:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:57,669 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_25) InVars {main_~mid~0=v_main_~mid~0_25} OutVars{main_~mid~0=v_main_~mid~0_25} AuxVars[] AssignedVars[] [2021-05-02 23:32:57,673 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:32:57,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:57,684 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:32:57,719 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:32:57,736 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:57,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:57,836 INFO 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 23:32:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:58,157 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:58,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213244115] [2021-05-02 23:32:58,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [213244115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:58,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:58,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:32:58,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239831369] [2021-05-02 23:32:58,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:32:58,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:32:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-05-02 23:32:58,159 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:32:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:59,172 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 23:32:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:32:59,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:32:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:59,176 INFO L225 Difference]: With dead ends: 23 [2021-05-02 23:32:59,176 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:32:59,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=83, Invalid=421, Unknown=2, NotChecked=0, Total=506 [2021-05-02 23:32:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:32:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:32:59,181 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 23:32:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:32:59,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-02 23:32:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:59,182 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:32:59,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:32:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:32:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:32:59,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:59,183 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:59,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:32:59,183 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1686386929, now seen corresponding path program 5 times [2021-05-02 23:32:59,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:59,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140686167] [2021-05-02 23:32:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:59,190 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_32) InVars {main_~mid~0=v_main_~mid~0_32} OutVars{main_~mid~0=v_main_~mid~0_32} AuxVars[] AssignedVars[] [2021-05-02 23:32:59,193 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:32:59,194 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:32:59,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:32:59,239 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:32:59,256 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:32:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:59,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:59,355 INFO 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 23:32:59,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:59,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:59,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:32:59,593 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:59,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140686167] [2021-05-02 23:32:59,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [140686167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:59,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:59,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:32:59,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490053757] [2021-05-02 23:32:59,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:32:59,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:59,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:32:59,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:32:59,595 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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 23:33:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:00,129 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:33:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:33:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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 23:33:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:00,131 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:33:00,131 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:33:00,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:33:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:33:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 23:33:00,136 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 23:33:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 23:33:00,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-02 23:33:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:00,137 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 23:33:00,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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 23:33:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 23:33:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:33:00,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:00,138 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:00,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:33:00,138 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash -703892169, now seen corresponding path program 6 times [2021-05-02 23:33:00,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:00,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387235264] [2021-05-02 23:33:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:00,145 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_40) InVars {main_~mid~0=v_main_~mid~0_40} OutVars{main_~mid~0=v_main_~mid~0_40} AuxVars[] AssignedVars[] [2021-05-02 23:33:00,148 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:00,149 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:00,154 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:00,176 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:00,192 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:00,285 INFO 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 23:33:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:00,616 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:00,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387235264] [2021-05-02 23:33:00,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [387235264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:00,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:00,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:33:00,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533436945] [2021-05-02 23:33:00,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:33:00,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:33:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2021-05-02 23:33:00,620 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 23:33:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:01,120 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-02 23:33:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:33:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 23:33:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:01,121 INFO L225 Difference]: With dead ends: 25 [2021-05-02 23:33:01,121 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:33:01,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 710.5ms TimeCoverageRelationStatistics Valid=100, Invalid=601, Unknown=1, NotChecked=0, Total=702 [2021-05-02 23:33:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:33:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 23:33:01,126 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 23:33:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-02 23:33:01,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-02 23:33:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:01,127 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-02 23:33:01,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 23:33:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-02 23:33:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:33:01,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:01,128 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:01,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:33:01,129 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -311325681, now seen corresponding path program 7 times [2021-05-02 23:33:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:01,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030262441] [2021-05-02 23:33:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:01,136 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_49) InVars {main_~mid~0=v_main_~mid~0_49} OutVars{main_~mid~0=v_main_~mid~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:33:01,138 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:01,149 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:01,158 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:01,170 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:01,193 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:01,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:01,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:01,587 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:01,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030262441] [2021-05-02 23:33:01,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030262441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:01,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:01,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:33:01,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64932512] [2021-05-02 23:33:01,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:33:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:33:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:33:01,589 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 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 23:33:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:02,286 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:33:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:33:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 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 23:33:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:02,287 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:33:02,287 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:33:02,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 744.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:33:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:33:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 23:33:02,294 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 23:33:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 23:33:02,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-02 23:33:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:02,295 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 23:33:02,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 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 23:33:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 23:33:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:33:02,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:02,295 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:02,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:33:02,296 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1026666441, now seen corresponding path program 8 times [2021-05-02 23:33:02,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:02,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360454422] [2021-05-02 23:33:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:02,302 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_59) InVars {main_~mid~0=v_main_~mid~0_59} OutVars{main_~mid~0=v_main_~mid~0_59} AuxVars[] AssignedVars[] [2021-05-02 23:33:02,305 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:02,306 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:02,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:02,340 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:02,361 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:02,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:02,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:02,813 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:02,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360454422] [2021-05-02 23:33:02,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360454422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:02,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:02,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:33:02,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228091284] [2021-05-02 23:33:02,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:33:02,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:33:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:33:02,815 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 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 23:33:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:03,515 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-02 23:33:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:33:03,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 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 23:33:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:03,516 INFO L225 Difference]: With dead ends: 27 [2021-05-02 23:33:03,516 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:33:03,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 804.3ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:33:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:33:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 23:33:03,522 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 23:33:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 23:33:03,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-02 23:33:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:03,523 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 23:33:03,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 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 23:33:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 23:33:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:33:03,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:03,523 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:03,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:33:03,524 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:03,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1727393521, now seen corresponding path program 9 times [2021-05-02 23:33:03,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:03,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529844151] [2021-05-02 23:33:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:03,532 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_70) InVars {main_~mid~0=v_main_~mid~0_70} OutVars{main_~mid~0=v_main_~mid~0_70} AuxVars[] AssignedVars[] [2021-05-02 23:33:03,534 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:03,535 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:03,540 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:03,560 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:03,575 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:03,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:03,655 INFO 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 23:33:03,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:04,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:04,052 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:04,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529844151] [2021-05-02 23:33:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [529844151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:04,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:04,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:33:04,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751067350] [2021-05-02 23:33:04,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:33:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:33:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:33:04,054 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 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 23:33:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:04,934 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:33:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:33:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 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 23:33:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:04,935 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:33:04,936 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:33:04,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 957.0ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:33:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:33:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 23:33:04,943 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 23:33:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 23:33:04,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-02 23:33:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:04,945 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 23:33:04,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 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 23:33:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 23:33:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:33:04,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:04,946 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:04,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:33:04,946 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:04,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1975096521, now seen corresponding path program 10 times [2021-05-02 23:33:04,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:04,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859646806] [2021-05-02 23:33:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:04,958 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_82) InVars {main_~mid~0=v_main_~mid~0_82} OutVars{main_~mid~0=v_main_~mid~0_82} AuxVars[] AssignedVars[] [2021-05-02 23:33:04,963 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:04,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:04,980 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:04,995 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:05,013 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:05,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:05,115 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 23:33:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:05,557 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:05,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859646806] [2021-05-02 23:33:05,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [859646806] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:05,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:05,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:33:05,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780579874] [2021-05-02 23:33:05,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:33:05,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:05,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:33:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:33:05,559 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 23:33:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:06,513 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-02 23:33:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:33:06,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 23:33:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:06,514 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:33:06,514 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:33:06,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1065.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:33:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:33:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 23:33:06,521 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 23:33:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 23:33:06,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-02 23:33:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:06,522 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 23:33:06,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 23:33:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 23:33:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:33:06,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:06,522 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:06,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:33:06,523 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:06,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1063954929, now seen corresponding path program 11 times [2021-05-02 23:33:06,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:06,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164442024] [2021-05-02 23:33:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:06,529 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_95) InVars {main_~mid~0=v_main_~mid~0_95} OutVars{main_~mid~0=v_main_~mid~0_95} AuxVars[] AssignedVars[] [2021-05-02 23:33:06,531 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:06,542 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:06,547 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:06,559 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:06,576 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:06,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:06,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:07,087 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:07,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164442024] [2021-05-02 23:33:07,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164442024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:07,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:07,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:33:07,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525439735] [2021-05-02 23:33:07,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:33:07,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:33:07,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=364, Unknown=1, NotChecked=0, Total=420 [2021-05-02 23:33:07,089 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 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 23:33:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:07,780 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:33:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:33:07,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 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 23:33:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:07,782 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:33:07,782 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:33:07,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 942.