/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/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:33:17,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:33:17,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:33:17,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:33:17,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:33:17,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:33:17,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:33:17,450 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 23:33:17,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:33:17,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:33:17,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:33:17,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:33:17,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:33:17,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:33:17,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:33:17,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:33:17,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:33:17,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:33:17,472 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:33:17,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:33:17,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:33:17,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:33:17,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:33:17,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:33:17,741 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:33:17,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-05-02 23:33:17,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c2c669e/18b748a5dacc447388d58340917f7201/FLAG002b6669f [2021-05-02 23:33:18,184 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:33:18,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-05-02 23:33:18,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c2c669e/18b748a5dacc447388d58340917f7201/FLAG002b6669f [2021-05-02 23:33:18,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c2c669e/18b748a5dacc447388d58340917f7201 [2021-05-02 23:33:18,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:33:18,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:33:18,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:33:18,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:33:18,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:33:18,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c03755b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18, skipping insertion in model container [2021-05-02 23:33:18,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:33:18,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:33:18,754 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/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-05-02 23:33:18,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:33:18,768 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:33:18,800 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/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-05-02 23:33:18,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:33:18,819 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:33:18,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18 WrapperNode [2021-05-02 23:33:18,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:33:18,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:33:18,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:33:18,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:33:18,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (1/1) ... [2021-05-02 23:33:18,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:33:18,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:33:18,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:33:18,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:33:18,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (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 23:33:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:33:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:33:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:33:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:33:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:33:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:33:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:33:19,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:33:19,119 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-02 23:33:19,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:33:19 BoogieIcfgContainer [2021-05-02 23:33:19,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:33:19,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:33:19,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:33:19,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:33:19,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:33:18" (1/3) ... [2021-05-02 23:33:19,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ef9878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:33:19, skipping insertion in model container [2021-05-02 23:33:19,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:18" (2/3) ... [2021-05-02 23:33:19,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ef9878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:33:19, skipping insertion in model container [2021-05-02 23:33:19,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:33:19" (3/3) ... [2021-05-02 23:33:19,125 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2021-05-02 23:33:19,136 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:33:19,138 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:33:19,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:33:19,170 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:33:19,170 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:33:19,170 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:33:19,170 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:33:19,170 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:33:19,170 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:33:19,171 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:33:19,171 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:33:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:33:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:19,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:19,187 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:19,187 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash 66787427, now seen corresponding path program 1 times [2021-05-02 23:33:19,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:19,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430548865] [2021-05-02 23:33:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:19,242 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:19,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:19,450 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:19,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430548865] [2021-05-02 23:33:19,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [430548865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:19,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:19,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:33:19,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460747644] [2021-05-02 23:33:19,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:33:19,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:19,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:33:19,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:33:19,466 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:19,728 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2021-05-02 23:33:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:33:19,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:19,737 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:33:19,737 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:33:19,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:33:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:33:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 23:33:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-05-02 23:33:19,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 27 [2021-05-02 23:33:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:19,785 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-05-02 23:33:19,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-05-02 23:33:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:19,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:19,787 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:19,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:33:19,787 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:19,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1388086372, now seen corresponding path program 1 times [2021-05-02 23:33:19,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:19,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641041880] [2021-05-02 23:33:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:19,794 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:19,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:19,898 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:19,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641041880] [2021-05-02 23:33:19,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [641041880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:19,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:19,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:33:19,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024093327] [2021-05-02 23:33:19,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:33:19,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:33:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:33:19,900 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:20,018 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2021-05-02 23:33:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:33:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:20,020 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:33:20,021 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:33:20,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:33:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:33:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 23:33:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-05-02 23:33:20,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 27 [2021-05-02 23:33:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:20,038 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-05-02 23:33:20,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-05-02 23:33:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:20,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:20,040 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:20,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:33:20,045 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2120308874, now seen corresponding path program 1 times [2021-05-02 23:33:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:20,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263562657] [2021-05-02 23:33:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:20,047 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:20,124 INFO 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 23:33:20,124 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263562657] [2021-05-02 23:33:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [263562657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:20,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:20,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:33:20,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434985386] [2021-05-02 23:33:20,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:33:20,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:33:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:33:20,126 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:20,289 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-05-02 23:33:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:33:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:20,292 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:33:20,292 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:33:20,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:33:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:33:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 23:33:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 23:33:20,307 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2021-05-02 23:33:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:20,307 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 23:33:20,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 23:33:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:20,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:20,309 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:20,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:33:20,309 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash 80992202, now seen corresponding path program 1 times [2021-05-02 23:33:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:20,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299263706] [2021-05-02 23:33:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:20,313 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:20,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:20,414 INFO 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 23:33:20,415 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299263706] [2021-05-02 23:33:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299263706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:20,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:20,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:33:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105254330] [2021-05-02 23:33:20,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:33:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:33:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:33:20,417 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:20,624 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-05-02 23:33:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:33:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:20,626 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:33:20,626 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:33:20,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:33:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:33:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 23:33:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-05-02 23:33:20,635 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-05-02 23:33:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:20,637 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-05-02 23:33:20,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-05-02 23:33:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:20,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:20,639 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:20,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:33:20,639 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2094273526, now seen corresponding path program 1 times [2021-05-02 23:33:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:20,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971647608] [2021-05-02 23:33:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:20,642 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:20,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:20,728 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 23:33:20,728 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:20,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971647608] [2021-05-02 23:33:20,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971647608] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:20,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:20,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:33:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348823603] [2021-05-02 23:33:20,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:33:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:33:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:33:20,729 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:20,978 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-05-02 23:33:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:33:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:20,979 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:33:20,979 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:33:20,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:33:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:33:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 23:33:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 23:33:20,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2021-05-02 23:33:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:20,984 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 23:33:20,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 23:33:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:20,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:20,985 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:20,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:33:20,985 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2013335789, now seen corresponding path program 1 times [2021-05-02 23:33:20,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:20,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845513749] [2021-05-02 23:33:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:20,987 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,023 INFO 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 23:33:21,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:21,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845513749] [2021-05-02 23:33:21,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845513749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:21,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:21,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:33:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810611765] [2021-05-02 23:33:21,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:33:21,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:33:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:33:21,025 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:21,095 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 23:33:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:33:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:21,097 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:33:21,097 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:33:21,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:33:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:33:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 23:33:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 23:33:21,108 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2021-05-02 23:33:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:21,109 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 23:33:21,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 23:33:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:33:21,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:21,110 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:21,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:33:21,110 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2013901818, now seen corresponding path program 1 times [2021-05-02 23:33:21,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:21,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53341489] [2021-05-02 23:33:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:21,112 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,225 INFO 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 23:33:21,225 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:21,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53341489] [2021-05-02 23:33:21,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [53341489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:21,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:21,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:33:21,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734183372] [2021-05-02 23:33:21,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:33:21,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:33:21,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:33:21,226 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:21,591 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-02 23:33:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:33:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:33:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:21,593 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:33:21,593 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:33:21,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:33:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:33:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 23:33:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-02 23:33:21,597 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2021-05-02 23:33:21,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:21,597 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-02 23:33:21,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-02 23:33:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:33:21,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:21,598 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:21,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:33:21,598 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2072871847, now seen corresponding path program 1 times [2021-05-02 23:33:21,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:21,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231244154] [2021-05-02 23:33:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:21,635 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_63 100) (<= 50 v_main_~main__x~0_63)) InVars {main_~main__x~0=v_main_~main__x~0_63} OutVars{main_~main__x~0=v_main_~main__x~0_63} AuxVars[] AssignedVars[] [2021-05-02 23:33:21,646 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:21,650 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:21,663 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:21,679 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:21,682 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:21,707 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:21,724 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:21,825 INFO 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 23:33:21,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:21,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231244154] [2021-05-02 23:33:21,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231244154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:21,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:21,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:33:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660169662] [2021-05-02 23:33:21,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:33:21,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:21,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:33:21,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:33:21,832 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:22,150 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 23:33:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:33:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:33:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:22,151 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:33:22,151 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:33:22,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:33:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:33:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 23:33:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-02 23:33:22,156 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-05-02 23:33:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:22,157 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-02 23:33:22,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-02 23:33:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:33:22,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:22,157 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:22,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:33:22,157 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash -928406012, now seen corresponding path program 1 times [2021-05-02 23:33:22,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:22,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154657473] [2021-05-02 23:33:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:22,163 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_67 50) InVars {main_~main__x~0=v_main_~main__x~0_67} OutVars{main_~main__x~0=v_main_~main__x~0_67} AuxVars[] AssignedVars[] [2021-05-02 23:33:22,166 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:22,172 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:22,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:22,183 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:22,199 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_69 100) (<= 50 v_main_~main__x~0_69)) InVars {main_~main__x~0=v_main_~main__x~0_69} OutVars{main_~main__x~0=v_main_~main__x~0_69} AuxVars[] AssignedVars[] [2021-05-02 23:33:22,204 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:22,219 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:22,221 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:22,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:22,233 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:22,246 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:22,261 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:22,263 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_71 50) (< v_main_~main__x~0_71 99)) InVars {main_~main__x~0=v_main_~main__x~0_71} OutVars{main_~main__x~0=v_main_~main__x~0_71} AuxVars[] AssignedVars[] [2021-05-02 23:33:22,273 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:22,280 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:22,289 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:22,296 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:22,306 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:22,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:22,549 INFO 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 23:33:22,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:22,646 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154657473] [2021-05-02 23:33:22,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154657473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:22,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:22,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:33:22,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231214440] [2021-05-02 23:33:22,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:33:22,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:22,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:33:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:33:22,648 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:23,110 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 23:33:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:33:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:33:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:23,111 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:33:23,111 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:33:23,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=309, Invalid=503, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:33:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:33:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 23:33:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 23:33:23,116 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2021-05-02 23:33:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:23,116 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 23:33:23,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 23:33:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:33:23,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:23,117 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:23,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:33:23,117 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1061594401, now seen corresponding path program 2 times [2021-05-02 23:33:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904728568] [2021-05-02 23:33:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:23,123 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_77 50) InVars {main_~main__x~0=v_main_~main__x~0_77} OutVars{main_~main__x~0=v_main_~main__x~0_77} AuxVars[] AssignedVars[] [2021-05-02 23:33:23,126 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:23,135 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:23,139 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:23,146 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:23,158 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_79) (< v_main_~main__x~0_79 100)) InVars {main_~main__x~0=v_main_~main__x~0_79} OutVars{main_~main__x~0=v_main_~main__x~0_79} AuxVars[] AssignedVars[] [2021-05-02 23:33:23,161 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:23,163 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:23,165 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:23,174 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:23,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:23,198 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:23,211 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:23,213 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_81 99) (< v_main_~main__x~0_81 50)) InVars {main_~main__x~0=v_main_~main__x~0_81} OutVars{main_~main__x~0=v_main_~main__x~0_81} AuxVars[] AssignedVars[] [2021-05-02 23:33:23,216 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:23,222 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:23,227 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:23,234 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:23,242 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:23,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:23,459 INFO 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 23:33:23,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:23,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:23,570 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:23,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904728568] [2021-05-02 23:33:23,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904728568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:23,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:23,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:33:23,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759786713] [2021-05-02 23:33:23,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:33:23,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:23,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:33:23,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:33:23,571 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:24,085 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 23:33:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:33:24,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:33:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:24,085 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:33:24,086 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:33:24,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:33:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:33:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 23:33:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-02 23:33:24,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2021-05-02 23:33:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:24,091 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-02 23:33:24,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-02 23:33:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:33:24,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:24,092 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:24,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:33:24,092 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2103422722, now seen corresponding path program 3 times [2021-05-02 23:33:24,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:24,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116737291] [2021-05-02 23:33:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:24,100 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_88 50) InVars {main_~main__x~0=v_main_~main__x~0_88} OutVars{main_~main__x~0=v_main_~main__x~0_88} AuxVars[] AssignedVars[] [2021-05-02 23:33:24,102 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:24,108 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:24,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:24,118 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:24,128 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_90) (< v_main_~main__x~0_90 100)) InVars {main_~main__x~0=v_main_~main__x~0_90} OutVars{main_~main__x~0=v_main_~main__x~0_90} AuxVars[] AssignedVars[] [2021-05-02 23:33:24,130 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:24,131 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:24,134 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:24,142 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:24,144 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:24,164 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:24,179 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:24,182 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_92 99) (< v_main_~main__x~0_92 50)) InVars {main_~main__x~0=v_main_~main__x~0_92} OutVars{main_~main__x~0=v_main_~main__x~0_92} AuxVars[] AssignedVars[] [2021-05-02 23:33:24,183 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:24,189 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:24,194 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:24,201 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:24,219 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:24,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:24,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:24,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:24,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116737291] [2021-05-02 23:33:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [116737291] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:24,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:24,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:33:24,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894155315] [2021-05-02 23:33:24,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:33:24,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:33:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:33:24,539 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:25,102 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 23:33:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:33:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:33:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:25,103 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:33:25,103 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:33:25,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 658.5ms TimeCoverageRelationStatistics Valid=398, Invalid=658, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:33:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:33:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 23:33:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-02 23:33:25,108 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2021-05-02 23:33:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:25,108 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-02 23:33:25,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-02 23:33:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:33:25,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:25,109 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:25,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:33:25,109 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1446934939, now seen corresponding path program 4 times [2021-05-02 23:33:25,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:25,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819310481] [2021-05-02 23:33:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:25,114 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_100 50) InVars {main_~main__x~0=v_main_~main__x~0_100} OutVars{main_~main__x~0=v_main_~main__x~0_100} AuxVars[] AssignedVars[] [2021-05-02 23:33:25,115 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:25,116 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:25,120 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:25,131 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:25,143 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_102) (< v_main_~main__x~0_102 100)) InVars {main_~main__x~0=v_main_~main__x~0_102} OutVars{main_~main__x~0=v_main_~main__x~0_102} AuxVars[] AssignedVars[] [2021-05-02 23:33:25,145 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:25,156 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:25,158 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:25,168 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:25,170 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:25,181 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:25,195 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:25,197 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_104 50) (< v_main_~main__x~0_104 99)) InVars {main_~main__x~0=v_main_~main__x~0_104} OutVars{main_~main__x~0=v_main_~main__x~0_104} AuxVars[] AssignedVars[] [2021-05-02 23:33:25,199 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:25,200 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:25,204 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:25,214 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:25,221 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:25,423 INFO 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 23:33:25,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:25,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:25,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:25,565 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:25,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819310481] [2021-05-02 23:33:25,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [819310481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:25,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:25,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:33:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647840122] [2021-05-02 23:33:25,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:33:25,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:25,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:33:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:33:25,567 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:26,183 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-02 23:33:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:33:26,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 23:33:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:26,183 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:33:26,184 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:33:26,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=447, Invalid=743, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:33:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:33:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 23:33:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 23:33:26,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2021-05-02 23:33:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:26,189 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 23:33:26,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 23:33:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:33:26,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:26,190 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:26,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:33:26,190 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1158353160, now seen corresponding path program 5 times [2021-05-02 23:33:26,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:26,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557950728] [2021-05-02 23:33:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:26,200 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_113 50) InVars {main_~main__x~0=v_main_~main__x~0_113} OutVars{main_~main__x~0=v_main_~main__x~0_113} AuxVars[] AssignedVars[] [2021-05-02 23:33:26,202 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:26,203 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:26,207 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:26,222 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:26,238 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_115) (< v_main_~main__x~0_115 100)) InVars {main_~main__x~0=v_main_~main__x~0_115} OutVars{main_~main__x~0=v_main_~main__x~0_115} AuxVars[] AssignedVars[] [2021-05-02 23:33:26,241 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:26,256 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:26,260 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:26,269 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:26,271 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:26,288 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:26,304 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:26,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_117 99) (< v_main_~main__x~0_117 50)) InVars {main_~main__x~0=v_main_~main__x~0_117} OutVars{main_~main__x~0=v_main_~main__x~0_117} AuxVars[] AssignedVars[] [2021-05-02 23:33:26,307 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:26,312 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:26,318 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:26,324 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:26,331 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:26,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:26,524 INFO 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 23:33:26,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:26,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:26,691 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:26,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557950728] [2021-05-02 23:33:26,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557950728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:26,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:26,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:33:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504291304] [2021-05-02 23:33:26,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:33:26,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:33:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=273, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:33:26,692 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:27,326 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 23:33:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:33:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:33:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:27,329 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:33:27,330 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:33:27,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=499, Invalid=833, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:33:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:33:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 23:33:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 23:33:27,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2021-05-02 23:33:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:27,338 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 23:33:27,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 23:33:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:33:27,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:27,339 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:27,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:33:27,339 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:27,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash -874282731, now seen corresponding path program 6 times [2021-05-02 23:33:27,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:27,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036242308] [2021-05-02 23:33:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:27,348 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_127 50) InVars {main_~main__x~0=v_main_~main__x~0_127} OutVars{main_~main__x~0=v_main_~main__x~0_127} AuxVars[] AssignedVars[] [2021-05-02 23:33:27,349 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:27,355 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:27,359 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:27,364 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:27,377 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_129 100) (<= 50 v_main_~main__x~0_129)) InVars {main_~main__x~0=v_main_~main__x~0_129} OutVars{main_~main__x~0=v_main_~main__x~0_129} AuxVars[] AssignedVars[] [2021-05-02 23:33:27,379 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:27,389 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:27,393 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:27,404 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:27,406 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:27,420 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:27,433 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:27,437 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_131 99) (< v_main_~main__x~0_131 50)) InVars {main_~main__x~0=v_main_~main__x~0_131} OutVars{main_~main__x~0=v_main_~main__x~0_131} AuxVars[] AssignedVars[] [2021-05-02 23:33:27,438 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:27,443 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:27,448 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:27,454 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:27,461 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:27,672 INFO 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 23:33:27,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:27,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:27,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:27,857 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:27,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036242308] [2021-05-02 23:33:27,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036242308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:27,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:27,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:33:27,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018272021] [2021-05-02 23:33:27,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:33:27,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:33:27,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=304, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:33:27,858 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:28,497 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 23:33:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:33:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 23:33:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:28,498 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:33:28,498 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:33:28,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=542, Invalid=940, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:33:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:33:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 23:33:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 23:33:28,504 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2021-05-02 23:33:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:28,504 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 23:33:28,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 23:33:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:33:28,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:28,505 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:28,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:33:28,505 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1534459890, now seen corresponding path program 7 times [2021-05-02 23:33:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285264046] [2021-05-02 23:33:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:28,516 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_142 50) InVars {main_~main__x~0=v_main_~main__x~0_142} OutVars{main_~main__x~0=v_main_~main__x~0_142} AuxVars[] AssignedVars[] [2021-05-02 23:33:28,517 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:28,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:28,522 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:28,532 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:28,543 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_144) (< v_main_~main__x~0_144 100)) InVars {main_~main__x~0=v_main_~main__x~0_144} OutVars{main_~main__x~0=v_main_~main__x~0_144} AuxVars[] AssignedVars[] [2021-05-02 23:33:28,545 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:28,554 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:28,556 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:28,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:28,567 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:28,578 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:28,590 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:28,592 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_146 99) (< v_main_~main__x~0_146 50)) InVars {main_~main__x~0=v_main_~main__x~0_146} OutVars{main_~main__x~0=v_main_~main__x~0_146} AuxVars[] AssignedVars[] [2021-05-02 23:33:28,593 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:28,600 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:28,604 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:28,609 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:28,617 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:28,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:28,767 INFO 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 23:33:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:28,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:28,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285264046] [2021-05-02 23:33:28,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [285264046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:28,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:28,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:33:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288307078] [2021-05-02 23:33:28,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:33:28,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:33:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=324, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:33:28,970 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:29,677 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 23:33:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:33:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 23:33:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:29,678 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:33:29,678 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:33:29,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:33:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:33:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 23:33:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-02 23:33:29,684 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2021-05-02 23:33:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:29,685 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-02 23:33:29,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-02 23:33:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:33:29,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:29,685 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:29,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:33:29,685 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1348746127, now seen corresponding path program 8 times [2021-05-02 23:33:29,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:29,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192738115] [2021-05-02 23:33:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:29,692 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_158 50) InVars {main_~main__x~0=v_main_~main__x~0_158} OutVars{main_~main__x~0=v_main_~main__x~0_158} AuxVars[] AssignedVars[] [2021-05-02 23:33:29,693 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:29,699 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:29,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:29,723 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:29,733 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_160) (< v_main_~main__x~0_160 100)) InVars {main_~main__x~0=v_main_~main__x~0_160} OutVars{main_~main__x~0=v_main_~main__x~0_160} AuxVars[] AssignedVars[] [2021-05-02 23:33:29,741 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:29,742 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:29,745 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:29,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:29,757 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:29,775 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:29,791 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:29,792 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_162 99) (< v_main_~main__x~0_162 50)) InVars {main_~main__x~0=v_main_~main__x~0_162} OutVars{main_~main__x~0=v_main_~main__x~0_162} AuxVars[] AssignedVars[] [2021-05-02 23:33:29,794 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:29,798 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:29,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:29,808 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:29,815 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:29,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:29,986 INFO 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 23:33:29,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:30,241 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:30,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192738115] [2021-05-02 23:33:30,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [192738115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:30,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:33:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476042379] [2021-05-02 23:33:30,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:33:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:33:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=351, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:33:30,242 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:30,939 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-05-02 23:33:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:33:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:33:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:30,940 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:33:30,940 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:33:30,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 914.9ms TimeCoverageRelationStatistics Valid=673, Invalid=1133, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:33:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:33:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 23:33:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-05-02 23:33:30,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2021-05-02 23:33:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:30,946 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-05-02 23:33:30,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-05-02 23:33:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:33:30,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:30,946 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:30,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:33:30,947 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1028520980, now seen corresponding path program 9 times [2021-05-02 23:33:30,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:30,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673825256] [2021-05-02 23:33:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:30,952 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_175 50) InVars {main_~main__x~0=v_main_~main__x~0_175} OutVars{main_~main__x~0=v_main_~main__x~0_175} AuxVars[] AssignedVars[] [2021-05-02 23:33:30,953 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:30,958 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:30,962 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:30,968 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:30,977 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_177) (< v_main_~main__x~0_177 100)) InVars {main_~main__x~0=v_main_~main__x~0_177} OutVars{main_~main__x~0=v_main_~main__x~0_177} AuxVars[] AssignedVars[] [2021-05-02 23:33:30,982 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:30,983 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:30,984 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:30,992 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:30,994 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:31,013 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:31,027 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:31,028 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_179 50) (< v_main_~main__x~0_179 99)) InVars {main_~main__x~0=v_main_~main__x~0_179} OutVars{main_~main__x~0=v_main_~main__x~0_179} AuxVars[] AssignedVars[] [2021-05-02 23:33:31,029 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:31,034 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:31,047 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:31,052 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:31,060 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:31,240 INFO 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 23:33:31,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:31,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:31,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:31,502 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673825256] [2021-05-02 23:33:31,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [673825256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:31,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:31,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:33:31,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891521804] [2021-05-02 23:33:31,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:33:31,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:31,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:33:31,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=379, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:33:31,504 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:32,296 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-02 23:33:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:33:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 23:33:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:32,297 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:33:32,297 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:33:32,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1002.4ms TimeCoverageRelationStatistics Valid=737, Invalid=1243, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:33:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:33:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 23:33:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-02 23:33:32,303 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2021-05-02 23:33:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:32,303 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-02 23:33:32,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-02 23:33:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:33:32,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:32,304 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:32,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:33:32,304 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash -659609335, now seen corresponding path program 10 times [2021-05-02 23:33:32,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:32,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624591259] [2021-05-02 23:33:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:32,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_193 50) InVars {main_~main__x~0=v_main_~main__x~0_193} OutVars{main_~main__x~0=v_main_~main__x~0_193} AuxVars[] AssignedVars[] [2021-05-02 23:33:32,310 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:32,310 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:32,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:32,323 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:32,332 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_195) (< v_main_~main__x~0_195 100)) InVars {main_~main__x~0=v_main_~main__x~0_195} OutVars{main_~main__x~0=v_main_~main__x~0_195} AuxVars[] AssignedVars[] [2021-05-02 23:33:32,333 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:32,334 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:32,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:32,346 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:32,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:32,366 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:32,379 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:32,380 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_197 50) (< v_main_~main__x~0_197 99)) InVars {main_~main__x~0=v_main_~main__x~0_197} OutVars{main_~main__x~0=v_main_~main__x~0_197} AuxVars[] AssignedVars[] [2021-05-02 23:33:32,381 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:32,382 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:32,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:32,396 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:32,403 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:32,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:32,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:32,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:32,867 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:32,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624591259] [2021-05-02 23:33:32,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624591259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:32,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:32,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:33:32,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542807790] [2021-05-02 23:33:32,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:33:32,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:32,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:33:32,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=408, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:33:32,868 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:33,766 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-02 23:33:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:33:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 23:33:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:33,767 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:33:33,767 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:33:33,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1103.6ms TimeCoverageRelationStatistics Valid=804, Invalid=1358, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:33:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:33:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 23:33:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 23:33:33,773 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2021-05-02 23:33:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:33,773 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 23:33:33,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 23:33:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:33:33,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:33,774 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:33,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:33:33,774 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1677163238, now seen corresponding path program 11 times [2021-05-02 23:33:33,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:33,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33579804] [2021-05-02 23:33:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:33,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_212 50) InVars {main_~main__x~0=v_main_~main__x~0_212} OutVars{main_~main__x~0=v_main_~main__x~0_212} AuxVars[] AssignedVars[] [2021-05-02 23:33:33,789 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:33,794 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:33,797 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:33,803 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:33,811 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_214) (< v_main_~main__x~0_214 100)) InVars {main_~main__x~0=v_main_~main__x~0_214} OutVars{main_~main__x~0=v_main_~main__x~0_214} AuxVars[] AssignedVars[] [2021-05-02 23:33:33,813 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:33,822 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:33,833 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:33,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:33,845 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:33,857 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:33,873 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:33,879 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_216 99) (< v_main_~main__x~0_216 50)) InVars {main_~main__x~0=v_main_~main__x~0_216} OutVars{main_~main__x~0=v_main_~main__x~0_216} AuxVars[] AssignedVars[] [2021-05-02 23:33:33,881 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:33,881 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:33,885 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:33,895 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:33,903 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:34,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:34,062 INFO 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 23:33:34,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:34,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:34,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:34,375 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:34,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33579804] [2021-05-02 23:33:34,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [33579804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:34,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:34,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:33:34,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815280416] [2021-05-02 23:33:34,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:33:34,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:33:34,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=438, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:33:34,377 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:35,329 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-02 23:33:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:33:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:33:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:35,331 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:33:35,331 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:33:35,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1147.1ms TimeCoverageRelationStatistics Valid=874, Invalid=1478, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:33:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:33:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 23:33:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-02 23:33:35,341 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2021-05-02 23:33:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:35,341 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-02 23:33:35,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-02 23:33:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:33:35,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:35,341 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:35,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:33:35,341 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1047710083, now seen corresponding path program 12 times [2021-05-02 23:33:35,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:35,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994661064] [2021-05-02 23:33:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:35,348 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_232 50) InVars {main_~main__x~0=v_main_~main__x~0_232} OutVars{main_~main__x~0=v_main_~main__x~0_232} AuxVars[] AssignedVars[] [2021-05-02 23:33:35,350 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:35,354 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:35,364 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:35,369 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:35,383 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_234) (< v_main_~main__x~0_234 100)) InVars {main_~main__x~0=v_main_~main__x~0_234} OutVars{main_~main__x~0=v_main_~main__x~0_234} AuxVars[] AssignedVars[] [2021-05-02 23:33:35,384 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:35,385 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:35,386 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:35,393 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:35,395 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:35,413 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:35,426 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:35,428 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_236 99) (< v_main_~main__x~0_236 50)) InVars {main_~main__x~0=v_main_~main__x~0_236} OutVars{main_~main__x~0=v_main_~main__x~0_236} AuxVars[] AssignedVars[] [2021-05-02 23:33:35,429 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:35,434 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:35,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:35,444 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:35,451 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:35,626 INFO 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 23:33:35,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:35,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:35,944 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994661064] [2021-05-02 23:33:35,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [994661064] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:35,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:35,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:33:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111555012] [2021-05-02 23:33:35,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:33:35,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:33:35,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:33:35,946 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:36,881 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-05-02 23:33:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:33:36,881 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 23:33:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:36,882 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:33:36,882 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:33:36,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1170.0ms TimeCoverageRelationStatistics Valid=923, Invalid=1627, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:33:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:33:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 23:33:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-05-02 23:33:36,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2021-05-02 23:33:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:36,888 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-05-02 23:33:36,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-05-02 23:33:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:33:36,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:36,888 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:36,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:33:36,889 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1733616864, now seen corresponding path program 13 times [2021-05-02 23:33:36,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479277686] [2021-05-02 23:33:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:36,895 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_253 50) InVars {main_~main__x~0=v_main_~main__x~0_253} OutVars{main_~main__x~0=v_main_~main__x~0_253} AuxVars[] AssignedVars[] [2021-05-02 23:33:36,896 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:36,901 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:36,905 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:36,910 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:36,920 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_255 100) (<= 50 v_main_~main__x~0_255)) InVars {main_~main__x~0=v_main_~main__x~0_255} OutVars{main_~main__x~0=v_main_~main__x~0_255} AuxVars[] AssignedVars[] [2021-05-02 23:33:36,921 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:36,931 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:36,933 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:36,942 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:36,944 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:36,955 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:36,969 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:36,970 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_257 50) (< v_main_~main__x~0_257 99)) InVars {main_~main__x~0=v_main_~main__x~0_257} OutVars{main_~main__x~0=v_main_~main__x~0_257} AuxVars[] AssignedVars[] [2021-05-02 23:33:36,971 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:36,971 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:36,975 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:36,986 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:36,993 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:37,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:37,171 INFO 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 23:33:37,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:37,576 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479277686] [2021-05-02 23:33:37,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479277686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:37,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:37,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:33:37,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462376199] [2021-05-02 23:33:37,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:33:37,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:33:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=501, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:33:37,578 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:38,588 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-05-02 23:33:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:33:38,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 23:33:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:38,589 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:33:38,589 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:33:38,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1274.1ms TimeCoverageRelationStatistics Valid=1023, Invalid=1733, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:33:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:33:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 23:33:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-02 23:33:38,595 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2021-05-02 23:33:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:38,595 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-02 23:33:38,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-02 23:33:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:33:38,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:38,596 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:38,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:33:38,596 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash -534930179, now seen corresponding path program 14 times [2021-05-02 23:33:38,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:38,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455421068] [2021-05-02 23:33:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:38,602 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_275 50) InVars {main_~main__x~0=v_main_~main__x~0_275} OutVars{main_~main__x~0=v_main_~main__x~0_275} AuxVars[] AssignedVars[] [2021-05-02 23:33:38,603 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:38,607 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:38,611 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:38,616 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:38,630 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_277) (< v_main_~main__x~0_277 100)) InVars {main_~main__x~0=v_main_~main__x~0_277} OutVars{main_~main__x~0=v_main_~main__x~0_277} AuxVars[] AssignedVars[] [2021-05-02 23:33:38,632 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:38,633 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:38,634 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:38,643 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:38,645 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:38,662 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:38,675 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:38,676 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_279 99) (< v_main_~main__x~0_279 50)) InVars {main_~main__x~0=v_main_~main__x~0_279} OutVars{main_~main__x~0=v_main_~main__x~0_279} AuxVars[] AssignedVars[] [2021-05-02 23:33:38,677 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:38,678 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:38,681 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:38,690 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:38,697 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:38,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:38,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:39,243 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:39,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455421068] [2021-05-02 23:33:39,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [455421068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:39,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:39,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:33:39,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234983715] [2021-05-02 23:33:39,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:33:39,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:33:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=534, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:33:39,245 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:40,231 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-02 23:33:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:33:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 23:33:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:40,234 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:33:40,234 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:33:40,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1306.3ms TimeCoverageRelationStatistics Valid=1102, Invalid=1868, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:33:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:33:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 23:33:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 23:33:40,240 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2021-05-02 23:33:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:40,240 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 23:33:40,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 