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2021-05-02 23:33:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:33:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 23:33:07,788 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 23:33:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 23:33:07,789 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-02 23:33:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:07,789 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 23:33:07,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 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 23:33:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 23:33:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:33:07,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:07,790 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:07,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:33:07,790 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1411630647, now seen corresponding path program 12 times [2021-05-02 23:33:07,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:07,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787905757] [2021-05-02 23:33:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:07,795 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_109) InVars {main_~mid~0=v_main_~mid~0_109} OutVars{main_~mid~0=v_main_~mid~0_109} AuxVars[] AssignedVars[] [2021-05-02 23:33:07,797 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:07,807 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:07,812 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:07,830 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:07,851 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:07,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:07,945 INFO 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 23:33:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:07,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:07,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:08,497 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:08,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787905757] [2021-05-02 23:33:08,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787905757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:08,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:08,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:33:08,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776506840] [2021-05-02 23:33:08,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:33:08,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:08,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:33:08,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:33:08,499 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 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 23:33:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:09,551 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-02 23:33:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:33:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 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 23:33:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:09,553 INFO L225 Difference]: With dead ends: 31 [2021-05-02 23:33:09,553 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:33:09,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1207.6ms TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:33:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:33:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 23:33:09,562 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 23:33:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-02 23:33:09,563 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-02 23:33:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:09,563 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-02 23:33:09,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 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 23:33:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-02 23:33:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:33:09,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:09,564 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:09,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:33:09,564 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash 845372175, now seen corresponding path program 13 times [2021-05-02 23:33:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:09,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475139234] [2021-05-02 23:33:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:09,576 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_124) InVars {main_~mid~0=v_main_~mid~0_124} OutVars{main_~mid~0=v_main_~mid~0_124} AuxVars[] AssignedVars[] [2021-05-02 23:33:09,579 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:09,589 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:09,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:09,606 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:09,621 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:09,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:09,713 INFO 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 23:33:09,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:09,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:10,340 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:10,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475139234] [2021-05-02 23:33:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [475139234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:10,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:10,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:33:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439204607] [2021-05-02 23:33:10,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:33:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:10,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:33:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:33:10,341 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 19 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 23:33:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:11,592 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:33:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:33:11,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.05) internal successors, (21), 19 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 23:33:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:11,593 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:33:11,593 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:33:11,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1366.6ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:33:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:33:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 23:33:11,601 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 23:33:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 23:33:11,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-02 23:33:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:11,602 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 23:33:11,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.05) internal successors, (21), 19 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 23:33:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 23:33:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:33:11,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:11,603 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:11,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:33:11,603 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash 471228727, now seen corresponding path program 14 times [2021-05-02 23:33:11,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:11,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076529796] [2021-05-02 23:33:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:11,608 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_140) InVars {main_~mid~0=v_main_~mid~0_140} OutVars{main_~mid~0=v_main_~mid~0_140} AuxVars[] AssignedVars[] [2021-05-02 23:33:11,610 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:11,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:11,615 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:11,635 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:11,650 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:11,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:11,748 INFO 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 23:33:11,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:11,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:12,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:12,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076529796] [2021-05-02 23:33:12,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076529796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:12,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:12,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:33:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324778720] [2021-05-02 23:33:12,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:33:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:33:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:33:12,379 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 23:33:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:13,631 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-02 23:33:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:33:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 23:33:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:13,632 INFO L225 Difference]: With dead ends: 33 [2021-05-02 23:33:13,632 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:33:13,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1401.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:33:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:33:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 23:33:13,642 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 23:33:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 23:33:13,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-02 23:33:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:13,642 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 23:33:13,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 23:33:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 23:33:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:13,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:13,643 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:13,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:33:13,643 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683727, now seen corresponding path program 15 times [2021-05-02 23:33:13,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:13,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012926063] [2021-05-02 23:33:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:13,648 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_157) InVars {main_~mid~0=v_main_~mid~0_157} OutVars{main_~mid~0=v_main_~mid~0_157} AuxVars[] AssignedVars[] [2021-05-02 23:33:13,654 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:13,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:13,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:13,688 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:13,703 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:13,784 INFO 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 23:33:13,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:13,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:13,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:13,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:13,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:13,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:14,552 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:14,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012926063] [2021-05-02 23:33:14,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012926063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:14,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:14,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:33:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386821774] [2021-05-02 23:33:14,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:33:14,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:14,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:33:14,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:33:14,554 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 21 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 23:33:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:16,036 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:33:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:33:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 21 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 23:33:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:16,037 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:33:16,037 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:33:16,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1684.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:33:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:33:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 23:33:16,046 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 23:33:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 23:33:16,046 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-02 23:33:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:16,046 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 23:33:16,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 21 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 23:33:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 23:33:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:33:16,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:16,047 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:16,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:33:16,047 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:16,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1311884233, now seen corresponding path program 16 times [2021-05-02 23:33:16,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:16,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738150077] [2021-05-02 23:33:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:16,061 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_175) InVars {main_~mid~0=v_main_~mid~0_175} OutVars{main_~mid~0=v_main_~mid~0_175} AuxVars[] AssignedVars[] [2021-05-02 23:33:16,063 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:16,073 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:16,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:16,092 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:16,109 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:16,184 INFO 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 23:33:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:16,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:17,001 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738150077] [2021-05-02 23:33:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1738150077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:17,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:17,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:33:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130631238] [2021-05-02 23:33:17,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:33:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:33:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:33:17,002 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 22 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 23:33:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:18,602 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-02 23:33:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:33:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 22 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 23:33:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:18,603 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:33:18,603 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:33:18,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1844.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1982, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:33:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:33:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 23:33:18,613 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 23:33:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 23:33:18,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-02 23:33:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:18,614 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 23:33:18,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 22 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 23:33:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 23:33:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:33:18,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:18,614 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:18,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:33:18,614 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1979210481, now seen corresponding path program 17 times [2021-05-02 23:33:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586743369] [2021-05-02 23:33:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:18,621 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_194) InVars {main_~mid~0=v_main_~mid~0_194} OutVars{main_~mid~0=v_main_~mid~0_194} AuxVars[] AssignedVars[] [2021-05-02 23:33:18,624 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:18,625 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:18,630 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:18,664 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:18,680 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:18,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:18,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:18,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:18,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:18,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:19,666 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:19,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586743369] [2021-05-02 23:33:19,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [586743369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:19,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:19,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:33:19,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98155341] [2021-05-02 23:33:19,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:33:19,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:33:19,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:33:19,667 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 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 23:33:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:21,438 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:33:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:33:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 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 23:33:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:21,439 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:33:21,439 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:33:21,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2025.1ms TimeCoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:33:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:33:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 23:33:21,452 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 23:33:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 23:33:21,453 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-02 23:33:21,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:21,453 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 23:33:21,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 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 23:33:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 23:33:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:33:21,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:21,454 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:21,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:33:21,454 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:21,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1191487689, now seen corresponding path program 18 times [2021-05-02 23:33:21,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:21,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901124953] [2021-05-02 23:33:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:21,459 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_214) InVars {main_~mid~0=v_main_~mid~0_214} OutVars{main_~mid~0=v_main_~mid~0_214} AuxVars[] AssignedVars[] [2021-05-02 23:33:21,461 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:21,462 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:21,468 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:21,488 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:21,503 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:21,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:21,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,530 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:22,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901124953] [2021-05-02 23:33:22,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [901124953] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:22,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:22,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:33:22,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289631100] [2021-05-02 23:33:22,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:33:22,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:22,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:33:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:33:22,531 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 24 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 23:33:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:24,551 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-02 23:33:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:33:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 24 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 23:33:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:24,552 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:33:24,552 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:33:24,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2195.7ms TimeCoverageRelationStatistics Valid=196, Invalid=2354, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:33:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:33:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 23:33:24,569 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 23:33:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-02 23:33:24,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-02 23:33:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:24,570 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-02 23:33:24,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 24 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 23:33:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-02 23:33:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:33:24,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:24,570 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:24,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:33:24,571 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1753082383, now seen corresponding path program 19 times [2021-05-02 23:33:24,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:24,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111120957] [2021-05-02 23:33:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:24,579 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_235) InVars {main_~mid~0=v_main_~mid~0_235} OutVars{main_~mid~0=v_main_~mid~0_235} AuxVars[] AssignedVars[] [2021-05-02 23:33:24,581 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:24,582 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:24,588 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:24,612 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:24,632 