23:33:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:33:40,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:40,240 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:40,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:33:40,241 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:40,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1234747866, now seen corresponding path program 15 times [2021-05-02 23:33:40,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:40,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657240] [2021-05-02 23:33:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:40,248 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_298 50) InVars {main_~main__x~0=v_main_~main__x~0_298} OutVars{main_~main__x~0=v_main_~main__x~0_298} AuxVars[] AssignedVars[] [2021-05-02 23:33:40,249 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:40,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:40,258 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:40,264 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:40,276 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_300) (< v_main_~main__x~0_300 100)) InVars {main_~main__x~0=v_main_~main__x~0_300} OutVars{main_~main__x~0=v_main_~main__x~0_300} AuxVars[] AssignedVars[] [2021-05-02 23:33:40,278 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:40,287 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:40,289 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:40,297 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:40,298 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:40,309 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:40,323 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:40,324 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_302 99) (< v_main_~main__x~0_302 50)) InVars {main_~main__x~0=v_main_~main__x~0_302} OutVars{main_~main__x~0=v_main_~main__x~0_302} AuxVars[] AssignedVars[] [2021-05-02 23:33:40,326 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:40,331 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:40,334 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:40,343 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:40,351 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:40,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:40,546 INFO 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 23:33:40,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:40,959 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:40,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657240] [2021-05-02 23:33:40,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:40,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:40,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:33:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662505903] [2021-05-02 23:33:40,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:33:40,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:33:40,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:33:40,960 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:42,037 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-02 23:33:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:33:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 23:33:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:42,038 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:33:42,038 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:33:42,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1383.5ms TimeCoverageRelationStatistics Valid=1154, Invalid=2038, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:33:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:33:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 23:33:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-02 23:33:42,045 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2021-05-02 23:33:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:42,045 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-02 23:33:42,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-02 23:33:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:33:42,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:42,046 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:42,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:33:42,046 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1088299895, now seen corresponding path program 16 times [2021-05-02 23:33:42,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:42,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777534203] [2021-05-02 23:33:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:42,054 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_322 50) InVars {main_~main__x~0=v_main_~main__x~0_322} OutVars{main_~main__x~0=v_main_~main__x~0_322} AuxVars[] AssignedVars[] [2021-05-02 23:33:42,055 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:42,056 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:42,060 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:42,070 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:42,080 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_324) (< v_main_~main__x~0_324 100)) InVars {main_~main__x~0=v_main_~main__x~0_324} OutVars{main_~main__x~0=v_main_~main__x~0_324} AuxVars[] AssignedVars[] [2021-05-02 23:33:42,082 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:42,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:42,094 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:42,102 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:42,108 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:42,121 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:42,144 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:42,145 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_326 50) (< v_main_~main__x~0_326 99)) InVars {main_~main__x~0=v_main_~main__x~0_326} OutVars{main_~main__x~0=v_main_~main__x~0_326} AuxVars[] AssignedVars[] [2021-05-02 23:33:42,159 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:42,164 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:42,169 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:42,175 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:42,183 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:42,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:42,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:42,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:42,791 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:42,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777534203] [2021-05-02 23:33:42,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777534203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:42,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:42,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:33:42,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985356686] [2021-05-02 23:33:42,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:33:42,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:33:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=603, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:33:42,792 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:43,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:43,912 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-05-02 23:33:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:33:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-02 23:33:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:43,917 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:33:43,918 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:33:43,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1444.7ms TimeCoverageRelationStatistics Valid=1269, Invalid=2153, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:33:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:33:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 23:33:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-02 23:33:43,924 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2021-05-02 23:33:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:43,924 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-02 23:33:43,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-02 23:33:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:33:43,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:43,924 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:43,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:33:43,925 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2085720532, now seen corresponding path program 17 times [2021-05-02 23:33:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:43,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392477707] [2021-05-02 23:33:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:43,929 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_347 50) InVars {main_~main__x~0=v_main_~main__x~0_347} OutVars{main_~main__x~0=v_main_~main__x~0_347} AuxVars[] AssignedVars[] [2021-05-02 23:33:43,930 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:43,935 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:43,938 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:43,943 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:43,952 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_349) (< v_main_~main__x~0_349 100)) InVars {main_~main__x~0=v_main_~main__x~0_349} OutVars{main_~main__x~0=v_main_~main__x~0_349} AuxVars[] AssignedVars[] [2021-05-02 23:33:43,955 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:43,975 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:43,977 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:43,986 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:43,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:43,999 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:44,013 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:44,014 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_351 99) (< v_main_~main__x~0_351 50)) InVars {main_~main__x~0=v_main_~main__x~0_351} OutVars{main_~main__x~0=v_main_~main__x~0_351} AuxVars[] AssignedVars[] [2021-05-02 23:33:44,016 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:44,024 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:44,028 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:44,034 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:44,041 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:44,210 INFO 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 23:33:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:44,665 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:44,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392477707] [2021-05-02 23:33:44,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [392477707] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:44,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:44,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:33:44,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147283896] [2021-05-02 23:33:44,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:33:44,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:44,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:33:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=656, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:33:44,667 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:45,809 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-05-02 23:33:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:33:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 23:33:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:45,810 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:33:45,810 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:33:45,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1509.7ms TimeCoverageRelationStatistics Valid=1323, Invalid=2337, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:33:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:33:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 23:33:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-02 23:33:45,817 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 63 [2021-05-02 23:33:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:45,817 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-02 23:33:45,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-02 23:33:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:33:45,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:45,817 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:45,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:33:45,818 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1465721615, now seen corresponding path program 18 times [2021-05-02 23:33:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:45,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094511268] [2021-05-02 23:33:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:45,827 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_373 50) InVars {main_~main__x~0=v_main_~main__x~0_373} OutVars{main_~main__x~0=v_main_~main__x~0_373} AuxVars[] AssignedVars[] [2021-05-02 23:33:45,828 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:45,829 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:45,833 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:45,842 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:45,852 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_375 100) (<= 50 v_main_~main__x~0_375)) InVars {main_~main__x~0=v_main_~main__x~0_375} OutVars{main_~main__x~0=v_main_~main__x~0_375} AuxVars[] AssignedVars[] [2021-05-02 23:33:45,853 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:45,866 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:45,867 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:45,878 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:45,879 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:45,890 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:45,903 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:45,904 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_377 50) (< v_main_~main__x~0_377 99)) InVars {main_~main__x~0=v_main_~main__x~0_377} OutVars{main_~main__x~0=v_main_~main__x~0_377} AuxVars[] AssignedVars[] [2021-05-02 23:33:45,908 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:45,908 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:45,912 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:45,921 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:45,929 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:46,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:46,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:46,604 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094511268] [2021-05-02 23:33:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094511268] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:46,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:46,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:33:46,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135177096] [2021-05-02 23:33:46,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:33:46,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:33:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=676, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:33:46,606 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:47,799 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-05-02 23:33:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:33:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 23:33:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:47,800 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:33:47,800 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:33:47,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1616.7ms TimeCoverageRelationStatistics Valid=1448, Invalid=2458, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:33:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:33:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 23:33:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 23:33:47,807 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2021-05-02 23:33:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:47,807 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 23:33:47,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 23:33:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:33:47,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:47,807 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:47,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:33:47,807 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash 97375438, now seen corresponding path program 19 times [2021-05-02 23:33:47,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:47,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405378202] [2021-05-02 23:33:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:47,821 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_400 50) InVars {main_~main__x~0=v_main_~main__x~0_400} OutVars{main_~main__x~0=v_main_~main__x~0_400} AuxVars[] AssignedVars[] [2021-05-02 23:33:47,822 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:47,828 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:47,832 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:47,837 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:47,850 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_402) (< v_main_~main__x~0_402 100)) InVars {main_~main__x~0=v_main_~main__x~0_402} OutVars{main_~main__x~0=v_main_~main__x~0_402} AuxVars[] AssignedVars[] [2021-05-02 23:33:47,852 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:47,853 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:47,854 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:47,862 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:47,864 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:47,883 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:47,899 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:47,901 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_404 99) (< v_main_~main__x~0_404 50)) InVars {main_~main__x~0=v_main_~main__x~0_404} OutVars{main_~main__x~0=v_main_~main__x~0_404} AuxVars[] AssignedVars[] [2021-05-02 23:33:47,902 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:47,903 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:47,906 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:47,915 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:47,923 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:48,087 INFO 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 23:33:48,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:48,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:48,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:48,625 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:48,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405378202] [2021-05-02 23:33:48,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405378202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:48,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:48,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:33:48,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223191699] [2021-05-02 23:33:48,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:33:48,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:33:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=714, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:33:48,627 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:49,875 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-02 23:33:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:33:49,876 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-02 23:33:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:49,877 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:33:49,877 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 23:33:49,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1726.7ms TimeCoverageRelationStatistics Valid=1542, Invalid=2618, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:33:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 23:33:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 23:33:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-02 23:33:49,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2021-05-02 23:33:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:49,884 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-02 23:33:49,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-02 23:33:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:33:49,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:49,884 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:49,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:33:49,885 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1004910229, now seen corresponding path program 20 times [2021-05-02 23:33:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:49,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135883297] [2021-05-02 23:33:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:49,889 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_428 50) InVars {main_~main__x~0=v_main_~main__x~0_428} OutVars{main_~main__x~0=v_main_~main__x~0_428} AuxVars[] AssignedVars[] [2021-05-02 23:33:49,890 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:49,891 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:49,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:49,904 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:49,916 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_430 100) (<= 50 v_main_~main__x~0_430)) InVars {main_~main__x~0=v_main_~main__x~0_430} OutVars{main_~main__x~0=v_main_~main__x~0_430} AuxVars[] AssignedVars[] [2021-05-02 23:33:49,917 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:49,927 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:49,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:49,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:49,939 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:49,951 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:49,965 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:49,967 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_432 99) (< v_main_~main__x~0_432 50)) InVars {main_~main__x~0=v_main_~main__x~0_432} OutVars{main_~main__x~0=v_main_~main__x~0_432} AuxVars[] AssignedVars[] [2021-05-02 23:33:49,968 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:49,973 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:49,977 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:49,982 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:49,990 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:50,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:50,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:50,711 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:50,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135883297] [2021-05-02 23:33:50,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1135883297] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:50,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:50,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:33:50,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743821438] [2021-05-02 23:33:50,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:33:50,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:50,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:33:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:33:50,713 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:52,025 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-05-02 23:33:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:33:52,025 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 23:33:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:52,026 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:33:52,026 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:33:52,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1790.9ms TimeCoverageRelationStatistics Valid=1639, Invalid=2783, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:33:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:33:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 23:33:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-05-02 23:33:52,032 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2021-05-02 23:33:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:52,032 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-05-02 23:33:52,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-05-02 23:33:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:33:52,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:52,033 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:52,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:33:52,033 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 555485896, now seen corresponding path program 21 times [2021-05-02 23:33:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:52,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956758405] [2021-05-02 23:33:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:52,037 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_457 50) InVars {main_~main__x~0=v_main_~main__x~0_457} OutVars{main_~main__x~0=v_main_~main__x~0_457} AuxVars[] AssignedVars[] [2021-05-02 23:33:52,038 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:52,040 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:52,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:52,054 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:52,064 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_459 100) (<= 50 v_main_~main__x~0_459)) InVars {main_~main__x~0=v_main_~main__x~0_459} OutVars{main_~main__x~0=v_main_~main__x~0_459} AuxVars[] AssignedVars[] [2021-05-02 23:33:52,069 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:52,081 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:52,083 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:52,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:52,093 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:52,104 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:52,117 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:52,119 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_461 50) (< v_main_~main__x~0_461 99)) InVars {main_~main__x~0=v_main_~main__x~0_461} OutVars{main_~main__x~0=v_main_~main__x~0_461} AuxVars[] AssignedVars[] [2021-05-02 23:33:52,121 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:52,138 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:52,143 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:52,149 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:52,157 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:52,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:52,334 INFO 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 23:33:52,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:52,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:52,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:52,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956758405] [2021-05-02 23:33:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [956758405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:52,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:52,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:33:52,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873551434] [2021-05-02 23:33:52,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:33:52,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:33:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=793, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:33:52,919 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:54,317 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-05-02 23:33:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:33:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 23:33:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:54,318 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:33:54,318 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:33:54,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1884.5ms TimeCoverageRelationStatistics Valid=1739, Invalid=2953, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:33:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:33:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 23:33:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-02 23:33:54,324 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2021-05-02 23:33:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:54,324 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-02 23:33:54,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-02 23:33:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:33:54,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:54,325 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:54,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:33:54,325 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1152575717, now seen corresponding path program 22 times [2021-05-02 23:33:54,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:54,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570133155] [2021-05-02 23:33:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:54,330 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_487 50) InVars {main_~main__x~0=v_main_~main__x~0_487} OutVars{main_~main__x~0=v_main_~main__x~0_487} AuxVars[] AssignedVars[] [2021-05-02 23:33:54,331 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:54,332 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:54,335 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:54,344 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:54,369 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_489 100) (<= 50 v_main_~main__x~0_489)) InVars {main_~main__x~0=v_main_~main__x~0_489} OutVars{main_~main__x~0=v_main_~main__x~0_489} AuxVars[] AssignedVars[] [2021-05-02 23:33:54,371 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:54,382 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:54,384 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:54,393 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:54,395 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:54,406 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:54,420 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:54,423 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_491 50) (< v_main_~main__x~0_491 99)) InVars {main_~main__x~0=v_main_~main__x~0_491} OutVars{main_~main__x~0=v_main_~main__x~0_491} AuxVars[] AssignedVars[] [2021-05-02 23:33:54,424 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:54,425 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:54,428 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:54,438 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:54,448 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:54,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:54,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:54,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:54,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:55,241 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570133155] [2021-05-02 23:33:55,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570133155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:55,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:55,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:33:55,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107796823] [2021-05-02 23:33:55,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:33:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:33:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=834, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:33:55,242 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:56,746 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-05-02 23:33:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:33:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 23:33:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:56,747 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:33:56,747 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:33:56,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1986.5ms TimeCoverageRelationStatistics Valid=1842, Invalid=3128, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:33:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:33:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 23:33:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 23:33:56,754 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2021-05-02 23:33:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:56,754 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 23:33:56,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 23:33:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:33:56,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:56,755 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:56,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:33:56,755 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash -569723966, now seen corresponding path program 23 times [2021-05-02 23:33:56,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:56,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503160250] [2021-05-02 23:33:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:56,759 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_518 50) InVars {main_~main__x~0=v_main_~main__x~0_518} OutVars{main_~main__x~0=v_main_~main__x~0_518} AuxVars[] AssignedVars[] [2021-05-02 23:33:56,760 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:56,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:56,769 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:56,774 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:56,785 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_520) (< v_main_~main__x~0_520 100)) InVars {main_~main__x~0=v_main_~main__x~0_520} OutVars{main_~main__x~0=v_main_~main__x~0_520} AuxVars[] AssignedVars[] [2021-05-02 23:33:56,786 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:56,796 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:56,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:56,815 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:56,817 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:56,829 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:56,843 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:56,850 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_522 50) (< v_main_~main__x~0_522 99)) InVars {main_~main__x~0=v_main_~main__x~0_522} OutVars{main_~main__x~0=v_main_~main__x~0_522} AuxVars[] AssignedVars[] [2021-05-02 23:33:56,851 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:56,857 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:56,860 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:56,866 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:56,873 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:57,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:57,037 INFO 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 23:33:57,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:57,691 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:57,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503160250] [2021-05-02 23:33:57,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [503160250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:57,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:57,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:33:57,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947247518] [2021-05-02 23:33:57,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:33:57,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:33:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=876, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:33:57,692 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:59,199 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-02 23:33:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:33:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:33:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:59,200 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:33:59,200 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:33:59,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2025.2ms TimeCoverageRelationStatistics Valid=1948, Invalid=3308, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:33:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:33:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 23:33:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-02 23:33:59,210 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2021-05-02 23:33:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:59,210 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-02 23:33:59,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-02 23:33:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:33:59,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:59,211 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:59,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:33:59,211 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2137310369, now seen corresponding path program 24 times [2021-05-02 23:33:59,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:59,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171228722] [2021-05-02 23:33:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:59,215 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_550 50) InVars {main_~main__x~0=v_main_~main__x~0_550} OutVars{main_~main__x~0=v_main_~main__x~0_550} AuxVars[] AssignedVars[] [2021-05-02 23:33:59,216 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:33:59,217 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:59,220 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:59,229 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:33:59,238 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_552 100) (<= 50 v_main_~main__x~0_552)) InVars {main_~main__x~0=v_main_~main__x~0_552} OutVars{main_~main__x~0=v_main_~main__x~0_552} AuxVars[] AssignedVars[] [2021-05-02 23:33:59,240 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:33:59,248 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:59,250 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:59,259 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:33:59,260 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:33:59,271 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:33:59,285 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:59,286 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_554 50) (< v_main_~main__x~0_554 99)) InVars {main_~main__x~0=v_main_~main__x~0_554} OutVars{main_~main__x~0=v_main_~main__x~0_554} AuxVars[] AssignedVars[] [2021-05-02 23:33:59,287 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:33:59,288 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:59,291 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:33:59,301 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:33:59,308 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:33:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:59,475 INFO 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 23:33:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:59,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:33:59,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:00,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:00,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171228722] [2021-05-02 23:34:00,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171228722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:00,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:00,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:34:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718470481] [2021-05-02 23:34:00,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:34:00,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:34:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=919, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:34:00,190 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:01,784 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-05-02 23:34:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:34:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 23:34:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:01,785 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:34:01,785 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:34:01,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 2176.9ms TimeCoverageRelationStatistics Valid=2057, Invalid=3493, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:34:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:34:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 23:34:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-02 23:34:01,792 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2021-05-02 23:34:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:01,792 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-02 23:34:01,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-02 23:34:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:34:01,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:01,793 INFO L523 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:01,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:34:01,793 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1054322756, now seen corresponding path program 25 times [2021-05-02 23:34:01,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:01,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558357596] [2021-05-02 23:34:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:01,802 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_583 50) InVars {main_~main__x~0=v_main_~main__x~0_583} OutVars{main_~main__x~0=v_main_~main__x~0_583} AuxVars[] AssignedVars[] [2021-05-02 23:34:01,803 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:01,808 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:01,812 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:01,817 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:01,829 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_585 100) (<= 50 v_main_~main__x~0_585)) InVars {main_~main__x~0=v_main_~main__x~0_585} OutVars{main_~main__x~0=v_main_~main__x~0_585} AuxVars[] AssignedVars[] [2021-05-02 23:34:01,833 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:01,834 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:01,835 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:01,844 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:01,846 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:01,866 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:01,880 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:01,881 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_587 50) (< v_main_~main__x~0_587 99)) InVars {main_~main__x~0=v_main_~main__x~0_587} OutVars{main_~main__x~0=v_main_~main__x~0_587} AuxVars[] AssignedVars[] [2021-05-02 23:34:01,882 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:01,883 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:01,886 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:01,896 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:01,904 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:02,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:02,815 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558357596] [2021-05-02 23:34:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558357596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:02,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:02,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:34:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653330079] [2021-05-02 23:34:02,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:34:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:34:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=988, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:34:02,816 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:04,485 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-05-02 23:34:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:34:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 23:34:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:04,487 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:34:04,488 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 23:34:04,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2276.9ms TimeCoverageRelationStatistics Valid=2119, Invalid=3733, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:34:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 23:34:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 23:34:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-02 23:34:04,495 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 79 [2021-05-02 23:34:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:04,495 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-02 23:34:04,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-02 23:34:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:34:04,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:04,496 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:04,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:34:04,496 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:04,496 INFO L82 PathProgramCache]: Analyzing trace with hash 314687705, now seen corresponding path program 26 times [2021-05-02 23:34:04,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:04,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892068569] [2021-05-02 23:34:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:04,504 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_617 50) InVars {main_~main__x~0=v_main_~main__x~0_617} OutVars{main_~main__x~0=v_main_~main__x~0_617} AuxVars[] AssignedVars[] [2021-05-02 23:34:04,505 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:04,510 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:04,515 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:04,520 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:04,530 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_619 100) (<= 50 v_main_~main__x~0_619)) InVars {main_~main__x~0=v_main_~main__x~0_619} OutVars{main_~main__x~0=v_main_~main__x~0_619} AuxVars[] AssignedVars[] [2021-05-02 23:34:04,531 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:04,544 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:04,546 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:04,554 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:04,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:04,568 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:04,583 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:04,584 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_621 50) (< v_main_~main__x~0_621 99)) InVars {main_~main__x~0=v_main_~main__x~0_621} OutVars{main_~main__x~0=v_main_~main__x~0_621} AuxVars[] AssignedVars[] [2021-05-02 23:34:04,585 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:04,590 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:04,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:04,600 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:04,608 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:04,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:04,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:04,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:05,567 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:05,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892068569] [2021-05-02 23:34:05,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892068569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:05,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:05,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:34:05,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186367007] [2021-05-02 23:34:05,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:34:05,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:34:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=798, Invalid=1008, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:34:05,569 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.95) internal successors, (78), 39 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:07,330 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-05-02 23:34:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:34:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.95) internal successors, (78), 39 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 23:34:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:07,331 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:34:07,331 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:34:07,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 2430.5ms TimeCoverageRelationStatistics Valid=2284, Invalid=3878, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:34:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:34:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 23:34:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 23:34:07,338 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2021-05-02 23:34:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:07,338 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 23:34:07,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.95) internal successors, (78), 39 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 23:34:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:34:07,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:07,339 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:07,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:34:07,339 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1673748150, now seen corresponding path program 27 times [2021-05-02 23:34:07,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:07,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959139763] [2021-05-02 23:34:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:07,345 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_652 50) InVars {main_~main__x~0=v_main_~main__x~0_652} OutVars{main_~main__x~0=v_main_~main__x~0_652} AuxVars[] AssignedVars[] [2021-05-02 23:34:07,346 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:07,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:07,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:07,361 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:07,372 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_654) (< v_main_~main__x~0_654 100)) InVars {main_~main__x~0=v_main_~main__x~0_654} OutVars{main_~main__x~0=v_main_~main__x~0_654} AuxVars[] AssignedVars[] [2021-05-02 23:34:07,374 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:07,385 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:07,387 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:07,395 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:07,402 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:07,415 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:07,430 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:07,431 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_656 99) (< v_main_~main__x~0_656 50)) InVars {main_~main__x~0=v_main_~main__x~0_656} OutVars{main_~main__x~0=v_main_~main__x~0_656} AuxVars[] AssignedVars[] [2021-05-02 23:34:07,432 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:07,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:07,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:07,469 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:07,477 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:07,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:07,669 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 23:34:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:07,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:08,477 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959139763] [2021-05-02 23:34:08,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959139763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:08,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:08,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:34:08,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912609427] [2021-05-02 23:34:08,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:34:08,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:34:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=1081, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:34:08,479 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:10,289 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-02 23:34:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:34:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:34:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:10,290 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:34:10,290 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:34:10,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2479.0ms TimeCoverageRelationStatistics Valid=2348, Invalid=4132, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:34:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:34:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 23:34:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-05-02 23:34:10,297 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2021-05-02 23:34:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:10,297 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-05-02 23:34:10,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-05-02 23:34:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:34:10,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:10,298 INFO L523 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:10,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:34:10,298 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2060777811, now seen corresponding path program 28 times [2021-05-02 23:34:10,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:10,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708958201] [2021-05-02 23:34:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:10,306 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_688 50) InVars {main_~main__x~0=v_main_~main__x~0_688} OutVars{main_~main__x~0=v_main_~main__x~0_688} AuxVars[] AssignedVars[] [2021-05-02 23:34:10,307 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:10,312 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:10,315 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:10,321 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:10,331 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_690) (< v_main_~main__x~0_690 100)) InVars {main_~main__x~0=v_main_~main__x~0_690} OutVars{main_~main__x~0=v_main_~main__x~0_690} AuxVars[] AssignedVars[] [2021-05-02 23:34:10,333 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:10,343 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:10,344 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:10,353 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:10,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:10,366 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:10,381 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:10,382 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_692 99) (< v_main_~main__x~0_692 50)) InVars {main_~main__x~0=v_main_~main__x~0_692} OutVars{main_~main__x~0=v_main_~main__x~0_692} AuxVars[] AssignedVars[] [2021-05-02 23:34:10,392 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:10,393 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:10,398 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:10,408 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:10,418 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:10,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:10,585 INFO 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 23:34:10,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:10,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:10,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:11,407 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:11,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708958201] [2021-05-02 23:34:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708958201] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:11,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:11,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:34:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457360326] [2021-05-02 23:34:11,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:34:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:34:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=1101, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:34:11,408 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:13,248 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-05-02 23:34:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:34:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 23:34:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:13,249 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:34:13,249 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:34:13,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2533.6ms TimeCoverageRelationStatistics Valid=2523, Invalid=4283, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:34:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:34:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 23:34:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-05-02 23:34:13,256 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2021-05-02 23:34:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:13,256 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-05-02 23:34:13,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-05-02 23:34:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:34:13,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:13,257 INFO L523 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:13,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:34:13,257 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 334127280, now seen corresponding path program 29 times [2021-05-02 23:34:13,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:13,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752471668] [2021-05-02 23:34:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:13,263 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_725 50) InVars {main_~main__x~0=v_main_~main__x~0_725} OutVars{main_~main__x~0=v_main_~main__x~0_725} AuxVars[] AssignedVars[] [2021-05-02 23:34:13,264 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:13,268 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:13,271 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:13,276 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:13,285 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_727 100) (<= 50 v_main_~main__x~0_727)) InVars {main_~main__x~0=v_main_~main__x~0_727} OutVars{main_~main__x~0=v_main_~main__x~0_727} AuxVars[] AssignedVars[] [2021-05-02 23:34:13,286 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:13,295 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:13,296 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:13,303 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:13,305 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:13,315 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:13,328 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:13,329 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_729 50) (< v_main_~main__x~0_729 99)) InVars {main_~main__x~0=v_main_~main__x~0_729} OutVars{main_~main__x~0=v_main_~main__x~0_729} AuxVars[] AssignedVars[] [2021-05-02 23:34:13,330 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:13,330 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:13,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:13,346 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:13,354 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:13,528 INFO 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 23:34:13,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:13,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:13,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:14,410 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:14,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752471668] [2021-05-02 23:34:14,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752471668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:14,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:14,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:34:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307445717] [2021-05-02 23:34:14,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:34:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:34:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=921, Invalid=1149, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:34:14,412 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:16,325 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-05-02 23:34:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:34:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 23:34:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:16,326 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:34:16,326 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 23:34:16,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2707.1ms TimeCoverageRelationStatistics Valid=2647, Invalid=4493, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:34:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 23:34:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-02 23:34:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-02 23:34:16,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 87 [2021-05-02 23:34:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:16,334 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-02 23:34:16,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-02 23:34:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:34:16,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:16,335 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:16,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:34:16,335 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1119656755, now seen corresponding path program 30 times [2021-05-02 23:34:16,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:16,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020196455] [2021-05-02 23:34:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:16,340 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_763 50) InVars {main_~main__x~0=v_main_~main__x~0_763} OutVars{main_~main__x~0=v_main_~main__x~0_763} AuxVars[] AssignedVars[] [2021-05-02 23:34:16,341 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:16,341 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:16,345 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:16,355 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:16,364 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_765) (< v_main_~main__x~0_765 100)) InVars {main_~main__x~0=v_main_~main__x~0_765} OutVars{main_~main__x~0=v_main_~main__x~0_765} AuxVars[] AssignedVars[] [2021-05-02 23:34:16,365 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:16,377 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:16,378 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:16,394 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:16,396 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:16,407 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:16,421 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:16,422 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_767 50) (< v_main_~main__x~0_767 99)) InVars {main_~main__x~0=v_main_~main__x~0_767} OutVars{main_~main__x~0=v_main_~main__x~0_767} AuxVars[] AssignedVars[] [2021-05-02 23:34:16,428 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:16,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:16,433 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:16,442 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:16,453 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:16,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:16,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:16,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:17,543 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020196455] [2021-05-02 23:34:17,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020196455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:17,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:17,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:34:17,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663702659] [2021-05-02 23:34:17,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:34:17,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:34:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=1198, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:34:17,545 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:19,658 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-05-02 23:34:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:34:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 23:34:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:19,659 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:34:19,659 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:34:19,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 2847.7ms TimeCoverageRelationStatistics Valid=2774, Invalid=4708, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:34:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:34:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 23:34:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 23:34:19,668 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2021-05-02 23:34:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:19,668 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 23:34:19,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 23:34:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:34:19,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:19,669 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:19,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:34:19,669 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1953224106, now seen corresponding path program 31 times [2021-05-02 23:34:19,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:19,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670287684] [2021-05-02 23:34:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:19,674 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_802 50) InVars {main_~main__x~0=v_main_~main__x~0_802} OutVars{main_~main__x~0=v_main_~main__x~0_802} AuxVars[] AssignedVars[] [2021-05-02 23:34:19,675 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:19,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:19,679 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:19,689 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:19,699 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_804 100) (<= 50 v_main_~main__x~0_804)) InVars {main_~main__x~0=v_main_~main__x~0_804} OutVars{main_~main__x~0=v_main_~main__x~0_804} AuxVars[] AssignedVars[] [2021-05-02 23:34:19,701 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:19,701 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:19,703 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:19,711 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:19,713 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:19,734 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:19,748 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:19,750 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_806 50) (< v_main_~main__x~0_806 99)) InVars {main_~main__x~0=v_main_~main__x~0_806} OutVars{main_~main__x~0=v_main_~main__x~0_806} AuxVars[] AssignedVars[] [2021-05-02 23:34:19,751 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:19,751 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:19,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:19,778 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:19,787 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:19,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:19,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:20,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:20,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:20,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670287684] [2021-05-02 23:34:20,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [670287684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:20,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:20,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:34:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666490780] [2021-05-02 23:34:20,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:34:20,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:20,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:34:20,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1008, Invalid=1248, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:34:20,965 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:23,096 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-02 23:34:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:34:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 23:34:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:23,097 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:34:23,097 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 23:34:23,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2930.5ms TimeCoverageRelationStatistics Valid=2904, Invalid=4928, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:34:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 23:34:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 23:34:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-02 23:34:23,105 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 91 [2021-05-02 23:34:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:23,105 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-02 23:34:23,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-02 23:34:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:34:23,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:23,106 INFO L523 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:23,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:34:23,106 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash 54231879, now seen corresponding path program 32 times [2021-05-02 23:34:23,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:23,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721434946] [2021-05-02 23:34:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:23,114 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_842 50) InVars {main_~main__x~0=v_main_~main__x~0_842} OutVars{main_~main__x~0=v_main_~main__x~0_842} AuxVars[] AssignedVars[] [2021-05-02 23:34:23,115 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:23,116 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:23,120 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:23,130 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:23,140 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_844) (< v_main_~main__x~0_844 100)) InVars {main_~main__x~0=v_main_~main__x~0_844} OutVars{main_~main__x~0=v_main_~main__x~0_844} AuxVars[] AssignedVars[] [2021-05-02 23:34:23,145 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:23,146 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:23,147 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:23,157 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:23,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:23,179 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:23,197 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:23,198 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_846 99) (< v_main_~main__x~0_846 50)) InVars {main_~main__x~0=v_main_~main__x~0_846} OutVars{main_~main__x~0=v_main_~main__x~0_846} AuxVars[] AssignedVars[] [2021-05-02 23:34:23,199 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:23,200 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:23,204 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:23,215 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:23,223 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:23,393 INFO 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 23:34:23,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:23,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:24,468 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721434946] [2021-05-02 23:34:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [721434946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:24,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:24,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:34:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197778431] [2021-05-02 23:34:24,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:34:24,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:34:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=1299, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:34:24,469 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:26,692 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2021-05-02 23:34:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:34:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:34:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:26,694 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:34:26,694 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:34:26,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 3136.8ms TimeCoverageRelationStatistics Valid=3037, Invalid=5153, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:34:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:34:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-02 23:34:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-05-02 23:34:26,702 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2021-05-02 23:34:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:26,702 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-05-02 23:34:26,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-05-02 23:34:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:34:26,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:26,703 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:26,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:34:26,703 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash 483802532, now seen corresponding path program 33 times [2021-05-02 23:34:26,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:26,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310559952] [2021-05-02 23:34:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:26,708 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_883 50) InVars {main_~main__x~0=v_main_~main__x~0_883} OutVars{main_~main__x~0=v_main_~main__x~0_883} AuxVars[] AssignedVars[] [2021-05-02 23:34:26,709 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:26,710 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:26,714 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:26,724 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:26,734 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_885 100) (<= 50 v_main_~main__x~0_885)) InVars {main_~main__x~0=v_main_~main__x~0_885} OutVars{main_~main__x~0=v_main_~main__x~0_885} AuxVars[] AssignedVars[] [2021-05-02 23:34:26,736 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:26,746 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:26,747 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:26,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:26,757 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:26,768 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:26,782 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:26,783 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_887 99) (< v_main_~main__x~0_887 50)) InVars {main_~main__x~0=v_main_~main__x~0_887} OutVars{main_~main__x~0=v_main_~main__x~0_887} AuxVars[] AssignedVars[] [2021-05-02 23:34:26,784 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:26,785 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:26,793 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:26,802 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:26,811 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:26,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:26,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:26,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:27,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:28,059 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310559952] [2021-05-02 23:34:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [310559952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:28,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:28,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:34:28,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476757156] [2021-05-02 23:34:28,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:34:28,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:34:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=1351, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:34:28,063 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:30,355 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-05-02 23:34:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:34:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:34:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:30,360 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:34:30,360 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 23:34:30,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 3149.2ms TimeCoverageRelationStatistics Valid=3173, Invalid=5383, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:34:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 23:34:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 23:34:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-05-02 23:34:30,368 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2021-05-02 23:34:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:30,368 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-05-02 23:34:30,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-05-02 23:34:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:34:30,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:30,369 INFO L523 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:30,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:34:30,369 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash 984339649, now seen corresponding path program 34 times [2021-05-02 23:34:30,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:30,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507300019] [2021-05-02 23:34:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:30,374 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_925 50) InVars {main_~main__x~0=v_main_~main__x~0_925} OutVars{main_~main__x~0=v_main_~main__x~0_925} AuxVars[] AssignedVars[] [2021-05-02 23:34:30,375 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:30,376 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:30,380 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:30,390 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:30,400 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_927) (< v_main_~main__x~0_927 100)) InVars {main_~main__x~0=v_main_~main__x~0_927} OutVars{main_~main__x~0=v_main_~main__x~0_927} AuxVars[] AssignedVars[] [2021-05-02 23:34:30,402 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:30,412 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:30,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:30,424 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:30,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:30,438 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:30,452 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:30,453 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_929 50) (< v_main_~main__x~0_929 99)) InVars {main_~main__x~0=v_main_~main__x~0_929} OutVars{main_~main__x~0=v_main_~main__x~0_929} AuxVars[] AssignedVars[] [2021-05-02 23:34:30,467 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:30,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:30,472 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:30,483 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:30,492 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:30,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:30,681 INFO 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 23:34:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:30,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:31,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:31,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507300019] [2021-05-02 23:34:31,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [507300019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:31,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:31,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:34:31,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030486875] [2021-05-02 