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,728 INFO 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 23:33:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:25,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:25,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111120957] [2021-05-02 23:33:25,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111120957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:25,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:25,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:33:25,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624252782] [2021-05-02 23:33:25,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:33:25,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:33:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2021-05-02 23:33:25,492 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 25 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 23:33:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:27,165 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:33:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:33:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 25 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 23:33:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:27,166 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:33:27,166 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:33:27,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2049.4ms TimeCoverageRelationStatistics Valid=204, Invalid=2550, Unknown=2, NotChecked=0, Total=2756 [2021-05-02 23:33:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:33:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 23:33:27,178 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 23:33:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 23:33:27,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-02 23:33:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:27,178 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 23:33:27,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 25 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 23:33:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 23:33:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:33:27,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:27,179 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:27,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:33:27,179 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1454525897, now seen corresponding path program 20 times [2021-05-02 23:33:27,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:27,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662383136] [2021-05-02 23:33:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:27,194 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_257) InVars {main_~mid~0=v_main_~mid~0_257} OutVars{main_~mid~0=v_main_~mid~0_257} AuxVars[] AssignedVars[] [2021-05-02 23:33:27,197 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:27,207 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:27,213 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:27,225 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:27,240 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:27,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:28,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:28,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662383136] [2021-05-02 23:33:28,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662383136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:28,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:28,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:33:28,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044547284] [2021-05-02 23:33:28,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:33:28,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:28,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:33:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=787, Unknown=1, NotChecked=0, Total=870 [2021-05-02 23:33:28,137 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 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 23:33:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:29,643 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 23:33:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:33:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 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 23:33:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:29,644 INFO L225 Difference]: With dead ends: 39 [2021-05-02 23:33:29,644 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:33:29,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1963.9ms TimeCoverageRelationStatistics Valid=212, Invalid=2756, Unknown=2, NotChecked=0, Total=2970 [2021-05-02 23:33:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:33:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 23:33:29,678 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 23:33:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-02 23:33:29,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-02 23:33:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:29,678 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-02 23:33:29,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 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 23:33:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-02 23:33:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:33:29,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:29,679 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:29,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:33:29,679 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:29,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2106134769, now seen corresponding path program 21 times [2021-05-02 23:33:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:29,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349619078] [2021-05-02 23:33:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:29,687 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_280) InVars {main_~mid~0=v_main_~mid~0_280} OutVars{main_~mid~0=v_main_~mid~0_280} AuxVars[] AssignedVars[] [2021-05-02 23:33:29,691 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:29,692 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:29,697 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:29,720 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:29,739 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:29,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:29,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:29,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:29,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:29,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:29,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:29,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:31,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:31,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349619078] [2021-05-02 23:33:31,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [349619078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:31,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:31,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:33:31,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627633237] [2021-05-02 23:33:31,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:33:31,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:33:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:33:31,045 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 27 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 23:33:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:33,450 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:33:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:33:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 27 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 23:33:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:33,451 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:33:33,451 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:33:33,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2701.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2972, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:33:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:33:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 23:33:33,473 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 23:33:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 23:33:33,474 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-02 23:33:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:33,474 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 23:33:33,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 27 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 23:33:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 23:33:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:33:33,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:33,475 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:33,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:33:33,475 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash -831173321, now seen corresponding path program 22 times [2021-05-02 23:33:33,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:33,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832775850] [2021-05-02 23:33:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:33,481 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_304) InVars {main_~mid~0=v_main_~mid~0_304} OutVars{main_~mid~0=v_main_~mid~0_304} AuxVars[] AssignedVars[] [2021-05-02 23:33:33,482 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:33,492 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:33,497 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:33,508 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:33,523 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:33,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:33,605 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 23:33:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:34,496 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:34,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832775850] [2021-05-02 23:33:34,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [832775850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:34,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:34,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:33:34,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438350025] [2021-05-02 23:33:34,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:33:34,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:33:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=903, Unknown=1, NotChecked=0, Total=992 [2021-05-02 23:33:34,498 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 28 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 23:33:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:36,023 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-02 23:33:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:33:36,023 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 28 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 23:33:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:36,024 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:33:36,024 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:33:36,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1970.0ms TimeCoverageRelationStatistics Valid=228, Invalid=3193, Unknown=1, NotChecked=0, Total=3422 [2021-05-02 23:33:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:33:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 23:33:36,039 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 23:33:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-02 23:33:36,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-02 23:33:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:36,039 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-02 23:33:36,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 28 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 23:33:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-02 23:33:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:33:36,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:36,040 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:36,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:33:36,040 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash 37925903, now seen corresponding path program 23 times [2021-05-02 23:33:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217428343] [2021-05-02 23:33:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:36,054 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_329) InVars {main_~mid~0=v_main_~mid~0_329} OutVars{main_~mid~0=v_main_~mid~0_329} AuxVars[] AssignedVars[] [2021-05-02 23:33:36,056 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:36,056 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:36,062 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:36,084 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:36,103 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:36,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:36,183 INFO 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 23:33:36,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:36,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,486 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:37,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217428343] [2021-05-02 23:33:37,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [217428343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:37,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:37,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:33:37,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610736058] [2021-05-02 23:33:37,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:33:37,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:37,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:33:37,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:33:37,487 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 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 23:33:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:40,131 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:33:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:33:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 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 23:33:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:40,132 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:33:40,132 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:33:40,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2919.5ms TimeCoverageRelationStatistics Valid=236, Invalid=3424, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:33:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:33:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 23:33:40,147 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 23:33:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 23:33:40,148 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-02 23:33:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:40,148 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 23:33:40,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 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 23:33:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 23:33:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:33:40,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:40,149 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:40,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:33:40,149 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1210198071, now seen corresponding path program 24 times [2021-05-02 23:33:40,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:40,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583365966] [2021-05-02 23:33:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:40,166 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_355) InVars {main_~mid~0=v_main_~mid~0_355} OutVars{main_~mid~0=v_main_~mid~0_355} AuxVars[] AssignedVars[] [2021-05-02 23:33:40,169 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:40,169 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:40,175 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:40,196 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:40,212 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:40,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:40,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:41,666 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:41,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583365966] [2021-05-02 23:33:41,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583365966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:41,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:41,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:33:41,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771988059] [2021-05-02 23:33:41,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:33:41,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:41,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:33:41,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:33:41,668 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 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 23:33:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:44,482 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-02 23:33:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:33:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 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 23:33:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:44,483 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:33:44,483 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:33:44,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3101.2ms TimeCoverageRelationStatistics Valid=244, Invalid=3662, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:33:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:33:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 23:33:44,503 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 23:33:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-02 23:33:44,504 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-02 23:33:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:44,504 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-02 23:33:44,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 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 23:33:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-02 23:33:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:33:44,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:44,505 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:44,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:33:44,505 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1104070385, now seen corresponding path program 25 times [2021-05-02 23:33:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:44,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466498136] [2021-05-02 23:33:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:44,511 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_382) InVars {main_~mid~0=v_main_~mid~0_382} OutVars{main_~mid~0=v_main_~mid~0_382} AuxVars[] AssignedVars[] [2021-05-02 23:33:44,513 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:44,524 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:44,530 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:44,544 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:44,563 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:44,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:44,638 INFO 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 23:33:44,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:46,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:46,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:46,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466498136] [2021-05-02 23:33:46,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [466498136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:46,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:46,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:33:46,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802948119] [2021-05-02 23:33:46,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:33:46,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:33:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:33:46,220 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 31 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 23:33:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:49,601 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:33:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:33:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.03125) internal successors, (33), 31 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 23:33:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:49,602 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:33:49,602 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:33:49,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3603.0ms TimeCoverageRelationStatistics Valid=252, Invalid=3908, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:33:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:33:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 23:33:49,619 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 23:33:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 23:33:49,619 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-02 23:33:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:49,619 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 23:33:49,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.03125) internal successors, (33), 31 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 23:33:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 23:33:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:33:49,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:49,620 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:49,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:33:49,620 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:49,620 INFO L82 PathProgramCache]: Analyzing trace with hash 168051511, now seen corresponding path program 26 times [2021-05-02 23:33:49,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:49,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106901792] [2021-05-02 23:33:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:49,638 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_410) InVars {main_~mid~0=v_main_~mid~0_410} OutVars{main_~mid~0=v_main_~mid~0_410} AuxVars[] AssignedVars[] [2021-05-02 23:33:49,642 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:49,643 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:49,648 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:49,672 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:49,691 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:49,777 INFO 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 23:33:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:49,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:49,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:49,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:51,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:51,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:51,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:51,570 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:51,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106901792] [2021-05-02 23:33:51,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [106901792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:51,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:51,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:33:51,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093023268] [2021-05-02 23:33:51,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:33:51,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:33:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:33:51,571 