23:34:31,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:34:31,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:31,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:34:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1146, Invalid=1404, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:34:31,822 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 48 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 47 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:34,252 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-05-02 23:34:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:34:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 47 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-02 23:34:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:34,253 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:34:34,253 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:34:34,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 3371.2ms TimeCoverageRelationStatistics Valid=3312, Invalid=5618, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:34:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:34:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 23:34:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 23:34:34,262 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2021-05-02 23:34:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:34,262 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 23:34:34,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 47 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 23:34:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:34:34,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:34,262 INFO L523 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:34,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:34:34,262 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash 964171934, now seen corresponding path program 35 times [2021-05-02 23:34:34,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:34,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016868883] [2021-05-02 23:34:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:34,277 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_968 50) InVars {main_~main__x~0=v_main_~main__x~0_968} OutVars{main_~main__x~0=v_main_~main__x~0_968} AuxVars[] AssignedVars[] [2021-05-02 23:34:34,279 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:34,279 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:34,283 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:34,293 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:34,303 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_970) (< v_main_~main__x~0_970 100)) InVars {main_~main__x~0=v_main_~main__x~0_970} OutVars{main_~main__x~0=v_main_~main__x~0_970} AuxVars[] AssignedVars[] [2021-05-02 23:34:34,305 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:34,315 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:34,320 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:34,328 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:34,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:34,343 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:34,357 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:34,359 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_972 50) (< v_main_~main__x~0_972 99)) InVars {main_~main__x~0=v_main_~main__x~0_972} OutVars{main_~main__x~0=v_main_~main__x~0_972} AuxVars[] AssignedVars[] [2021-05-02 23:34:34,361 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:34,362 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:34,366 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:34,376 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:34,384 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:34,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:34,568 INFO 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 23:34:34,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:35,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016868883] [2021-05-02 23:34:35,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016868883] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:35,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:35,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:34:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445218475] [2021-05-02 23:34:35,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:34:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:34:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=1458, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:34:35,728 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:38,276 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-02 23:34:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:34:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:34:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:38,277 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:34:38,278 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:34:38,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 3521.3ms TimeCoverageRelationStatistics Valid=3454, Invalid=5858, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:34:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:34:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 23:34:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-05-02 23:34:38,286 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2021-05-02 23:34:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:38,286 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-05-02 23:34:38,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-05-02 23:34:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:34:38,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:38,287 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:38,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:34:38,287 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1237132997, now seen corresponding path program 36 times [2021-05-02 23:34:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:38,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251177155] [2021-05-02 23:34:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:38,293 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1012 50) InVars {main_~main__x~0=v_main_~main__x~0_1012} OutVars{main_~main__x~0=v_main_~main__x~0_1012} AuxVars[] AssignedVars[] [2021-05-02 23:34:38,294 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:38,309 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:38,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:38,319 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:38,329 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1014) (< v_main_~main__x~0_1014 100)) InVars {main_~main__x~0=v_main_~main__x~0_1014} OutVars{main_~main__x~0=v_main_~main__x~0_1014} AuxVars[] AssignedVars[] [2021-05-02 23:34:38,331 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:38,341 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:38,343 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:38,352 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:38,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:38,368 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:38,383 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:38,384 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1016 50) (< v_main_~main__x~0_1016 99)) InVars {main_~main__x~0=v_main_~main__x~0_1016} OutVars{main_~main__x~0=v_main_~main__x~0_1016} AuxVars[] AssignedVars[] [2021-05-02 23:34:38,385 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:38,386 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:38,392 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:38,402 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:38,411 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:38,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:38,586 INFO 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 23:34:38,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:38,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:38,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:39,796 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251177155] [2021-05-02 23:34:39,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1251177155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:39,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:39,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:34:39,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096069870] [2021-05-02 23:34:39,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:34:39,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:39,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:34:39,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=1513, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:34:39,798 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 50 states, 50 states have (on average 1.96) internal successors, (98), 49 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:42,374 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-05-02 23:34:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:34:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 49 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:34:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:42,375 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:34:42,375 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:34:42,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 3566.4ms TimeCoverageRelationStatistics Valid=3599, Invalid=6103, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:34:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:34:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-02 23:34:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-05-02 23:34:42,384 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2021-05-02 23:34:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:42,384 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-05-02 23:34:42,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 49 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-05-02 23:34:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:34:42,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:42,385 INFO L523 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:42,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:34:42,385 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 727705240, now seen corresponding path program 37 times [2021-05-02 23:34:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:42,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764159503] [2021-05-02 23:34:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:42,390 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1057 50) InVars {main_~main__x~0=v_main_~main__x~0_1057} OutVars{main_~main__x~0=v_main_~main__x~0_1057} AuxVars[] AssignedVars[] [2021-05-02 23:34:42,397 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:42,402 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:42,407 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:42,412 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:42,422 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1059 100) (<= 50 v_main_~main__x~0_1059)) InVars {main_~main__x~0=v_main_~main__x~0_1059} OutVars{main_~main__x~0=v_main_~main__x~0_1059} AuxVars[] AssignedVars[] [2021-05-02 23:34:42,423 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:42,424 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:42,426 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:42,434 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:42,436 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:42,455 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:42,470 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:42,473 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1061 50) (< v_main_~main__x~0_1061 99)) InVars {main_~main__x~0=v_main_~main__x~0_1061} OutVars{main_~main__x~0=v_main_~main__x~0_1061} AuxVars[] AssignedVars[] [2021-05-02 23:34:42,474 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:42,479 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:42,483 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:42,489 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:42,497 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:42,671 INFO 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 23:34:42,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:42,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:43,965 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:43,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764159503] [2021-05-02 23:34:43,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [764159503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:43,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:43,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:34:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791758589] [2021-05-02 23:34:43,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:34:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:34:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=1569, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:34:43,967 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:46,651 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-05-02 23:34:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:34:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:34:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:46,652 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:34:46,652 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:34:46,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 3732.9ms TimeCoverageRelationStatistics Valid=3747, Invalid=6353, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:34:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:34:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-02 23:34:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-05-02 23:34:46,662 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 103 [2021-05-02 23:34:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:46,662 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-05-02 23:34:46,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-05-02 23:34:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:34:46,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:46,662 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:46,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:34:46,663 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -848359243, now seen corresponding path program 38 times [2021-05-02 23:34:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:46,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65301841] [2021-05-02 23:34:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:46,672 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1103 50) InVars {main_~main__x~0=v_main_~main__x~0_1103} OutVars{main_~main__x~0=v_main_~main__x~0_1103} AuxVars[] AssignedVars[] [2021-05-02 23:34:46,673 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:46,674 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:46,678 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:46,687 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:46,698 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1105) (< v_main_~main__x~0_1105 100)) InVars {main_~main__x~0=v_main_~main__x~0_1105} OutVars{main_~main__x~0=v_main_~main__x~0_1105} AuxVars[] AssignedVars[] [2021-05-02 23:34:46,699 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:46,710 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:46,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:46,720 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:46,722 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:46,734 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:46,750 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:46,753 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1107 99) (< v_main_~main__x~0_1107 50)) InVars {main_~main__x~0=v_main_~main__x~0_1107} OutVars{main_~main__x~0=v_main_~main__x~0_1107} AuxVars[] AssignedVars[] [2021-05-02 23:34:46,754 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:46,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:46,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:46,773 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:46,783 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:46,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:46,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:46,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:46,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:48,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65301841] [2021-05-02 23:34:48,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [65301841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:48,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:48,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:34:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019512816] [2021-05-02 23:34:48,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:34:48,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:34:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1344, Invalid=1626, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:34:48,304 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 51 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:51,096 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-05-02 23:34:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:34:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 51 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 23:34:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:51,097 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:34:51,097 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:34:51,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3870.1ms TimeCoverageRelationStatistics Valid=3898, Invalid=6608, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:34:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:34:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 23:34:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 23:34:51,106 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2021-05-02 23:34:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:51,106 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 23:34:51,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 51 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 23:34:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 23:34:51,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:51,107 INFO L523 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:51,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:34:51,107 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 677128082, now seen corresponding path program 39 times [2021-05-02 23:34:51,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:51,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4094772] [2021-05-02 23:34:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:51,113 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1150 50) InVars {main_~main__x~0=v_main_~main__x~0_1150} OutVars{main_~main__x~0=v_main_~main__x~0_1150} AuxVars[] AssignedVars[] [2021-05-02 23:34:51,114 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:51,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:51,124 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:51,129 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:51,140 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1152) (< v_main_~main__x~0_1152 100)) InVars {main_~main__x~0=v_main_~main__x~0_1152} OutVars{main_~main__x~0=v_main_~main__x~0_1152} AuxVars[] AssignedVars[] [2021-05-02 23:34:51,141 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:51,142 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:51,144 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:51,153 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:51,155 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:51,175 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:51,191 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:51,192 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1154 50) (< v_main_~main__x~0_1154 99)) InVars {main_~main__x~0=v_main_~main__x~0_1154} OutVars{main_~main__x~0=v_main_~main__x~0_1154} AuxVars[] AssignedVars[] [2021-05-02 23:34:51,193 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:51,193 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:51,198 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:51,208 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:51,217 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:51,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:51,405 INFO 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 23:34:51,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:51,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:51,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:52,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:52,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4094772] [2021-05-02 23:34:52,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [4094772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:52,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:52,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:34:52,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832580182] [2021-05-02 23:34:52,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:34:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:34:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1396, Invalid=1684, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:34:52,782 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 52 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:55,621 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-02 23:34:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:34:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 52 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 23:34:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:55,622 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:34:55,622 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:34:55,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 4040.8ms TimeCoverageRelationStatistics Valid=4052, Invalid=6868, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:34:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:34:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 23:34:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-05-02 23:34:55,632 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2021-05-02 23:34:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:55,632 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-05-02 23:34:55,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 52 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:34:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-05-02 23:34:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 23:34:55,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:55,632 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:55,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:34:55,633 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2086599471, now seen corresponding path program 40 times [2021-05-02 23:34:55,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:55,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061979204] [2021-05-02 23:34:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:55,638 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1198 50) InVars {main_~main__x~0=v_main_~main__x~0_1198} OutVars{main_~main__x~0=v_main_~main__x~0_1198} AuxVars[] AssignedVars[] [2021-05-02 23:34:55,639 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:34:55,640 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:55,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:55,654 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:34:55,664 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1200) (< v_main_~main__x~0_1200 100)) InVars {main_~main__x~0=v_main_~main__x~0_1200} OutVars{main_~main__x~0=v_main_~main__x~0_1200} AuxVars[] AssignedVars[] [2021-05-02 23:34:55,666 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:34:55,666 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:55,668 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:55,677 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:34:55,679 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:34:55,706 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:34:55,721 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:55,723 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1202 50) (< v_main_~main__x~0_1202 99)) InVars {main_~main__x~0=v_main_~main__x~0_1202} OutVars{main_~main__x~0=v_main_~main__x~0_1202} AuxVars[] AssignedVars[] [2021-05-02 23:34:55,725 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:34:55,730 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:34:55,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:34:55,740 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:34:55,749 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:34:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:55,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:55,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:34:57,408 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061979204] [2021-05-02 23:34:57,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061979204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:57,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:57,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:34:57,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244317256] [2021-05-02 23:34:57,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:34:57,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:34:57,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1449, Invalid=1743, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:34:57,410 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 53 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:00,391 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-05-02 23:35:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:35:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 53 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 23:35:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:00,392 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:35:00,392 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 23:35:00,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 4211.7ms TimeCoverageRelationStatistics Valid=4209, Invalid=7133, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:35:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 23:35:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 23:35:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-05-02 23:35:00,401 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2021-05-02 23:35:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:00,401 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-05-02 23:35:00,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 53 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-05-02 23:35:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 23:35:00,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:00,402 INFO L523 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:00,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:35:00,402 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash -621061236, now seen corresponding path program 41 times [2021-05-02 23:35:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:00,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400725599] [2021-05-02 23:35:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:00,408 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1247 50) InVars {main_~main__x~0=v_main_~main__x~0_1247} OutVars{main_~main__x~0=v_main_~main__x~0_1247} AuxVars[] AssignedVars[] [2021-05-02 23:35:00,409 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:00,410 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:00,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:00,425 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:00,435 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1249 100) (<= 50 v_main_~main__x~0_1249)) InVars {main_~main__x~0=v_main_~main__x~0_1249} OutVars{main_~main__x~0=v_main_~main__x~0_1249} AuxVars[] AssignedVars[] [2021-05-02 23:35:00,437 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:00,438 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:00,439 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:00,448 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:00,450 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:00,472 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:00,487 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:00,490 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1251 50) (< v_main_~main__x~0_1251 99)) InVars {main_~main__x~0=v_main_~main__x~0_1251} OutVars{main_~main__x~0=v_main_~main__x~0_1251} AuxVars[] AssignedVars[] [2021-05-02 23:35:00,491 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:00,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:00,504 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:00,510 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:00,518 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:00,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:00,709 INFO 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 23:35:00,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:00,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:00,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:02,359 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400725599] [2021-05-02 23:35:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400725599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:02,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:02,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:35:02,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190532944] [2021-05-02 23:35:02,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:35:02,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:35:02,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1466, Invalid=1956, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:35:02,361 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 55 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:05,888 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-05-02 23:35:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:35:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 55 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-05-02 23:35:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:05,889 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:35:05,889 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 23:35:05,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4815.2ms TimeCoverageRelationStatistics Valid=4296, Invalid=7914, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:35:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 23:35:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-02 23:35:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-05-02 23:35:05,899 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2021-05-02 23:35:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:05,899 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-05-02 23:35:05,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 55 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-05-02 23:35:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:35:05,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:05,900 INFO L523 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:05,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:35:05,900 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash 153068166, now seen corresponding path program 42 times [2021-05-02 23:35:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:05,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142700149] [2021-05-02 23:35:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:05,910 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1297 50) InVars {main_~main__x~0=v_main_~main__x~0_1297} OutVars{main_~main__x~0=v_main_~main__x~0_1297} AuxVars[] AssignedVars[] [2021-05-02 23:35:05,911 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:05,911 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:05,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:05,928 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:05,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1299) (< v_main_~main__x~0_1299 100)) InVars {main_~main__x~0=v_main_~main__x~0_1299} OutVars{main_~main__x~0=v_main_~main__x~0_1299} AuxVars[] AssignedVars[] [2021-05-02 23:35:05,951 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:05,963 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:05,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:05,974 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:05,977 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:05,990 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:06,007 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:06,010 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1301 99) (<= 50 v_main_~main__x~0_1301)) InVars {main_~main__x~0=v_main_~main__x~0_1301} OutVars{main_~main__x~0=v_main_~main__x~0_1301} AuxVars[] AssignedVars[] [2021-05-02 23:35:06,012 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:06,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:06,021 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:06,031 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:06,034 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:06,060 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:06,083 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1303 50) (< v_main_~main__x~0_1303 99)) InVars {main_~main__x~0=v_main_~main__x~0_1303} OutVars{main_~main__x~0=v_main_~main__x~0_1303} AuxVars[] AssignedVars[] [2021-05-02 23:35:06,094 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:06,095 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:06,102 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:06,114 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:06,125 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,353 INFO 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 23:35:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:06,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:08,073 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:08,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142700149] [2021-05-02 23:35:08,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142700149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:08,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:08,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:35:08,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563511727] [2021-05-02 23:35:08,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:35:08,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:35:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1510, Invalid=2030, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:35:08,074 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:11,590 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2021-05-02 23:35:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:35:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2021-05-02 23:35:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:11,591 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:35:11,591 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:35:11,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 4830.9ms TimeCoverageRelationStatistics Valid=4386, Invalid=8270, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:35:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:35:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 23:35:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-05-02 23:35:11,602 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2021-05-02 23:35:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:11,602 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-05-02 23:35:11,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-05-02 23:35:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 23:35:11,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:11,603 INFO L523 BasicCegarLoop]: trace histogram [44, 41, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:11,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:35:11,603 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1062081280, now seen corresponding path program 43 times [2021-05-02 23:35:11,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:11,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269242038] [2021-05-02 23:35:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:11,613 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1350 50) InVars {main_~main__x~0=v_main_~main__x~0_1350} OutVars{main_~main__x~0=v_main_~main__x~0_1350} AuxVars[] AssignedVars[] [2021-05-02 23:35:11,614 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:11,620 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:11,624 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:11,630 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:11,641 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1352) (< v_main_~main__x~0_1352 100)) InVars {main_~main__x~0=v_main_~main__x~0_1352} OutVars{main_~main__x~0=v_main_~main__x~0_1352} AuxVars[] AssignedVars[] [2021-05-02 23:35:11,643 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:11,644 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:11,645 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:11,654 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:11,656 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:11,679 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:11,695 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:11,706 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1354) (< v_main_~main__x~0_1354 99)) InVars {main_~main__x~0=v_main_~main__x~0_1354} OutVars{main_~main__x~0=v_main_~main__x~0_1354} AuxVars[] AssignedVars[] [2021-05-02 23:35:11,707 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:11,708 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:11,710 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:11,721 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:11,723 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:11,744 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:11,761 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1356 99) (< v_main_~main__x~0_1356 50)) InVars {main_~main__x~0=v_main_~main__x~0_1356} OutVars{main_~main__x~0=v_main_~main__x~0_1356} AuxVars[] AssignedVars[] [2021-05-02 23:35:11,762 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:11,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:11,767 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:11,778 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:11,787 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:12,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:12,020 INFO 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 23:35:12,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:12,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:13,976 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:13,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269242038] [2021-05-02 23:35:13,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269242038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:13,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:13,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:35:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77905448] [2021-05-02 23:35:13,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:35:13,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:13,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:35:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1469, Invalid=2191, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:35:13,978 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 58 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 57 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:17,680 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-02 23:35:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:35:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 57 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 23:35:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:17,681 INFO L225 Difference]: With dead ends: 122 [2021-05-02 23:35:17,682 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:35:17,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 5209.6ms TimeCoverageRelationStatistics Valid=4306, Invalid=8804, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:35:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:35:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-05-02 23:35:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-05-02 23:35:17,692 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2021-05-02 23:35:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:17,692 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-05-02 23:35:17,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 57 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-05-02 23:35:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 23:35:17,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:17,703 INFO L523 BasicCegarLoop]: trace histogram [45, 41, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:17,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:35:17,703 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1549644550, now seen corresponding path program 44 times [2021-05-02 23:35:17,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:17,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893037490] [2021-05-02 23:35:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:17,718 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1404 50) InVars {main_~main__x~0=v_main_~main__x~0_1404} OutVars{main_~main__x~0=v_main_~main__x~0_1404} AuxVars[] AssignedVars[] [2021-05-02 23:35:17,720 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:17,725 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:17,730 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:17,737 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:17,747 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1406) (< v_main_~main__x~0_1406 100)) InVars {main_~main__x~0=v_main_~main__x~0_1406} OutVars{main_~main__x~0=v_main_~main__x~0_1406} AuxVars[] AssignedVars[] [2021-05-02 23:35:17,749 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:17,761 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:17,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:17,773 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:17,775 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:17,788 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:17,805 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:17,807 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1408) (< v_main_~main__x~0_1408 99)) InVars {main_~main__x~0=v_main_~main__x~0_1408} OutVars{main_~main__x~0=v_main_~main__x~0_1408} AuxVars[] AssignedVars[] [2021-05-02 23:35:17,809 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:17,810 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:17,813 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:17,822 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:17,824 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:17,848 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:17,866 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1410 99) (< v_main_~main__x~0_1410 50)) InVars {main_~main__x~0=v_main_~main__x~0_1410} OutVars{main_~main__x~0=v_main_~main__x~0_1410} AuxVars[] AssignedVars[] [2021-05-02 23:35:17,868 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:17,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:17,879 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:17,887 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:17,896 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:18,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:18,090 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 23:35:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:18,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:19,796 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:19,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893037490] [2021-05-02 23:35:19,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [893037490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:19,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:19,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:35:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920233116] [2021-05-02 23:35:19,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:35:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:35:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1512, Invalid=2270, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:35:19,798 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 59 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 58 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:23,555 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-05-02 23:35:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:35:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 58 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 23:35:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:23,556 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:35:23,556 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:35:23,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 4900.4ms TimeCoverageRelationStatistics Valid=4394, Invalid=9178, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:35:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:35:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-05-02 23:35:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-05-02 23:35:23,566 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2021-05-02 23:35:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:23,567 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-05-02 23:35:23,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 58 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-05-02 23:35:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 23:35:23,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:23,568 INFO L523 BasicCegarLoop]: trace histogram [46, 41, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:23,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:35:23,568 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1137700980, now seen corresponding path program 45 times [2021-05-02 23:35:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:23,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776089525] [2021-05-02 23:35:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:23,574 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1459 50) InVars {main_~main__x~0=v_main_~main__x~0_1459} OutVars{main_~main__x~0=v_main_~main__x~0_1459} AuxVars[] AssignedVars[] [2021-05-02 23:35:23,575 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:23,576 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:23,580 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:23,590 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:23,601 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1461 100) (<= 50 v_main_~main__x~0_1461)) InVars {main_~main__x~0=v_main_~main__x~0_1461} OutVars{main_~main__x~0=v_main_~main__x~0_1461} AuxVars[] AssignedVars[] [2021-05-02 23:35:23,603 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:23,619 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:23,621 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:23,632 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:23,635 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:23,649 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:23,666 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:23,667 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1463) (< v_main_~main__x~0_1463 99)) InVars {main_~main__x~0=v_main_~main__x~0_1463} OutVars{main_~main__x~0=v_main_~main__x~0_1463} AuxVars[] AssignedVars[] [2021-05-02 23:35:23,669 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:23,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:23,672 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:23,681 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:23,684 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:23,711 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:23,728 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1465 99) (< v_main_~main__x~0_1465 50)) InVars {main_~main__x~0=v_main_~main__x~0_1465} OutVars{main_~main__x~0=v_main_~main__x~0_1465} AuxVars[] AssignedVars[] [2021-05-02 23:35:23,729 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:23,730 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:23,742 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:23,767 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:23,776 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:24,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:24,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:25,761 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776089525] [2021-05-02 23:35:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776089525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:25,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:25,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:35:25,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132736174] [2021-05-02 23:35:25,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:35:25,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:25,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:35:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1478, Invalid=2428, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:35:25,763 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 60 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 59 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:29,856 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2021-05-02 23:35:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:35:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 59 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 23:35:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:29,858 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:35:29,858 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 23:35:29,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 5228.4ms TimeCoverageRelationStatistics Valid=4328, Invalid=9714, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:35:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 23:35:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-05-02 23:35:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-05-02 23:35:29,869 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2021-05-02 23:35:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:29,869 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-05-02 23:35:29,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 59 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-05-02 23:35:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 23:35:29,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:29,870 INFO L523 BasicCegarLoop]: trace histogram [47, 41, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:29,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:35:29,870 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:29,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1893556882, now seen corresponding path program 46 times [2021-05-02 23:35:29,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:29,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572205751] [2021-05-02 23:35:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:29,878 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1515 50) InVars {main_~main__x~0=v_main_~main__x~0_1515} OutVars{main_~main__x~0=v_main_~main__x~0_1515} AuxVars[] AssignedVars[] [2021-05-02 23:35:29,879 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:29,885 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:29,890 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:29,896 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:29,908 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1517) (< v_main_~main__x~0_1517 100)) InVars {main_~main__x~0=v_main_~main__x~0_1517} OutVars{main_~main__x~0=v_main_~main__x~0_1517} AuxVars[] AssignedVars[] [2021-05-02 23:35:29,910 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:29,922 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:29,924 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:29,939 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:29,942 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:29,955 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:29,972 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:29,974 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1519 99) (<= 50 v_main_~main__x~0_1519)) InVars {main_~main__x~0=v_main_~main__x~0_1519} OutVars{main_~main__x~0=v_main_~main__x~0_1519} AuxVars[] AssignedVars[] [2021-05-02 23:35:29,975 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:29,988 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:29,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:29,999 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:30,004 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:30,019 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:30,038 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1521 50) (< v_main_~main__x~0_1521 99)) InVars {main_~main__x~0=v_main_~main__x~0_1521} OutVars{main_~main__x~0=v_main_~main__x~0_1521} AuxVars[] AssignedVars[] [2021-05-02 23:35:30,039 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:30,045 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:30,050 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:30,056 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:30,066 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:30,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:30,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:30,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:31,947 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:31,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572205751] [2021-05-02 23:35:31,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572205751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:31,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:31,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:35:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770106126] [2021-05-02 23:35:31,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:35:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:35:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=2510, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:35:31,949 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 60 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:35,930 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-05-02 23:35:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:35:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 60 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-02 23:35:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:35,931 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:35:35,931 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 23:35:35,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 5127.3ms TimeCoverageRelationStatistics Valid=4418, Invalid=10102, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:35:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 23:35:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-05-02 23:35:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-05-02 23:35:35,942 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2021-05-02 23:35:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:35,943 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-05-02 23:35:35,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 60 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-05-02 23:35:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 23:35:35,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:35,943 INFO L523 BasicCegarLoop]: trace histogram [48, 41, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:35,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:35:35,944 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1350431720, now seen corresponding path program 47 times [2021-05-02 23:35:35,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:35,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304960111] [2021-05-02 23:35:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:35,951 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1572 50) InVars {main_~main__x~0=v_main_~main__x~0_1572} OutVars{main_~main__x~0=v_main_~main__x~0_1572} AuxVars[] AssignedVars[] [2021-05-02 23:35:35,953 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:35,953 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:35,962 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:35,974 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:35,986 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1574) (< v_main_~main__x~0_1574 100)) InVars {main_~main__x~0=v_main_~main__x~0_1574} OutVars{main_~main__x~0=v_main_~main__x~0_1574} AuxVars[] AssignedVars[] [2021-05-02 23:35:35,988 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:35,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:35,993 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:36,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:36,007 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:36,032 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:36,050 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:36,053 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1576) (< v_main_~main__x~0_1576 99)) InVars {main_~main__x~0=v_main_~main__x~0_1576} OutVars{main_~main__x~0=v_main_~main__x~0_1576} AuxVars[] AssignedVars[] [2021-05-02 23:35:36,054 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:36,068 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:36,070 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:36,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:36,082 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:36,097 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:36,119 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1578 99) (< v_main_~main__x~0_1578 50)) InVars {main_~main__x~0=v_main_~main__x~0_1578} OutVars{main_~main__x~0=v_main_~main__x~0_1578} AuxVars[] AssignedVars[] [2021-05-02 23:35:36,120 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:36,127 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:36,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:36,150 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:36,160 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:36,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:36,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:36,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:38,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:38,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304960111] [2021-05-02 23:35:38,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304960111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:38,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:38,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:35:38,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092145734] [2021-05-02 23:35:38,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:35:38,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:35:38,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1518, Invalid=2642, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:35:38,263 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 62 states, 62 states have (on average 1.935483870967742) internal successors, (120), 61 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:42,746 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-02 23:35:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:35:42,749 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.935483870967742) internal successors, (120), 61 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 23:35:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:42,750 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:35:42,750 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 23:35:42,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 5571.7ms TimeCoverageRelationStatistics Valid=4412, Invalid=10594, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:35:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 23:35:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-05-02 23:35:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-05-02 23:35:42,762 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2021-05-02 23:35:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:42,762 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-05-02 23:35:42,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.935483870967742) internal successors, (120), 61 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-05-02 23:35:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:35:42,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:42,763 INFO L523 BasicCegarLoop]: trace histogram [49, 41, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:42,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:35:42,763 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash 677221346, now seen corresponding path program 48 times [2021-05-02 23:35:42,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:42,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44370792] [2021-05-02 23:35:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:42,769 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1630 50) InVars {main_~main__x~0=v_main_~main__x~0_1630} OutVars{main_~main__x~0=v_main_~main__x~0_1630} AuxVars[] AssignedVars[] [2021-05-02 23:35:42,771 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:42,776 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:42,781 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:42,788 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:42,799 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1632) (< v_main_~main__x~0_1632 100)) InVars {main_~main__x~0=v_main_~main__x~0_1632} OutVars{main_~main__x~0=v_main_~main__x~0_1632} AuxVars[] AssignedVars[] [2021-05-02 23:35:42,802 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:42,803 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:42,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:42,813 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:42,815 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:42,844 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:42,862 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:42,864 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1634 99) (<= 50 v_main_~main__x~0_1634)) InVars {main_~main__x~0=v_main_~main__x~0_1634} OutVars{main_~main__x~0=v_main_~main__x~0_1634} AuxVars[] AssignedVars[] [2021-05-02 23:35:42,866 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:42,867 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:42,868 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:42,877 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:42,880 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:42,904 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:42,925 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1636 50) (< v_main_~main__x~0_1636 99)) InVars {main_~main__x~0=v_main_~main__x~0_1636} OutVars{main_~main__x~0=v_main_~main__x~0_1636} AuxVars[] AssignedVars[] [2021-05-02 23:35:42,927 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:42,933 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:42,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:42,944 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:42,954 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:43,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:43,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:43,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:43,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:45,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:45,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44370792] [2021-05-02 23:35:45,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [44370792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:45,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:45,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:35:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993875801] [2021-05-02 23:35:45,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:35:45,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:35:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=2770, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:35:45,025 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:49,110 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2021-05-02 23:35:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:35:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 23:35:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:49,112 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:35:49,112 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:35:49,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2915 ImplicationChecksByTransitivity, 5555.5ms TimeCoverageRelationStatistics Valid=4418, Invalid=11082, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:35:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:35:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-05-02 23:35:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2021-05-02 23:35:49,123 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2021-05-02 23:35:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:49,123 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2021-05-02 23:35:49,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2021-05-02 23:35:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 23:35:49,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:49,124 INFO L523 BasicCegarLoop]: trace histogram [50, 41, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:49,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:35:49,124 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2032853668, now seen corresponding path program 49 times [2021-05-02 23:35:49,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:49,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858607605] [2021-05-02 23:35:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:49,132 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1689 50) InVars {main_~main__x~0=v_main_~main__x~0_1689} OutVars{main_~main__x~0=v_main_~main__x~0_1689} AuxVars[] AssignedVars[] [2021-05-02 23:35:49,133 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:49,134 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,139 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:49,150 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:49,161 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1691 100) (<= 50 v_main_~main__x~0_1691)) InVars {main_~main__x~0=v_main_~main__x~0_1691} OutVars{main_~main__x~0=v_main_~main__x~0_1691} AuxVars[] AssignedVars[] [2021-05-02 23:35:49,163 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:49,164 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,175 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:49,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:49,201 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:49,218 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:49,220 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1693) (< v_main_~main__x~0_1693 99)) InVars {main_~main__x~0=v_main_~main__x~0_1693} OutVars{main_~main__x~0=v_main_~main__x~0_1693} AuxVars[] AssignedVars[] [2021-05-02 23:35:49,223 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:49,236 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,242 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,255 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:49,257 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:49,276 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:49,306 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1695 99) (< v_main_~main__x~0_1695 50)) InVars {main_~main__x~0=v_main_~main__x~0_1695} OutVars{main_~main__x~0=v_main_~main__x~0_1695} AuxVars[] AssignedVars[] [2021-05-02 23:35:49,308 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:49,314 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:49,318 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:49,325 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:49,334 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:49,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:49,576 INFO 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 23:35:49,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:49,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:51,573 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:51,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858607605] [2021-05-02 23:35:51,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [858607605] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:51,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:51,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:35:51,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505770313] [2021-05-02 23:35:51,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:35:51,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:51,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:35:51,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=2932, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:35:51,575 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 64 states, 64 states have (on average 1.9375) internal successors, (124), 63 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:56,593 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-05-02 23:35:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:35:56,594 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.9375) internal successors, (124), 63 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 23:35:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:56,594 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:35:56,594 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 23:35:56,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 6037.3ms TimeCoverageRelationStatistics Valid=4360, Invalid=11642, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:35:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 23:35:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-05-02 23:35:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-05-02 23:35:56,612 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2021-05-02 23:35:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:56,612 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-05-02 23:35:56,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.9375) internal successors, (124), 63 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:35:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-05-02 23:35:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 23:35:56,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:56,613 INFO L523 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:56,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:35:56,613 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 630206550, now seen corresponding path program 50 times [2021-05-02 23:35:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:56,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428628156] [2021-05-02 23:35:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:56,618 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1749 50) InVars {main_~main__x~0=v_main_~main__x~0_1749} OutVars{main_~main__x~0=v_main_~main__x~0_1749} AuxVars[] AssignedVars[] [2021-05-02 23:35:56,620 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:35:56,625 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:56,630 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:56,646 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:35:56,658 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1751) (< v_main_~main__x~0_1751 100)) InVars {main_~main__x~0=v_main_~main__x~0_1751} OutVars{main_~main__x~0=v_main_~main__x~0_1751} AuxVars[] AssignedVars[] [2021-05-02 23:35:56,660 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:56,661 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:56,662 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:56,678 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:56,680 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:56,704 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:56,723 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:56,725 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1753) (< v_main_~main__x~0_1753 99)) InVars {main_~main__x~0=v_main_~main__x~0_1753} OutVars{main_~main__x~0=v_main_~main__x~0_1753} AuxVars[] AssignedVars[] [2021-05-02 23:35:56,727 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:35:56,744 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:56,745 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:56,754 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:35:56,757 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:35:56,771 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:35:56,789 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1755 50) (< v_main_~main__x~0_1755 99)) InVars {main_~main__x~0=v_main_~main__x~0_1755} OutVars{main_~main__x~0=v_main_~main__x~0_1755} AuxVars[] AssignedVars[] [2021-05-02 23:35:56,790 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:35:56,791 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:35:56,796 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:35:56,808 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:35:56,819 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:35:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:57,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:57,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:57,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:57,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:35:58,977 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:58,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428628156] [2021-05-02 23:35:58,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [428628156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:58,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:58,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:35:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228206255] [2021-05-02 23:35:58,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:35:58,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:58,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:35:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=3032, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:35:58,979 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 65 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 64 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:03,640 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2021-05-02 23:36:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:36:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 64 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 23:36:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:03,642 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:36:03,642 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 23:36:03,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 5907.9ms TimeCoverageRelationStatistics Valid=4430, Invalid=12082, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:36:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 23:36:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 23:36:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-05-02 23:36:03,656 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2021-05-02 23:36:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:03,656 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-05-02 23:36:03,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 64 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-05-02 23:36:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 23:36:03,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:03,656 INFO L523 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:03,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:36:03,657 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 30567632, now seen corresponding path program 51 times [2021-05-02 23:36:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950682757] [2021-05-02 23:36:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:03,663 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1810 50) InVars {main_~main__x~0=v_main_~main__x~0_1810} OutVars{main_~main__x~0=v_main_~main__x~0_1810} AuxVars[] AssignedVars[] [2021-05-02 23:36:03,665 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:03,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,675 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:03,682 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:03,693 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1812 100) (<= 50 v_main_~main__x~0_1812)) InVars {main_~main__x~0=v_main_~main__x~0_1812} OutVars{main_~main__x~0=v_main_~main__x~0_1812} AuxVars[] AssignedVars[] [2021-05-02 23:36:03,695 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:03,696 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,699 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,720 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:03,722 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:03,745 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:03,767 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:03,769 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1814 99) (<= 50 v_main_~main__x~0_1814)) InVars {main_~main__x~0=v_main_~main__x~0_1814} OutVars{main_~main__x~0=v_main_~main__x~0_1814} AuxVars[] AssignedVars[] [2021-05-02 23:36:03,771 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:03,785 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,787 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,798 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:03,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:03,840 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:03,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1816 50) (< v_main_~main__x~0_1816 99)) InVars {main_~main__x~0=v_main_~main__x~0_1816} OutVars{main_~main__x~0=v_main_~main__x~0_1816} AuxVars[] AssignedVars[] [2021-05-02 23:36:03,868 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:03,875 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:03,880 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:03,888 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:03,900 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:04,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:04,139 INFO 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 23:36:04,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:04,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:04,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:06,226 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:06,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950682757] [2021-05-02 23:36:06,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950682757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:06,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:06,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:36:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373558727] [2021-05-02 23:36:06,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:36:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:36:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1537, Invalid=3155, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:36:06,228 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 65 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:11,398 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-02 23:36:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:36:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 65 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 23:36:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:11,400 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:36:11,400 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:36:11,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3506 ImplicationChecksByTransitivity, 6149.0ms TimeCoverageRelationStatistics