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 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 23:33:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:55,404 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-02 23:33:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:33:55,405 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 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 23:33:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:55,405 INFO L225 Difference]: With dead ends: 45 [2021-05-02 23:33:55,405 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:33:55,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 4104.8ms TimeCoverageRelationStatistics Valid=260, Invalid=4162, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:33:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:33:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 23:33:55,423 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 23:33:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-02 23:33:55,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-02 23:33:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:55,424 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-02 23:33:55,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 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 23:33:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-02 23:33:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:33:55,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:55,425 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:55,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:33:55,425 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash 949124623, now seen corresponding path program 27 times [2021-05-02 23:33:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562919996] [2021-05-02 23:33:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:55,432 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_439) InVars {main_~mid~0=v_main_~mid~0_439} OutVars{main_~mid~0=v_main_~mid~0_439} AuxVars[] AssignedVars[] [2021-05-02 23:33:55,434 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:33:55,434 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:55,440 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:33:55,461 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:33:55,479 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:55,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:57,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562919996] [2021-05-02 23:33:57,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [562919996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:57,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:57,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:33:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342148493] [2021-05-02 23:33:57,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:33:57,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:33:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:33:57,509 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 33 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 23:34:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:01,469 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:34:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:34:01,470 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 33 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 23:34:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:01,470 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:34:01,470 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:34:01,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4353.8ms TimeCoverageRelationStatistics Valid=268, Invalid=4424, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:34:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:34:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 23:34:01,489 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 23:34:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 23:34:01,489 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-02 23:34:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:01,489 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 23:34:01,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 33 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 23:34:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 23:34:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:34:01,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:01,490 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:01,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:34:01,490 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -607412681, now seen corresponding path program 28 times [2021-05-02 23:34:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:01,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606198959] [2021-05-02 23:34:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:01,504 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_469) InVars {main_~mid~0=v_main_~mid~0_469} OutVars{main_~mid~0=v_main_~mid~0_469} AuxVars[] AssignedVars[] [2021-05-02 23:34:01,507 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:01,508 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:01,514 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:01,542 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:01,567 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:01,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:01,661 INFO 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 23:34:01,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:03,788 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:03,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606198959] [2021-05-02 23:34:03,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [606198959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:03,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:03,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:34:03,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032818257] [2021-05-02 23:34:03,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:34:03,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:34:03,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:34:03,790 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 34 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 23:34:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:07,976 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-02 23:34:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:34:07,976 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 34 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 23:34:07,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:07,977 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:34:07,977 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:34:07,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 4643.8ms TimeCoverageRelationStatistics Valid=276, Invalid=4694, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:34:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:34:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 23:34:07,999 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 23:34:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-02 23:34:07,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-02 23:34:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:07,999 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-02 23:34:07,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 34 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 23:34:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-02 23:34:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:34:08,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:08,000 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:08,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:34:08,000 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:08,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1615428849, now seen corresponding path program 29 times [2021-05-02 23:34:08,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:08,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328627092] [2021-05-02 23:34:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:08,006 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_500) InVars {main_~mid~0=v_main_~mid~0_500} OutVars{main_~mid~0=v_main_~mid~0_500} AuxVars[] AssignedVars[] [2021-05-02 23:34:08,014 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:08,027 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:08,034 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:08,052 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:08,071 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:08,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:08,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:09,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:10,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:10,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:10,406 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328627092] [2021-05-02 23:34:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1328627092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:10,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:10,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:34:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089051740] [2021-05-02 23:34:10,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:34:10,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:34:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:34:10,407 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 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 23:34:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:14,919 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:34:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:34:14,919 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 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 23:34:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:14,920 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:34:14,920 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:34:14,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4909.1ms TimeCoverageRelationStatistics Valid=284, Invalid=4972, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:34:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:34:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 23:34:14,946 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 23:34:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 23:34:14,947 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-02 23:34:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:14,947 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 23:34:14,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 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 23:34:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 23:34:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:34:14,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:14,949 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:14,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:34:14,949 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1495808311, now seen corresponding path program 30 times [2021-05-02 23:34:14,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:14,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782739594] [2021-05-02 23:34:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:14,964 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_532) InVars {main_~mid~0=v_main_~mid~0_532} OutVars{main_~mid~0=v_main_~mid~0_532} AuxVars[] AssignedVars[] [2021-05-02 23:34:14,966 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:14,981 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:14,989 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:15,007 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:15,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:15,113 INFO 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 23:34:15,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782739594] [2021-05-02 23:34:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1782739594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:17,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:17,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:34:17,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006009256] [2021-05-02 23:34:17,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:34:17,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:34:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:34:17,805 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 36 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 23:34:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:23,593 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-02 23:34:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:34:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 36 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 23:34:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:23,594 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:34:23,594 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:34:23,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 6052.0ms TimeCoverageRelationStatistics Valid=292, Invalid=5258, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:34:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:34:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 23:34:23,623 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 23:34:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-02 23:34:23,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-02 23:34:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:23,624 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-02 23:34:23,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 36 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 23:34:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-02 23:34:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:34:23,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:23,624 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:23,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:34:23,625 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:23,625 INFO L82 PathProgramCache]: Analyzing trace with hash -840087537, now seen corresponding path program 31 times [2021-05-02 23:34:23,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:23,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966394028] [2021-05-02 23:34:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:23,630 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_565) InVars {main_~mid~0=v_main_~mid~0_565} OutVars{main_~mid~0=v_main_~mid~0_565} AuxVars[] AssignedVars[] [2021-05-02 23:34:23,632 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:23,633 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:23,639 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:23,664 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:23,686 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,776 INFO 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 23:34:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:25,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:26,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:26,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:26,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:26,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:26,621 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966394028] [2021-05-02 23:34:26,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [966394028] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:26,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:26,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:34:26,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750255146] [2021-05-02 23:34:26,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:34:26,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:26,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:34:26,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:34:26,622 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 37 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 23:34:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:32,684 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:34:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:34:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 37 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 23:34:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:32,686 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:34:32,686 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:34:32,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 6390.5ms TimeCoverageRelationStatistics Valid=300, Invalid=5552, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:34:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:34:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 23:34:32,711 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 23:34:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 23:34:32,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-02 23:34:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:32,711 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 23:34:32,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 37 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 23:34:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 23:34:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:34:32,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:32,712 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:32,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:34:32,712 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -238414793, now seen corresponding path program 32 times [2021-05-02 23:34:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:32,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166951449] [2021-05-02 23:34:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:32,723 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_599) InVars {main_~mid~0=v_main_~mid~0_599} OutVars{main_~mid~0=v_main_~mid~0_599} AuxVars[] AssignedVars[] [2021-05-02 23:34:32,728 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:32,729 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:32,737 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:32,769 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:32,794 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:32,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:32,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:32,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:32,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:33,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,986 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:35,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166951449] [2021-05-02 23:34:35,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [166951449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:35,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:35,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:34:35,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077995570] [2021-05-02 23:34:35,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:34:35,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:34:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:34:35,987 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 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 23:34:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:42,549 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-02 23:34:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:34:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 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 23:34:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:42,551 INFO L225 Difference]: With dead ends: 51 [2021-05-02 23:34:42,551 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:34:42,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 7010.6ms TimeCoverageRelationStatistics Valid=308, Invalid=5854, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:34:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:34:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 23:34:42,579 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 23:34:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-02 23:34:42,580 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-02 23:34:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:42,580 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-02 23:34:42,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 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 23:34:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-02 23:34:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:34:42,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:42,580 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:42,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:34:42,581 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:42,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1233571087, now seen corresponding path program 33 times [2021-05-02 23:34:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:42,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499854039] [2021-05-02 23:34:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:42,588 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_634) InVars {main_~mid~0=v_main_~mid~0_634} OutVars{main_~mid~0=v_main_~mid~0_634} AuxVars[] AssignedVars[] [2021-05-02 23:34:42,590 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:42,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:42,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:42,635 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:42,667 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:42,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:42,790 INFO 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 23:34:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:44,569 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:44,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499854039] [2021-05-02 23:34:44,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [499854039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:44,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:44,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:34:44,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032851577] [2021-05-02 23:34:44,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:34:44,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:44,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:34:44,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1684, Unknown=1, NotChecked=0, Total=1806 [2021-05-02 23:34:44,571 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 39 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 23:34:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:48,949 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:34:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:34:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.025) internal successors, (41), 39 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 23:34:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:48,950 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:34:48,950 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:34:48,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 4717.5ms TimeCoverageRelationStatistics Valid=316, Invalid=6162, Unknown=2, NotChecked=0, Total=6480 [2021-05-02 23:34:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:34:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 23:34:48,985 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 23:34:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 23:34:48,986 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-02 23:34:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:48,986 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 23:34:48,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.025) internal successors, (41), 39 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 23:34:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 