Valid=4458, Invalid=12572, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:36:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:36:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 23:36:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-05-02 23:36:11,424 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2021-05-02 23:36:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:11,424 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-05-02 23:36:11,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 65 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-05-02 23:36:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 23:36:11,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:11,425 INFO L523 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:11,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:36:11,425 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash -696814902, now seen corresponding path program 52 times [2021-05-02 23:36:11,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:11,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390066193] [2021-05-02 23:36:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:11,439 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1872 50) InVars {main_~main__x~0=v_main_~main__x~0_1872} OutVars{main_~main__x~0=v_main_~main__x~0_1872} AuxVars[] AssignedVars[] [2021-05-02 23:36:11,440 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:11,441 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:11,445 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:11,457 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:11,468 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1874 100) (<= 50 v_main_~main__x~0_1874)) InVars {main_~main__x~0=v_main_~main__x~0_1874} OutVars{main_~main__x~0=v_main_~main__x~0_1874} AuxVars[] AssignedVars[] [2021-05-02 23:36:11,470 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:11,482 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:11,484 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:11,494 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:11,496 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:11,510 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:11,529 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:11,531 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_1876) (< v_main_~main__x~0_1876 99)) InVars {main_~main__x~0=v_main_~main__x~0_1876} OutVars{main_~main__x~0=v_main_~main__x~0_1876} AuxVars[] AssignedVars[] [2021-05-02 23:36:11,533 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:11,547 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:11,550 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:11,564 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:11,570 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:11,596 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:11,616 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1878 99) (< v_main_~main__x~0_1878 50)) InVars {main_~main__x~0=v_main_~main__x~0_1878} OutVars{main_~main__x~0=v_main_~main__x~0_1878} AuxVars[] AssignedVars[] [2021-05-02 23:36:11,617 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:11,624 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:11,629 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:11,636 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:11,647 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:11,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:11,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:13,817 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:13,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390066193] [2021-05-02 23:36:13,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390066193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:13,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:13,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:36:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797206259] [2021-05-02 23:36:13,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:36:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:13,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:36:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1528, Invalid=3302, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:36:13,819 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 67 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 66 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:19,062 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-05-02 23:36:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:36:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 66 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 23:36:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:19,063 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:36:19,063 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 23:36:19,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 5981.3ms TimeCoverageRelationStatistics Valid=4442, Invalid=13114, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:36:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 23:36:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-05-02 23:36:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-05-02 23:36:19,076 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2021-05-02 23:36:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:19,076 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-05-02 23:36:19,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 66 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-05-02 23:36:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 23:36:19,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:19,077 INFO L523 BasicCegarLoop]: trace histogram [54, 41, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:19,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:36:19,077 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash 368239172, now seen corresponding path program 53 times [2021-05-02 23:36:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:19,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975491257] [2021-05-02 23:36:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:19,086 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1935 50) InVars {main_~main__x~0=v_main_~main__x~0_1935} OutVars{main_~main__x~0=v_main_~main__x~0_1935} AuxVars[] AssignedVars[] [2021-05-02 23:36:19,088 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:19,088 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:19,094 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:19,111 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:19,124 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1937 100) (<= 50 v_main_~main__x~0_1937)) InVars {main_~main__x~0=v_main_~main__x~0_1937} OutVars{main_~main__x~0=v_main_~main__x~0_1937} AuxVars[] AssignedVars[] [2021-05-02 23:36:19,126 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:19,127 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:19,130 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:19,140 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:19,143 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:19,173 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:19,193 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:19,196 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1939 99) (<= 50 v_main_~main__x~0_1939)) InVars {main_~main__x~0=v_main_~main__x~0_1939} OutVars{main_~main__x~0=v_main_~main__x~0_1939} AuxVars[] AssignedVars[] [2021-05-02 23:36:19,197 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:19,198 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:19,200 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:19,213 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:19,216 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:19,244 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:19,270 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_1941 50) (< v_main_~main__x~0_1941 99)) InVars {main_~main__x~0=v_main_~main__x~0_1941} OutVars{main_~main__x~0=v_main_~main__x~0_1941} AuxVars[] AssignedVars[] [2021-05-02 23:36:19,271 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:19,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:19,277 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:19,291 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:19,303 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:19,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:19,537 INFO 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 23:36:19,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:19,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:19,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:21,678 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:21,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975491257] [2021-05-02 23:36:21,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [975491257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:21,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:21,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:36:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132611362] [2021-05-02 23:36:21,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:36:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:36:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1543, Invalid=3427, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:36:21,680 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 68 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 67 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:27,291 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2021-05-02 23:36:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:36:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 67 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 23:36:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:27,293 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:36:27,293 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:36:27,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 6369.4ms TimeCoverageRelationStatistics Valid=4474, Invalid=13616, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:36:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:36:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-05-02 23:36:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-05-02 23:36:27,306 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2021-05-02 23:36:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:27,306 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-05-02 23:36:27,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 67 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-05-02 23:36:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:36:27,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:27,307 INFO L523 BasicCegarLoop]: trace histogram [55, 41, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:27,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:36:27,307 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1682987838, now seen corresponding path program 54 times [2021-05-02 23:36:27,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:27,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289119434] [2021-05-02 23:36:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:27,315 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_1999 50) InVars {main_~main__x~0=v_main_~main__x~0_1999} OutVars{main_~main__x~0=v_main_~main__x~0_1999} AuxVars[] AssignedVars[] [2021-05-02 23:36:27,316 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:27,323 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:27,328 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:27,335 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:27,348 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2001 100) (<= 50 v_main_~main__x~0_2001)) InVars {main_~main__x~0=v_main_~main__x~0_2001} OutVars{main_~main__x~0=v_main_~main__x~0_2001} AuxVars[] AssignedVars[] [2021-05-02 23:36:27,352 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:27,365 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:27,368 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:27,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:27,382 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:27,406 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:27,434 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:27,438 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2003 99) (<= 50 v_main_~main__x~0_2003)) InVars {main_~main__x~0=v_main_~main__x~0_2003} OutVars{main_~main__x~0=v_main_~main__x~0_2003} AuxVars[] AssignedVars[] [2021-05-02 23:36:27,440 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:27,453 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:27,455 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:27,465 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:27,468 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:27,483 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:27,503 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2005 99) (< v_main_~main__x~0_2005 50)) InVars {main_~main__x~0=v_main_~main__x~0_2005} OutVars{main_~main__x~0=v_main_~main__x~0_2005} AuxVars[] AssignedVars[] [2021-05-02 23:36:27,504 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:27,505 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:27,510 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:27,530 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:27,540 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:27,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:27,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:27,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:27,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:29,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289119434] [2021-05-02 23:36:29,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [289119434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:29,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:29,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:36:29,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108494760] [2021-05-02 23:36:29,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:36:29,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:29,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:36:29,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=3621, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:36:29,845 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:35,612 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2021-05-02 23:36:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:36:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 23:36:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:35,614 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:36:35,614 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 23:36:35,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4147 ImplicationChecksByTransitivity, 6406.7ms TimeCoverageRelationStatistics Valid=4372, Invalid=14260, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:36:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 23:36:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-05-02 23:36:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-05-02 23:36:35,628 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2021-05-02 23:36:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:35,628 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-05-02 23:36:35,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-05-02 23:36:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 23:36:35,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:35,629 INFO L523 BasicCegarLoop]: trace histogram [56, 41, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:35,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:36:35,629 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1858896456, now seen corresponding path program 55 times [2021-05-02 23:36:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800575597] [2021-05-02 23:36:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:35,639 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2064 50) InVars {main_~main__x~0=v_main_~main__x~0_2064} OutVars{main_~main__x~0=v_main_~main__x~0_2064} AuxVars[] AssignedVars[] [2021-05-02 23:36:35,640 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:35,641 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:35,649 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:35,661 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:35,675 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2066) (< v_main_~main__x~0_2066 100)) InVars {main_~main__x~0=v_main_~main__x~0_2066} OutVars{main_~main__x~0=v_main_~main__x~0_2066} AuxVars[] AssignedVars[] [2021-05-02 23:36:35,677 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:35,692 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:35,696 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:35,707 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:35,710 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:35,729 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:35,749 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:35,751 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2068) (< v_main_~main__x~0_2068 99)) InVars {main_~main__x~0=v_main_~main__x~0_2068} OutVars{main_~main__x~0=v_main_~main__x~0_2068} AuxVars[] AssignedVars[] [2021-05-02 23:36:35,753 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:35,754 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:35,761 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:35,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:35,777 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:35,809 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:35,833 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2070 50) (< v_main_~main__x~0_2070 99)) InVars {main_~main__x~0=v_main_~main__x~0_2070} OutVars{main_~main__x~0=v_main_~main__x~0_2070} AuxVars[] AssignedVars[] [2021-05-02 23:36:35,834 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:35,835 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:35,841 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:35,856 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:35,867 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:36,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:36,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:36,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:38,187 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:38,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800575597] [2021-05-02 23:36:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800575597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:38,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:38,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:36:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578314405] [2021-05-02 23:36:38,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:36:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:36:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=3707, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:36:38,189 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 70 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 69 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:44,044 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-02 23:36:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:36:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 69 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 23:36:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:44,046 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:36:44,046 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 23:36:44,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 6411.0ms TimeCoverageRelationStatistics Valid=4490, Invalid=14692, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:36:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 23:36:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-05-02 23:36:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-05-02 23:36:44,085 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2021-05-02 23:36:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:44,085 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-05-02 23:36:44,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 69 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-05-02 23:36:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 23:36:44,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:44,086 INFO L523 BasicCegarLoop]: trace histogram [57, 41, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:44,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:36:44,087 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash 299362738, now seen corresponding path program 56 times [2021-05-02 23:36:44,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:44,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77654560] [2021-05-02 23:36:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:44,109 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2130 50) InVars {main_~main__x~0=v_main_~main__x~0_2130} OutVars{main_~main__x~0=v_main_~main__x~0_2130} AuxVars[] AssignedVars[] [2021-05-02 23:36:44,110 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:44,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:44,126 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:44,134 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:44,149 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2132) (< v_main_~main__x~0_2132 100)) InVars {main_~main__x~0=v_main_~main__x~0_2132} OutVars{main_~main__x~0=v_main_~main__x~0_2132} AuxVars[] AssignedVars[] [2021-05-02 23:36:44,151 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:44,167 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:44,169 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:44,184 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:44,187 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:44,205 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:44,226 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:44,228 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2134 99) (<= 50 v_main_~main__x~0_2134)) InVars {main_~main__x~0=v_main_~main__x~0_2134} OutVars{main_~main__x~0=v_main_~main__x~0_2134} AuxVars[] AssignedVars[] [2021-05-02 23:36:44,230 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:44,246 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:44,248 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:44,260 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:44,263 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:44,293 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:44,317 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2136 99) (< v_main_~main__x~0_2136 50)) InVars {main_~main__x~0=v_main_~main__x~0_2136} OutVars{main_~main__x~0=v_main_~main__x~0_2136} AuxVars[] AssignedVars[] [2021-05-02 23:36:44,318 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:44,327 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:44,336 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:44,344 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:44,356 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:44,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:44,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:44,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:46,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77654560] [2021-05-02 23:36:46,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [77654560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:46,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:46,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:36:46,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892046286] [2021-05-02 23:36:46,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:36:46,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:46,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:36:46,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=3866, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:36:46,875 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 71 states, 71 states have (on average 1.943661971830986) internal successors, (138), 70 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:53,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:53,145 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-05-02 23:36:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:36:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.943661971830986) internal successors, (138), 70 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-05-02 23:36:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:53,156 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:36:53,157 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 23:36:53,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4511 ImplicationChecksByTransitivity, 6834.7ms TimeCoverageRelationStatistics Valid=4466, Invalid=15274, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:36:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 23:36:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-05-02 23:36:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-05-02 23:36:53,173 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2021-05-02 23:36:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:53,173 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-05-02 23:36:53,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.943661971830986) internal successors, (138), 70 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:36:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-05-02 23:36:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:36:53,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:53,174 INFO L523 BasicCegarLoop]: trace histogram [58, 41, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:53,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-02 23:36:53,174 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:53,174 INFO L82 PathProgramCache]: Analyzing trace with hash -82755796, now seen corresponding path program 57 times [2021-05-02 23:36:53,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:53,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794913608] [2021-05-02 23:36:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:53,181 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2197 50) InVars {main_~main__x~0=v_main_~main__x~0_2197} OutVars{main_~main__x~0=v_main_~main__x~0_2197} AuxVars[] AssignedVars[] [2021-05-02 23:36:53,183 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:36:53,189 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:53,194 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:53,202 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:36:53,214 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2199) (< v_main_~main__x~0_2199 100)) InVars {main_~main__x~0=v_main_~main__x~0_2199} OutVars{main_~main__x~0=v_main_~main__x~0_2199} AuxVars[] AssignedVars[] [2021-05-02 23:36:53,216 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:53,217 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:53,219 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:53,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:53,234 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:53,259 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:53,277 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:53,287 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2201) (< v_main_~main__x~0_2201 99)) InVars {main_~main__x~0=v_main_~main__x~0_2201} OutVars{main_~main__x~0=v_main_~main__x~0_2201} AuxVars[] AssignedVars[] [2021-05-02 23:36:53,289 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:36:53,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:53,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:53,304 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:36:53,307 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:36:53,336 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:36:53,358 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2203 99) (< v_main_~main__x~0_2203 50)) InVars {main_~main__x~0=v_main_~main__x~0_2203} OutVars{main_~main__x~0=v_main_~main__x~0_2203} AuxVars[] AssignedVars[] [2021-05-02 23:36:53,360 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:36:53,361 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:36:53,366 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:36:53,380 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:36:53,392 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:36:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:53,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:53,634 INFO 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 23:36:53,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:53,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:36:55,805 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:55,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794913608] [2021-05-02 23:36:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [794913608] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:55,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:55,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:36:55,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340874229] [2021-05-02 23:36:55,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:36:55,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:36:55,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:36:55,807 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 72 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 71 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:02,389 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2021-05-02 23:37:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:37:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 71 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:37:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:02,391 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:37:02,391 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 23:37:02,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 6967.7ms TimeCoverageRelationStatistics Valid=4506, Invalid=15800, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:37:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 23:37:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-05-02 23:37:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-05-02 23:37:02,406 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2021-05-02 23:37:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:02,407 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-05-02 23:37:02,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 71 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-05-02 23:37:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:37:02,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:02,407 INFO L523 BasicCegarLoop]: trace histogram [59, 41, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:02,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-02 23:37:02,408 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2068520486, now seen corresponding path program 58 times [2021-05-02 23:37:02,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:02,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502211232] [2021-05-02 23:37:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:02,415 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2265 50) InVars {main_~main__x~0=v_main_~main__x~0_2265} OutVars{main_~main__x~0=v_main_~main__x~0_2265} AuxVars[] AssignedVars[] [2021-05-02 23:37:02,417 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:37:02,424 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:02,430 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:02,438 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:37:02,454 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2267 100) (<= 50 v_main_~main__x~0_2267)) InVars {main_~main__x~0=v_main_~main__x~0_2267} OutVars{main_~main__x~0=v_main_~main__x~0_2267} AuxVars[] AssignedVars[] [2021-05-02 23:37:02,456 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:02,457 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:02,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:02,474 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:02,477 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:02,511 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:02,531 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:02,534 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2269) (< v_main_~main__x~0_2269 99)) InVars {main_~main__x~0=v_main_~main__x~0_2269} OutVars{main_~main__x~0=v_main_~main__x~0_2269} AuxVars[] AssignedVars[] [2021-05-02 23:37:02,537 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:02,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:02,541 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:02,554 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:02,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:02,583 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:02,603 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2271 50) (< v_main_~main__x~0_2271 99)) InVars {main_~main__x~0=v_main_~main__x~0_2271} OutVars{main_~main__x~0=v_main_~main__x~0_2271} AuxVars[] AssignedVars[] [2021-05-02 23:37:02,607 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:37:02,615 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:02,620 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:02,640 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:37:02,651 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:02,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:02,881 INFO 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 23:37:02,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:02,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:02,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:05,226 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502211232] [2021-05-02 23:37:05,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [502211232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:05,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:05,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:37:05,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823389077] [2021-05-02 23:37:05,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:37:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:37:05,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1558, Invalid=4142, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:37:05,228 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 73 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 72 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:11,517 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-05-02 23:37:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:37:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 72 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 23:37:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:11,519 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:37:11,519 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:37:11,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4920 ImplicationChecksByTransitivity, 7402.8ms TimeCoverageRelationStatistics Valid=4514, Invalid=16366, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:37:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:37:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-05-02 23:37:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-05-02 23:37:11,536 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2021-05-02 23:37:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:11,536 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-05-02 23:37:11,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.9452054794520548) internal successors, (142), 72 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-05-02 23:37:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:37:11,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:11,537 INFO L523 BasicCegarLoop]: trace histogram [60, 41, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:11,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-02 23:37:11,537 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -729209184, now seen corresponding path program 59 times [2021-05-02 23:37:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:11,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252473941] [2021-05-02 23:37:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:11,546 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2334 50) InVars {main_~main__x~0=v_main_~main__x~0_2334} OutVars{main_~main__x~0=v_main_~main__x~0_2334} AuxVars[] AssignedVars[] [2021-05-02 23:37:11,548 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:37:11,555 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:11,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:11,567 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:37:11,580 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2336) (< v_main_~main__x~0_2336 100)) InVars {main_~main__x~0=v_main_~main__x~0_2336} OutVars{main_~main__x~0=v_main_~main__x~0_2336} AuxVars[] AssignedVars[] [2021-05-02 23:37:11,582 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:11,583 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:11,586 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:11,598 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:11,601 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:11,628 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:11,647 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:11,650 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2338) (< v_main_~main__x~0_2338 99)) InVars {main_~main__x~0=v_main_~main__x~0_2338} OutVars{main_~main__x~0=v_main_~main__x~0_2338} AuxVars[] AssignedVars[] [2021-05-02 23:37:11,652 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:11,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:11,674 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:11,686 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:11,689 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:11,707 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:11,729 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2340 50) (< v_main_~main__x~0_2340 99)) InVars {main_~main__x~0=v_main_~main__x~0_2340} OutVars{main_~main__x~0=v_main_~main__x~0_2340} AuxVars[] AssignedVars[] [2021-05-02 23:37:11,731 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:37:11,738 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:11,744 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:11,752 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:37:11,764 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:11,983 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 23:37:11,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:11,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:12,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:14,356 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252473941] [2021-05-02 23:37:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252473941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:14,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:14,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:37:14,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961813887] [2021-05-02 23:37:14,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:37:14,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:37:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1561, Invalid=4291, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:37:14,359 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 74 states, 74 states have (on average 1.945945945945946) internal successors, (144), 73 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:21,620 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-02 23:37:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:37:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.945945945945946) internal successors, (144), 73 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 23:37:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:21,621 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:37:21,621 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 23:37:21,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5126 ImplicationChecksByTransitivity, 7553.6ms TimeCoverageRelationStatistics