23:34:48,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:34:48,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:48,986 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:48,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:34:48,987 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -379506889, now seen corresponding path program 34 times [2021-05-02 23:34:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:48,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215199523] [2021-05-02 23:34:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:48,994 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_670) InVars {main_~mid~0=v_main_~mid~0_670} OutVars{main_~mid~0=v_main_~mid~0_670} AuxVars[] AssignedVars[] [2021-05-02 23:34:48,996 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:48,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:49,006 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:49,036 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:49,062 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:49,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:49,201 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 23:34:49,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:51,100 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:51,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215199523] [2021-05-02 23:34:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [215199523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:51,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:51,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:34:51,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25511705] [2021-05-02 23:34:51,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:34:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:34:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1767, Unknown=1, NotChecked=0, Total=1892 [2021-05-02 23:34:51,102 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 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 23:34:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:55,695 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-02 23:34:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:34:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 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 23:34:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:55,696 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:34:55,696 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 23:34:55,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 4934.8ms TimeCoverageRelationStatistics Valid=324, Invalid=6480, Unknown=2, NotChecked=0, Total=6806 [2021-05-02 23:34:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 23:34:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 23:34:55,727 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 23:34:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-02 23:34:55,728 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-02 23:34:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:55,728 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-02 23:34:55,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 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 23:34:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-02 23:34:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:34:55,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:55,729 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:55,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:34:55,729 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1154683407, now seen corresponding path program 35 times [2021-05-02 23:34:55,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:55,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781666745] [2021-05-02 23:34:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:55,742 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_707) InVars {main_~mid~0=v_main_~mid~0_707} OutVars{main_~mid~0=v_main_~mid~0_707} AuxVars[] AssignedVars[] [2021-05-02 23:34:55,744 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:34:55,758 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:55,765 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:34:55,782 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:34:55,805 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:34:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:55,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:55,923 INFO 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 23:34:55,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:55,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:55,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:58,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:58,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:58,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:58,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:58,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:58,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:59,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:59,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:59,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:59,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:00,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:00,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:00,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781666745] [2021-05-02 23:35:00,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [781666745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:00,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:00,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:35:00,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514720649] [2021-05-02 23:35:00,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:35:00,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:35:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1853, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:35:00,303 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 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 23:35:10,499 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-05-02 23:35:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:10,851 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:35:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:35:10,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 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 23:35:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:10,853 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:35:10,853 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:35:10,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 10758.4ms TimeCoverageRelationStatistics Valid=332, Invalid=6808, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:35:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:35:10,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 23:35:10,882 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 23:35:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 23:35:10,882 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-02 23:35:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:10,882 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 23:35:10,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 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 23:35:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 23:35:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:35:10,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:10,883 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:10,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:35:10,883 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1469942327, now seen corresponding path program 36 times [2021-05-02 23:35:10,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:10,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706888287] [2021-05-02 23:35:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:10,891 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_745) InVars {main_~mid~0=v_main_~mid~0_745} OutVars{main_~mid~0=v_main_~mid~0_745} AuxVars[] AssignedVars[] [2021-05-02 23:35:10,893 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:35:10,894 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:10,902 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:35:10,936 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:35:10,966 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:11,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:11,090 INFO 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 23:35:11,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:11,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:14,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:14,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:14,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:14,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:14,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:15,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:15,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:15,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:15,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:16,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:16,722 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706888287] [2021-05-02 23:35:16,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [706888287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:16,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:16,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:35:16,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143147403] [2021-05-02 23:35:16,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:35:16,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:16,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:35:16,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:35:16,723 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 42 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 23:35:27,722 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-05-02 23:35:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:28,129 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-02 23:35:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:35:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 42 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 23:35:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:28,132 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:35:28,132 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:35:28,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 12391.1ms TimeCoverageRelationStatistics Valid=340, Invalid=7142, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:35:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:35:28,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 23:35:28,169 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 23:35:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-02 23:35:28,170 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-02 23:35:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:28,170 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-02 23:35:28,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 42 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 23:35:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-02 23:35:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:35:28,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:28,171 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:28,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:35:28,171 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1641933041, now seen corresponding path program 37 times [2021-05-02 23:35:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:28,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841117183] [2021-05-02 23:35:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:28,191 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_784) InVars {main_~mid~0=v_main_~mid~0_784} OutVars{main_~mid~0=v_main_~mid~0_784} AuxVars[] AssignedVars[] [2021-05-02 23:35:28,194 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:35:28,196 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:28,210 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:35:28,270 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:35:28,321 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:28,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:28,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:28,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:29,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:31,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:31,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:31,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:31,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:32,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:32,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:33,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:33,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:33,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:33,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:34,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:34,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:34,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:35,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:35,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841117183] [2021-05-02 23:35:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841117183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:35,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:35,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:35:35,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107202188] [2021-05-02 23:35:35,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:35:35,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:35:35,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:35:35,211 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 43 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 23:35:48,820 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-05-02 23:35:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:49,296 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:35:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:35:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 43 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 23:35:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:49,299 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:35:49,299 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:35:49,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 15140.7ms TimeCoverageRelationStatistics Valid=348, Invalid=7484, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:35:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:35:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 23:35:49,336 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 23:35:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 23:35:49,337 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-02 23:35:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:49,337 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 23:35:49,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 43 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 23:35:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 23:35:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:35:49,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:49,338 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:49,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:35:49,338 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash 674178359, now seen corresponding path program 38 times [2021-05-02 23:35:49,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:49,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099490996] [2021-05-02 23:35:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:49,346 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_824) InVars {main_~mid~0=v_main_~mid~0_824} OutVars{main_~mid~0=v_main_~mid~0_824} AuxVars[] AssignedVars[] [2021-05-02 23:35:49,348 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:35:49,349 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:35:49,406 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:35:49,450 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:35:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:49,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:49,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:49,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:52,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:52,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:53,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:53,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:54,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:55,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:55,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:56,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:56,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:57,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:57,730 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099490996] [2021-05-02 23:35:57,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099490996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:57,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:57,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:35:57,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723080370] [2021-05-02 23:35:57,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:35:57,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:57,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:35:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:35:57,732 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 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 23:36:13,954 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-02 23:36:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:14,591 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-02 23:36:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:36:14,593 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 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 23:36:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:14,594 INFO L225 Difference]: With dead ends: 57 [2021-05-02 23:36:14,594 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:36:14,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 18026.0ms TimeCoverageRelationStatistics Valid=356, Invalid=7834, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:36:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:36:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 23:36:14,632 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 23:36:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-02 23:36:14,633 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-02 23:36:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:14,633 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-02 23:36:14,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 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 23:36:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-02 23:36:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:36:14,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:14,634 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:14,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:36:14,634 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -540812273, now seen corresponding path program 39 times [2021-05-02 23:36:14,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:14,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102525750] [2021-05-02 23:36:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:14,645 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_865) InVars {main_~mid~0=v_main_~mid~0_865} OutVars{main_~mid~0=v_main_~mid~0_865} AuxVars[] AssignedVars[] [2021-05-02 23:36:14,648 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:36:14,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:14,688 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:36:14,718 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:36:14,769 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:14,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:14,983 INFO 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 23:36:14,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:18,712 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:18,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102525750] [2021-05-02 23:36:18,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [102525750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:18,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:18,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:36:18,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131042211] [2021-05-02 23:36:18,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:36:18,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:18,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:36:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2212, Unknown=1, NotChecked=0, Total=2352 [2021-05-02 23:36:18,714 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 45 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 23:36:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:28,057 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:36:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:36:28,060 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 45 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 23:36:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:28,061 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:36:28,061 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:36:28,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 9416.1ms TimeCoverageRelationStatistics Valid=364, Invalid=8191, Unknown=1, NotChecked=0, Total=8556 [2021-05-02 23:36:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:36:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 23:36:28,105 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 23:36:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 23:36:28,106 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-02 23:36:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:28,106 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 23:36:28,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 45 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 23:36:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 23:36:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:36:28,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:28,107 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:28,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:36:28,107 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash 449183799, now seen corresponding path program 40 times [2021-05-02 23:36:28,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:28,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990951463] [2021-05-02 23:36:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:28,116 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_907) InVars {main_~mid~0=v_main_~mid~0_907} OutVars{main_~mid~0=v_main_~mid~0_907} AuxVars[] AssignedVars[] [2021-05-02 23:36:28,119 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:36:28,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:28,132 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:36:28,192 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:36:28,248 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:28,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:28,426 INFO 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 23:36:28,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:28,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:28,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:28,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:30,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:30,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:30,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:30,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:30,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:31,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:31,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:31,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:31,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:32,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:32,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:32,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:33,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:33,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:33,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:34,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:34,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:34,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:35,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:35,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:35,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:36,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:36,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:37,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:37,801 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:37,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990951463] [2021-05-02 23:36:37,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [990951463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:37,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:37,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:36:37,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152762494] [2021-05-02 23:36:37,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:36:37,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:36:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:36:37,802 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 46 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 23:36:58,185 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-05-02 23:36:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:58,872 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-02 23:36:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:36:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 46 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 23:36:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:58,876 INFO L225 Difference]: With dead ends: 59 [2021-05-02 23:36:58,876 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:36:58,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 21949.9ms TimeCoverageRelationStatistics Valid=372, Invalid=8558, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:36:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:36:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 23:36:58,918 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 23:36:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-02 23:36:58,919 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-02 23:36:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:58,919 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-02 23:36:58,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 46 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 23:36:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-02 23:36:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:36:58,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:58,919 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:58,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:36:58,919 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1074290959, now seen corresponding path program 41 times [2021-05-02 23:36:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:58,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258743033] [2021-05-02 23:36:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:58,931 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_950) InVars {main_~mid~0=v_main_~mid~0_950} OutVars{main_~mid~0=v_main_~mid~0_950} AuxVars[] AssignedVars[] [2021-05-02 23:36:58,933 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:36:58,935 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:58,948 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:36:59,008 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:36:59,070 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:36:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:59,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:59,298 INFO 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 23:36:59,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:03,643 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:03,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258743033] [2021-05-02 23:37:03,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258743033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:03,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:03,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:37:03,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147222831] [2021-05-02 23:37:03,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:37:03,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:03,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:37:03,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2404, Unknown=1, NotChecked=0, Total=2550 [2021-05-02 23:37:03,644 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 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 23:37:17,008 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-02 23:37:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:17,491 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:37:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:37:17,494 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 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 23:37:17,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:17,494 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:37:17,495 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:37:17,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 11734.4ms TimeCoverageRelationStatistics Valid=380, Invalid=8930, Unknown=2, NotChecked=0, Total=9312 [2021-05-02 23:37:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:37:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 23:37:17,534 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 23:37:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 23:37:17,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-02 23:37:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:17,534 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 23:37:17,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 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 23:37:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 23:37:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:37:17,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:17,535 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:17,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:37:17,535 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1022223561, now seen corresponding path program 42 times [2021-05-02 23:37:17,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:17,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593836258] [2021-05-02 23:37:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:17,545 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_994) InVars {main_~mid~0=v_main_~mid~0_994} OutVars{main_~mid~0=v_main_~mid~0_994} AuxVars[] AssignedVars[] [2021-05-02 23:37:17,548 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:37:17,573 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:17,587 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:37:17,623 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:37:17,690 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:37:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:17,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:17,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:19,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:19,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:19,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:19,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:20,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:20,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:21,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:21,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:21,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:21,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:22,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:22,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:22,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:23,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:23,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:23,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:24,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:24,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:25,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:25,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:25,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:26,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:27,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:27,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:28,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:29,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:29,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:30,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:30,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:30,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593836258] [2021-05-02 23:37:30,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593836258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:30,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:30,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:37:30,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96629350] [2021-05-02 23:37:30,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:37:30,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:37:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2504, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:37:30,865 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 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 23:37:36,607 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:37:56,350 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-05-02 23:37:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:57,232 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-02 23:37:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:37:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 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 23:37:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:57,237 INFO L225 Difference]: With dead ends: 61 [2021-05-02 23:37:57,237 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:37:57,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 28362.5ms TimeCoverageRelationStatistics Valid=388, Invalid=9314, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:37:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:37:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 23:37:57,278 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 23:37:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-02 23:37:57,279 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-02 23:37:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:57,279 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-02 23:37:57,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 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 23:37:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-02 23:37:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:37:57,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:57,280 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:57,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:37:57,280 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1589664241, now seen corresponding path program 43 times [2021-05-02 23:37:57,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:57,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327610471] [2021-05-02 23:37:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:57,297 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1039) InVars {main_~mid~0=v_main_~mid~0_1039} OutVars{main_~mid~0=v_main_~mid~0_1039} AuxVars[] AssignedVars[] [2021-05-02 23:37:57,301 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:37:57,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:57,322 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:37:57,406 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:37:57,485 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:37:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:57,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:57,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:03,587 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:03,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327610471] [2021-05-02 23:38:03,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327610471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:03,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:03,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:38:03,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881250058] [2021-05-02 23:38:03,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:38:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:38:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2604, Unknown=1, NotChecked=0, Total=2756 [2021-05-02 23:38:03,588 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:18,916 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-02 23:38:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:19,609 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:38:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:38:19,614 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.02) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (3), 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 55 [2021-05-02 23:38:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:19,615 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:38:19,615 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:38:19,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 15362.5ms TimeCoverageRelationStatistics Valid=396, Invalid=9702, Unknown=2, NotChecked=0, Total=10100 [2021-05-02 23:38:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:38:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 23:38:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 23:38:19,662 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-05-02 23:38:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:19,662 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 23:38:19,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.02) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 23:38:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:38:19,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:19,663 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:19,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:38:19,663 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2000456137, now seen corresponding path program 44 times [2021-05-02 23:38:19,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:19,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813544409] [2021-05-02 23:38:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:19,677 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1085) InVars {main_~mid~0=v_main_~mid~0_1085} OutVars{main_~mid~0=v_main_~mid~0_1085} AuxVars[] AssignedVars[] [2021-05-02 23:38:19,680 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:38:19,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:19,731 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:38:19,770 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:38:19,847 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:38:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:20,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:20,146 INFO 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 23:38:20,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:20,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:22,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:22,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:22,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:23,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:23,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:23,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:25,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:25,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:25,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:26,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:26,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:26,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:27,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:27,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:28,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:28,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:29,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:31,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:31,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:32,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:33,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:33,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:34,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:35,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:36,864 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:36,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813544409] [2021-05-02 23:38:36,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813544409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:36,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:36,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:38:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681449001] [2021-05-02 23:38:36,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:38:36,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:36,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:38:36,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2708, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:38:36,866 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:39,816 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:40,646 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:44,167 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:47,040 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:47,714 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:48,487 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:49,289 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:50,059 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:55,417 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:56,150 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:38:57,697 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:39:06,533 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:39:10,592 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-05-02 23:39:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:11,619 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-02 23:39:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:39:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 23:39:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:11,625 INFO L225 Difference]: With dead ends: 63 [2021-05-02 23:39:11,625 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:39:11,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 37144.5ms TimeCoverageRelationStatistics Valid=404, Invalid=10102, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:39:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:39:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 23:39:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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 23:39:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-02 23:39:11,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-05-02 23:39:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:11,679 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-02 23:39:11,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-02 23:39:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:39:11,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:11,679 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:11,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:39:11,679 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1850103025, now seen corresponding path program 45 times [2021-05-02 23:39:11,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:11,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163322803] [2021-05-02 23:39:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:11,693 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1132) InVars {main_~mid~0=v_main_~mid~0_1132} OutVars{main_~mid~0=v_main_~mid~0_1132} AuxVars[] AssignedVars[] [2021-05-02 23:39:11,697 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:39:11,734 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:11,753 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:39:11,806 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:39:11,897 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:39:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:12,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:12,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:12,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:12,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:12,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:12,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:12,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:13,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:13,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:13,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:14,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:14,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:15,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:15,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:16,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:16,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:17,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:17,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:17,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:18,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:19,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:19,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:20,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:21,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:21,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:22,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:23,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:24,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:24,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:25,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:25,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:26,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:27,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:27,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:29,092 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163322803] [2021-05-02 23:39:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [163322803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:29,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:29,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:39:29,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032810659] [2021-05-02 23:39:29,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:39:29,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:39:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:39:29,094 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:32,296 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:33,075 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:33,868 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:35,493 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:36,383 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:37,260 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:38,165 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:39,017 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:39,808 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:40,528 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:41,222 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:42,556 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:43,283 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:45,298 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:45,970 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:46,646 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:47,306 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:48,014 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:48,822 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:49,637 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:50,509 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:51,344 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:52,962 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:53,768 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:54,523 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:55,342 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:56,135 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:56,895 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:57,697 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:58,545 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:39:59,420 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:00,338 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:01,235 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:02,132 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:03,252 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:04,301 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:05,287 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:06,369 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-05-02 23:40:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:07,574 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 23:40:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:40:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (3), 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 57 [2021-05-02 23:40:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:07,582 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:40:07,582 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:40:07,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 39760.6ms TimeCoverageRelationStatistics Valid=412, Invalid=10508, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:40:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:40:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 23:40:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 23:40:07,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-05-02 23:40:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:07,628 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 23:40:07,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 23:40:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:40:07,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:07,629 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:07,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:40:07,629 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:07,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1484123849, now seen corresponding path program 46 times [2021-05-02 23:40:07,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:07,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728596076] [2021-05-02 23:40:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:07,643 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1180) InVars {main_~mid~0=v_main_~mid~0_1180} OutVars{main_~mid~0=v_main_~mid~0_1180} AuxVars[] AssignedVars[] [2021-05-02 23:40:07,647 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:40:07,692 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:07,718 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:40:07,790 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:40:07,935 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:40:07,943 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:08,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:08,351 INFO 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 23:40:08,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:08,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:08,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:08,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:09,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:09,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:10,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:10,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:10,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:11,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:11,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:12,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:12,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:13,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:14,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:15,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:16,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:17,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:17,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:18,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:19,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:20,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:20,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:21,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:21,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:22,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:24,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:26,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:27,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:28,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:28,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:28,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728596076] [2021-05-02 23:40:28,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728596076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:28,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:28,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:40:28,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642907557] [2021-05-02 23:40:28,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:40:28,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:40:28,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2920, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:40:28,974 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:30,657 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 23:40:31,698 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:40:32,679 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:33,623 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:34,631 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:35,560 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:36,440 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:37,388 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:38,357 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:39,311 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:40,153 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:41,082 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:42,003 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:42,848 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:43,844 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:44,847 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:45,837 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:46,836 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:47,766 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:48,728 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:49,691 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:50,680 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:51,556 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:52,553 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:53,424 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:54,300 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:55,216 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:56,085 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:57,003 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:58,077 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:40:59,040 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:00,100 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:01,128 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:01,993 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:02,948 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:03,940 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:04,938 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:05,939 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:06,957 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:07,948 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:08,978 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:09,988 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:10,903 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:11,816 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:12,858 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:13,716 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:14,898 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-05-02 23:41:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:16,346 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-02 23:41:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:41:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 23:41:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:16,355 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:41:16,355 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:41:16,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 48835.0ms TimeCoverageRelationStatistics Valid=420, Invalid=10922, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:41:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:41:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 23:41:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 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 23:41:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-02 23:41:16,407 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-05-02 23:41:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:16,407 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-02 23:41:16,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-02 23:41:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:41:16,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:16,408 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:16,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:41:16,408 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1271296015, now seen corresponding path program 47 times [2021-05-02 23:41:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:16,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248577903] [2021-05-02 23:41:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:16,430 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1229) InVars {main_~mid~0=v_main_~mid~0_1229} OutVars{main_~mid~0=v_main_~mid~0_1229} AuxVars[] AssignedVars[] [2021-05-02 23:41:16,435 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:41:16,438 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:16,469 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:41:16,588 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:41:16,710 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:41:16,717 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:16,929 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2021-05-02 23:41:17,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:17,155 INFO 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 23:41:17,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:17,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:17,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:17,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:17,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:18,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:18,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:18,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:18,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:19,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:19,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:20,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:21,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:21,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:21,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:22,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:22,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:23,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:23,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:24,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:25,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:25,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:26,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:26,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:27,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:28,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:28,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:29,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:29,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:30,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:31,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:31,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:32,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:33,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:33,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:35,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:36,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:36,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:38,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:39,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:40,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:41,381 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:41,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248577903] [2021-05-02 23:41:41,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248577903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:41,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:41,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:41:41,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491516845] [2021-05-02 23:41:41,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:41:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:41:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3029, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:41:41,382 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:43,561 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 23:41:44,563 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:41:45,582 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:46,560 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:47,486 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:48,477 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:49,321 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:50,329 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:52,011 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:53,053 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:54,052 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:55,025 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:55,884 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:56,787 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:57,775 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:58,741 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:41:59,617 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:00,498 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:01,310 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:02,224 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:03,149 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:04,259 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:05,376 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:06,392 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:07,262 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:08,182 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:09,093 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:10,051 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:11,189 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:12,299 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:13,152 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:14,142 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:15,019 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:15,900 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:16,850 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:17,736 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:18,735 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:19,770 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:20,869 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:21,815 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:22,809 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:23,729 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:24,701 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:25,610 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:26,513 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:27,521 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:42:28,903 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-05-02 23:42:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:29,925 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 23:42:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:42:29,932 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2021-05-02 23:42:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:29,932 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:42:29,933 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:42:29,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 53426.2ms TimeCoverageRelationStatistics Valid=428, Invalid=11344, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:42:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:42:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 23:42:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 23:42:29,993 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-05-02 23:42:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:29,993 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 23:42:29,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 23:42:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:42:29,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:29,994 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:29,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:42:29,994 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash 789965879, now seen corresponding path program 48 times [2021-05-02 23:42:29,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:29,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322645086] [2021-05-02 23:42:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:30,012 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1279) InVars {main_~mid~0=v_main_~mid~0_1279} OutVars{main_~mid~0=v_main_~mid~0_1279} AuxVars[] AssignedVars[] [2021-05-02 23:42:30,017 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:42:30,019 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:30,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:42:30,157 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:42:30,261 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:30,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:30,600 INFO 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 23:42:30,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:30,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:30,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:30,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:31,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:31,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:31,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:31,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:31,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:32,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:32,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:32,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:32,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:33,300 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:42:33,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:34,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:34,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:34,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:35,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:35,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:35,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:35,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:36,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:36,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:36,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:37,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:37,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:38,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:38,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:38,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:39,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:39,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:40,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:41,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:41,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:41,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:42,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:43,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:44,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:44,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:46,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:47,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:47,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:48,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:49,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:50,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:50,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322645086] [2021-05-02 23:42:50,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [322645086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:50,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:50,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:42:50,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923112740] [2021-05-02 23:42:50,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:42:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:50,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:42:50,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3140, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:42:50,123 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:52,666 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:42:53,609 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:54,539 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:55,604 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:56,415 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:57,329 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:58,201 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:59,042 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:42:59,932 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:00,806 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:01,758 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:03,568 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:04,549 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:05,377 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:06,201 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:06,922 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:07,748 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:08,617 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:10,313 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:11,184 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:11,978 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:12,863 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:14,513 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:16,919 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:17,967 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:18,886 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:19,766 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:20,624 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:24,414 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:25,190 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:26,007 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:26,844 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:27,841 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:28,836 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:43:32,991 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-05-02 23:43:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:34,339 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-02 23:43:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:43:34,346 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:43:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:34,347 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:43:34,347 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 23:43:34,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 45152.2ms TimeCoverageRelationStatistics Valid=436, Invalid=11774, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:43:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 23:43:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 23:43:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 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 23:43:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-02 23:43:34,404 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-05-02 23:43:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:34,404 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-02 23:43:34,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-02 23:43:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:43:34,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:34,405 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:34,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:43:34,405 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1246366449, now seen corresponding path program 49 times [2021-05-02 23:43:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:34,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652936582] [2021-05-02 23:43:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:34,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1330) InVars {main_~mid~0=v_main_~mid~0_1330} OutVars{main_~mid~0=v_main_~mid~0_1330} AuxVars[] AssignedVars[] [2021-05-02 23:43:34,423 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:43:34,461 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:34,480 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:43:34,532 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:43:34,629 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:34,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:35,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:36,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:36,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:36,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:36,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:37,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:37,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:37,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:38,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:38,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:38,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:39,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:39,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:40,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:41,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:42,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:43,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:43,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:45,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:45,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:46,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:48,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:48,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:49,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:50,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:51,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:51,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:52,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:53,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:56,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:57,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:58,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:58,917 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:58,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652936582] [2021-05-02 23:43:58,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [652936582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:58,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:58,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:43:58,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049751030] [2021-05-02 23:43:58,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:43:58,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:43:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:43:58,919 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:00,939 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:44:01,863 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 23:44:02,784 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:03,732 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:04,729 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:05,702 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:06,849 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:07,730 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:08,667 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:09,530 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:11,247 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:12,103 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:13,011 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:13,951 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:14,994 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:15,929 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:16,779 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:17,642 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:18,744 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:19,616 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:20,568 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:21,400 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:22,282 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:23,311 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:24,887 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:25,760 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:27,475 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:28,393 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:30,242 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:31,263 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:32,162 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:32,995 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:34,083 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:35,105 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:36,024 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:36,821 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:37,820 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:38,745 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:39,741 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:40,945 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:42,017 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:43,007 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:43,976 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:44,906 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:45,717 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:44:46,747 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-05-02 23:44:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:47,935 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 23:44:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:44:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (3), 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 61 [2021-05-02 23:44:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:47,942 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:44:47,942 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:44:47,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 52444.8ms TimeCoverageRelationStatistics Valid=444, Invalid=12212, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:44:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:44:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 23:44:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 23:44:47,999 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-05-02 23:44:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:47,999 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 23:44:47,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 23:44:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:44:48,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:48,000 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:48,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:44:48,000 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash 51840823, now seen corresponding path program 50 times [2021-05-02 23:44:48,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:48,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609897219] [2021-05-02 23:44:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:48,015 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1382) InVars {main_~mid~0=v_main_~mid~0_1382} OutVars{main_~mid~0=v_main_~mid~0_1382} AuxVars[] AssignedVars[] [2021-05-02 23:44:48,018 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:44:48,021 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:48,044 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:44:48,142 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:44:48,250 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:44:48,257 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:48,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:48,669 INFO 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 23:44:48,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:58,415 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:58,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609897219] [2021-05-02 23:44:58,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [609897219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:58,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:58,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:44:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28398271] [2021-05-02 23:44:58,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:44:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:58,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:44:58,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3367, Unknown=1, NotChecked=0, Total=3540 [2021-05-02 23:44:58,417 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:59,438 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:45:21,298 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-05-02 23:45:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:22,253 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-02 23:45:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:45:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 23:45:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:22,261 INFO L225 Difference]: With dead ends: 69 [2021-05-02 23:45:22,261 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:45:22,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 22221.0ms TimeCoverageRelationStatistics Valid=452, Invalid=12657, Unknown=1, NotChecked=0, Total=13110 [2021-05-02 23:45:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:45:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 23:45:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 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 23:45:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-02 23:45:22,319 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-05-02 23:45:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:22,319 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-02 23:45:22,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-02 23:45:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:45:22,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:22,320 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:22,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:45:22,320 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:22,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1641560591, now seen corresponding path program 51 times [2021-05-02 23:45:22,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:22,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611523136] [2021-05-02 23:45:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:22,334 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1435) InVars {main_~mid~0=v_main_~mid~0_1435} OutVars{main_~mid~0=v_main_~mid~0_1435} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,338 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:45:22,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,406 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:45:22,484 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:45:22,607 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:45:22,614 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:22,934 INFO 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 23:45:22,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:23,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:24,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:24,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:24,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:25,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:25,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:25,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:26,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:26,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:27,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:27,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:27,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:29,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:30,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:31,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:31,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:32,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:32,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:33,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:33,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:34,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:35,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:36,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:38,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:38,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:41,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:42,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:42,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:43,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:44,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:48,675 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:48,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611523136] [2021-05-02 23:45:48,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [611523136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:48,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:48,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:45:48,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548813894] [2021-05-02 23:45:48,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:45:48,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:45:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3485, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:45:48,677 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:50,604 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 23:45:51,583 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 23:45:52,647 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:53,567 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:54,610 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:55,669 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:56,672 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:57,635 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:58,638 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:45:59,746 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:00,663 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:01,670 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:02,541 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:03,524 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:04,670 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:05,826 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:06,889 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:07,971 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:09,005 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:10,091 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:11,045 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:11,849 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:12,741 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:13,666 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:14,566 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:15,482 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:16,423 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:17,377 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:18,308 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:19,284 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:20,244 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:21,097 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:21,937 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:22,993 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:23,927 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:24,909 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:25,777 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:26,735 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:27,661 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:28,649 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:29,597 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:30,551 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:31,385 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:32,431 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:33,264 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:34,279 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:35,221 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:36,135 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:37,050 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:38,010 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:38,908 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:46:39,926 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-05-02 23:46:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:41,039 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 23:46:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:46:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2021-05-02 23:46:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:41,045 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:46:41,045 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:46:41,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 56494.4ms TimeCoverageRelationStatistics Valid=460, Invalid=13112, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:46:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:46:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 23:46:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 23:46:41,106 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-05-02 23:46:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:41,106 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 23:46:41,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 23:46:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:46:41,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:41,106 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:41,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:46:41,106 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash -616734153, now seen corresponding path program 52 times [2021-05-02 23:46:41,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:41,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489123926] [2021-05-02 23:46:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:41,120 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 v_main_~mid~0_1489) InVars {main_~mid~0=v_main_~mid~0_1489} OutVars{main_~mid~0=v_main_~mid~0_1489} AuxVars[] AssignedVars[] [2021-05-02 23:46:41,122 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 23:46:41,124 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:41,145 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-02 23:46:41,234 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 87.5 percent of original size 56 [2021-05-02 23:46:41,338 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:41,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:41,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:41,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:42,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:42,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:42,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:43,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:43,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:43,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:44,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:44,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:44,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:45,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:45,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:46,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:46,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:46,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:47,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:48,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:50,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:50,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:51,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:51,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:52,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:52,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:54,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:54,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:55,161 WARN L159 QuantifierPusher]: Ignoring assumption.