Valid=4522, Invalid=16940, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 23:37:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 23:37:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-05-02 23:37:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-05-02 23:37:21,652 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2021-05-02 23:37:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:21,652 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-05-02 23:37:21,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.945945945945946) internal successors, (144), 73 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-05-02 23:37:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:37:21,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:21,653 INFO L523 BasicCegarLoop]: trace histogram [61, 41, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:21,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-02 23:37:21,653 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -697894758, now seen corresponding path program 60 times [2021-05-02 23:37:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306556242] [2021-05-02 23:37:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:21,662 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2404 50) InVars {main_~main__x~0=v_main_~main__x~0_2404} OutVars{main_~main__x~0=v_main_~main__x~0_2404} AuxVars[] AssignedVars[] [2021-05-02 23:37:21,663 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:37:21,664 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,670 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:21,682 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:37:21,696 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2406) (< v_main_~main__x~0_2406 100)) InVars {main_~main__x~0=v_main_~main__x~0_2406} OutVars{main_~main__x~0=v_main_~main__x~0_2406} AuxVars[] AssignedVars[] [2021-05-02 23:37:21,698 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:21,714 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,716 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:21,731 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:21,748 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:21,767 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:21,769 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2408) (< v_main_~main__x~0_2408 99)) InVars {main_~main__x~0=v_main_~main__x~0_2408} OutVars{main_~main__x~0=v_main_~main__x~0_2408} AuxVars[] AssignedVars[] [2021-05-02 23:37:21,781 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:21,801 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,803 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,816 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:21,819 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:21,834 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:21,871 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2410 99) (< v_main_~main__x~0_2410 50)) InVars {main_~main__x~0=v_main_~main__x~0_2410} OutVars{main_~main__x~0=v_main_~main__x~0_2410} AuxVars[] AssignedVars[] [2021-05-02 23:37:21,873 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:37:21,880 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:21,886 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:21,893 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:37:21,905 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:22,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:22,256 INFO 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 23:37:22,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:22,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:22,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:25,106 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:25,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306556242] [2021-05-02 23:37:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [306556242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:25,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:25,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:37:25,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934991531] [2021-05-02 23:37:25,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:37:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:37:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1523, Invalid=4483, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:37:25,109 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:33,152 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2021-05-02 23:37:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:37:33,153 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2021-05-02 23:37:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:33,153 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:37:33,154 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:37:33,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3734 ImplicationChecksByTransitivity, 8642.8ms TimeCoverageRelationStatistics Valid=4448, Invalid=17604, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 23:37:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:37:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-05-02 23:37:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-05-02 23:37:33,171 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2021-05-02 23:37:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:33,171 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-05-02 23:37:33,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-05-02 23:37:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 23:37:33,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:33,172 INFO L523 BasicCegarLoop]: trace histogram [62, 41, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:33,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-02 23:37:33,172 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -669502444, now seen corresponding path program 61 times [2021-05-02 23:37:33,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:33,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657241509] [2021-05-02 23:37:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:33,180 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2475 50) InVars {main_~main__x~0=v_main_~main__x~0_2475} OutVars{main_~main__x~0=v_main_~main__x~0_2475} AuxVars[] AssignedVars[] [2021-05-02 23:37:33,182 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:37:33,189 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:33,195 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:33,203 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:37:33,216 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2477 100) (<= 50 v_main_~main__x~0_2477)) InVars {main_~main__x~0=v_main_~main__x~0_2477} OutVars{main_~main__x~0=v_main_~main__x~0_2477} AuxVars[] AssignedVars[] [2021-05-02 23:37:33,222 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:33,240 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:33,243 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:33,258 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:33,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:33,280 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:33,302 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:33,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2479) (< v_main_~main__x~0_2479 99)) InVars {main_~main__x~0=v_main_~main__x~0_2479} OutVars{main_~main__x~0=v_main_~main__x~0_2479} AuxVars[] AssignedVars[] [2021-05-02 23:37:33,307 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:33,308 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:33,310 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:33,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:33,327 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:33,361 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:33,391 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2481 50) (< v_main_~main__x~0_2481 99)) InVars {main_~main__x~0=v_main_~main__x~0_2481} OutVars{main_~main__x~0=v_main_~main__x~0_2481} AuxVars[] AssignedVars[] [2021-05-02 23:37:33,393 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:37:33,394 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:33,400 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:33,417 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:37:33,431 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:33,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:33,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:33,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:36,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657241509] [2021-05-02 23:37:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [657241509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:36,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:36,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:37:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065603283] [2021-05-02 23:37:36,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:37:36,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:37:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=4616, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:37:36,205 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 76 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 75 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:44,579 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2021-05-02 23:37:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:37:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 75 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 23:37:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:44,580 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:37:44,581 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 23:37:44,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5541 ImplicationChecksByTransitivity, 8355.6ms TimeCoverageRelationStatistics Valid=4496, Invalid=18154, Unknown=0, NotChecked=0, Total=22650 [2021-05-02 23:37:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 23:37:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-05-02 23:37:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-05-02 23:37:44,600 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2021-05-02 23:37:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:44,600 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-05-02 23:37:44,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 75 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-05-02 23:37:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:37:44,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:44,601 INFO L523 BasicCegarLoop]: trace histogram [63, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:44,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-02 23:37:44,601 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 845707534, now seen corresponding path program 62 times [2021-05-02 23:37:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:44,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927639814] [2021-05-02 23:37:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:44,612 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2547 50) InVars {main_~main__x~0=v_main_~main__x~0_2547} OutVars{main_~main__x~0=v_main_~main__x~0_2547} AuxVars[] AssignedVars[] [2021-05-02 23:37:44,613 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:37:44,621 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:44,627 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:44,635 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:37:44,649 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2549 100) (<= 50 v_main_~main__x~0_2549)) InVars {main_~main__x~0=v_main_~main__x~0_2549} OutVars{main_~main__x~0=v_main_~main__x~0_2549} AuxVars[] AssignedVars[] [2021-05-02 23:37:44,651 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:44,652 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:44,654 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:44,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:44,670 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:44,700 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:44,723 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:44,727 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2551) (< v_main_~main__x~0_2551 99)) InVars {main_~main__x~0=v_main_~main__x~0_2551} OutVars{main_~main__x~0=v_main_~main__x~0_2551} AuxVars[] AssignedVars[] [2021-05-02 23:37:44,733 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:44,752 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:44,754 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:44,770 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:44,773 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:44,795 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:44,819 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2553 99) (< v_main_~main__x~0_2553 50)) InVars {main_~main__x~0=v_main_~main__x~0_2553} OutVars{main_~main__x~0=v_main_~main__x~0_2553} AuxVars[] AssignedVars[] [2021-05-02 23:37:44,821 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:37:44,822 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:44,828 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:44,844 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:37:44,857 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:45,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:47,812 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927639814] [2021-05-02 23:37:47,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927639814] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:47,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:47,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:37:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796201615] [2021-05-02 23:37:47,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:37:47,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:37:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=4772, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:37:47,814 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 77 states, 77 states have (on average 1.948051948051948) internal successors, (150), 76 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:56,063 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2021-05-02 23:37:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:37:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.948051948051948) internal successors, (150), 76 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 23:37:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:56,065 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:37:56,065 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:37:56,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5750 ImplicationChecksByTransitivity, 8987.7ms TimeCoverageRelationStatistics Valid=4502, Invalid=18754, Unknown=0, NotChecked=0, Total=23256 [2021-05-02 23:37:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:37:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-05-02 23:37:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2021-05-02 23:37:56,085 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2021-05-02 23:37:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:56,085 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2021-05-02 23:37:56,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.948051948051948) internal successors, (150), 76 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:37:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2021-05-02 23:37:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:37:56,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:56,086 INFO L523 BasicCegarLoop]: trace histogram [64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:56,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-02 23:37:56,086 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:56,087 INFO L82 PathProgramCache]: Analyzing trace with hash 968583048, now seen corresponding path program 63 times [2021-05-02 23:37:56,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:56,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732607100] [2021-05-02 23:37:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:56,096 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2620 50) InVars {main_~main__x~0=v_main_~main__x~0_2620} OutVars{main_~main__x~0=v_main_~main__x~0_2620} AuxVars[] AssignedVars[] [2021-05-02 23:37:56,098 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:37:56,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:56,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:56,122 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:37:56,139 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2622 100) (<= 50 v_main_~main__x~0_2622)) InVars {main_~main__x~0=v_main_~main__x~0_2622} OutVars{main_~main__x~0=v_main_~main__x~0_2622} AuxVars[] AssignedVars[] [2021-05-02 23:37:56,141 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:56,144 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:56,147 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:56,160 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:56,164 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:56,199 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:56,230 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:56,234 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2624 99) (<= 50 v_main_~main__x~0_2624)) InVars {main_~main__x~0=v_main_~main__x~0_2624} OutVars{main_~main__x~0=v_main_~main__x~0_2624} AuxVars[] AssignedVars[] [2021-05-02 23:37:56,236 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:37:56,256 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:56,260 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:56,276 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:37:56,280 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:37:56,299 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:37:56,323 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2626 99) (< v_main_~main__x~0_2626 50)) InVars {main_~main__x~0=v_main_~main__x~0_2626} OutVars{main_~main__x~0=v_main_~main__x~0_2626} AuxVars[] AssignedVars[] [2021-05-02 23:37:56,325 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:37:56,333 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:37:56,345 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:37:56,353 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:37:56,365 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:37:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:56,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:56,647 INFO 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 23:37:56,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:56,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:56,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:37:59,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:59,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732607100] [2021-05-02 23:37:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [732607100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:59,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:59,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:37:59,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128793819] [2021-05-02 23:37:59,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:37:59,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:37:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:37:59,388 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 78 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 77 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:08,110 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2021-05-02 23:38:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:38:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 77 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 23:38:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:08,112 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:38:08,113 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:38:08,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 8677.9ms TimeCoverageRelationStatistics Valid=4554, Invalid=19316, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 23:38:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:38:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-05-02 23:38:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2021-05-02 23:38:08,132 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 155 [2021-05-02 23:38:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:08,132 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2021-05-02 23:38:08,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 77 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2021-05-02 23:38:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 23:38:08,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:08,133 INFO L523 BasicCegarLoop]: trace histogram [65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:08,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-05-02 23:38:08,133 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:08,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1207132286, now seen corresponding path program 64 times [2021-05-02 23:38:08,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:08,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314601489] [2021-05-02 23:38:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:08,142 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2694 50) InVars {main_~main__x~0=v_main_~main__x~0_2694} OutVars{main_~main__x~0=v_main_~main__x~0_2694} AuxVars[] AssignedVars[] [2021-05-02 23:38:08,144 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:38:08,152 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:08,158 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:08,167 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:38:08,182 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2696) (< v_main_~main__x~0_2696 100)) InVars {main_~main__x~0=v_main_~main__x~0_2696} OutVars{main_~main__x~0=v_main_~main__x~0_2696} AuxVars[] AssignedVars[] [2021-05-02 23:38:08,185 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:08,201 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:08,204 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:08,215 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:08,218 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:08,237 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:08,259 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:08,261 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2698 99) (<= 50 v_main_~main__x~0_2698)) InVars {main_~main__x~0=v_main_~main__x~0_2698} OutVars{main_~main__x~0=v_main_~main__x~0_2698} AuxVars[] AssignedVars[] [2021-05-02 23:38:08,264 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:08,279 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:08,282 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:08,295 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:08,298 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:08,317 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:08,343 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2700 99) (< v_main_~main__x~0_2700 50)) InVars {main_~main__x~0=v_main_~main__x~0_2700} OutVars{main_~main__x~0=v_main_~main__x~0_2700} AuxVars[] AssignedVars[] [2021-05-02 23:38:08,345 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:38:08,353 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:08,359 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:08,373 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:38:08,385 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:08,643 INFO 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 23:38:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:11,437 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:11,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314601489] [2021-05-02 23:38:11,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [314601489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:11,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:11,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:38:11,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181629075] [2021-05-02 23:38:11,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:38:11,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:38:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1576, Invalid=5066, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:38:11,439 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 79 states, 79 states have (on average 1.9493670886075949) internal successors, (154), 78 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:21,077 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2021-05-02 23:38:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:38:21,078 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9493670886075949) internal successors, (154), 78 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 23:38:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:21,079 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:38:21,079 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:38:21,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6171 ImplicationChecksByTransitivity, 9263.7ms TimeCoverageRelationStatistics Valid=4562, Invalid=19930, Unknown=0, NotChecked=0, Total=24492 [2021-05-02 23:38:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:38:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 23:38:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2021-05-02 23:38:21,099 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2021-05-02 23:38:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:21,099 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2021-05-02 23:38:21,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.9493670886075949) internal successors, (154), 78 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2021-05-02 23:38:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 23:38:21,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:21,100 INFO L523 BasicCegarLoop]: trace histogram [66, 41, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:21,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-05-02 23:38:21,100 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -420495108, now seen corresponding path program 65 times [2021-05-02 23:38:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:21,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599953447] [2021-05-02 23:38:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:21,110 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2769 50) InVars {main_~main__x~0=v_main_~main__x~0_2769} OutVars{main_~main__x~0=v_main_~main__x~0_2769} AuxVars[] AssignedVars[] [2021-05-02 23:38:21,111 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:38:21,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:21,126 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:21,135 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:38:21,152 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2771) (< v_main_~main__x~0_2771 100)) InVars {main_~main__x~0=v_main_~main__x~0_2771} OutVars{main_~main__x~0=v_main_~main__x~0_2771} AuxVars[] AssignedVars[] [2021-05-02 23:38:21,154 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:21,171 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:21,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:21,186 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:21,190 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:21,211 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:21,236 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:21,243 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2773 99) (<= 50 v_main_~main__x~0_2773)) InVars {main_~main__x~0=v_main_~main__x~0_2773} OutVars{main_~main__x~0=v_main_~main__x~0_2773} AuxVars[] AssignedVars[] [2021-05-02 23:38:21,245 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:21,246 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:21,249 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:21,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:21,265 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:21,301 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:21,324 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2775 50) (< v_main_~main__x~0_2775 99)) InVars {main_~main__x~0=v_main_~main__x~0_2775} OutVars{main_~main__x~0=v_main_~main__x~0_2775} AuxVars[] AssignedVars[] [2021-05-02 23:38:21,334 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:38:21,342 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:21,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:21,356 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:38:21,369 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:21,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:21,614 INFO 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 23:38:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:21,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:24,623 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:24,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599953447] [2021-05-02 23:38:24,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [599953447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:24,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:24,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:38:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905545156] [2021-05-02 23:38:24,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:38:24,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:38:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1579, Invalid=5227, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:38:24,625 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 80 states, 80 states have (on average 1.95) internal successors, (156), 79 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:34,660 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2021-05-02 23:38:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:38:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.95) internal successors, (156), 79 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 23:38:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:34,662 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:38:34,662 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 23:38:34,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 9700.2ms TimeCoverageRelationStatistics Valid=4570, Invalid=20552, Unknown=0, NotChecked=0, Total=25122 [2021-05-02 23:38:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 23:38:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-05-02 23:38:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-05-02 23:38:34,684 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2021-05-02 23:38:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:34,684 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-05-02 23:38:34,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.95) internal successors, (156), 79 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-05-02 23:38:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:38:34,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:34,685 INFO L523 BasicCegarLoop]: trace histogram [67, 41, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:34,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-02 23:38:34,685 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash -376411146, now seen corresponding path program 66 times [2021-05-02 23:38:34,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:34,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194624566] [2021-05-02 23:38:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:34,695 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2845 50) InVars {main_~main__x~0=v_main_~main__x~0_2845} OutVars{main_~main__x~0=v_main_~main__x~0_2845} AuxVars[] AssignedVars[] [2021-05-02 23:38:34,697 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:38:34,705 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:34,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:34,721 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:38:34,737 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2847) (< v_main_~main__x~0_2847 100)) InVars {main_~main__x~0=v_main_~main__x~0_2847} OutVars{main_~main__x~0=v_main_~main__x~0_2847} AuxVars[] AssignedVars[] [2021-05-02 23:38:34,740 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:34,759 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:34,762 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:34,776 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:34,780 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:34,801 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:34,826 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:34,829 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_2849) (< v_main_~main__x~0_2849 99)) InVars {main_~main__x~0=v_main_~main__x~0_2849} OutVars{main_~main__x~0=v_main_~main__x~0_2849} AuxVars[] AssignedVars[] [2021-05-02 23:38:34,831 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:34,833 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:34,836 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:34,850 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:34,853 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:34,892 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:34,921 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2851 50) (< v_main_~main__x~0_2851 99)) InVars {main_~main__x~0=v_main_~main__x~0_2851} OutVars{main_~main__x~0=v_main_~main__x~0_2851} AuxVars[] AssignedVars[] [2021-05-02 23:38:34,923 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:38:34,933 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:34,941 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:34,953 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:38:34,970 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:35,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:35,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:35,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:35,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:38,512 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:38,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194624566] [2021-05-02 23:38:38,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [194624566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:38,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:38,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:38:38,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045715591] [2021-05-02 23:38:38,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:38:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:38:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1582, Invalid=5390, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:38:38,515 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:48,267 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2021-05-02 23:38:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:38:48,269 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 23:38:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:48,269 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:38:48,269 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:38:48,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6596 ImplicationChecksByTransitivity, 9498.0ms TimeCoverageRelationStatistics Valid=4578, Invalid=21182, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 23:38:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:38:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 23:38:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-05-02 23:38:48,291 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2021-05-02 23:38:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:48,291 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-05-02 23:38:48,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:38:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-05-02 23:38:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 23:38:48,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:48,292 INFO L523 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:48,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-02 23:38:48,292 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash -961396624, now seen corresponding path program 67 times [2021-05-02 23:38:48,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:48,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491276597] [2021-05-02 23:38:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:48,302 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_2922 50) InVars {main_~main__x~0=v_main_~main__x~0_2922} OutVars{main_~main__x~0=v_main_~main__x~0_2922} AuxVars[] AssignedVars[] [2021-05-02 23:38:48,303 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:38:48,311 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:48,318 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:48,327 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:38:48,344 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2924 100) (<= 50 v_main_~main__x~0_2924)) InVars {main_~main__x~0=v_main_~main__x~0_2924} OutVars{main_~main__x~0=v_main_~main__x~0_2924} AuxVars[] AssignedVars[] [2021-05-02 23:38:48,346 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:48,365 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:48,368 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:48,381 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:48,385 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:48,409 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:48,437 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:48,441 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2926 99) (<= 50 v_main_~main__x~0_2926)) InVars {main_~main__x~0=v_main_~main__x~0_2926} OutVars{main_~main__x~0=v_main_~main__x~0_2926} AuxVars[] AssignedVars[] [2021-05-02 23:38:48,443 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:38:48,445 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:48,452 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:48,465 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:38:48,472 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:38:48,512 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:38:48,588 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_2928 99) (< v_main_~main__x~0_2928 50)) InVars {main_~main__x~0=v_main_~main__x~0_2928} OutVars{main_~main__x~0=v_main_~main__x~0_2928} AuxVars[] AssignedVars[] [2021-05-02 23:38:48,590 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:38:48,599 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:38:48,607 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:38:48,617 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:38:48,630 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:38:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:48,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:48,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:48,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:38:52,124 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:52,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491276597] [2021-05-02 23:38:52,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491276597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:52,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:52,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:38:52,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102691806] [2021-05-02 23:38:52,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:38:52,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:38:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1585, Invalid=5555, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:38:52,126 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 82 states, 82 states have (on average 1.951219512195122) internal successors, (160), 81 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:03,081 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-05-02 23:39:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:39:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.951219512195122) internal successors, (160), 81 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 23:39:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:03,084 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:39:03,084 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 23:39:03,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6810 ImplicationChecksByTransitivity, 10321.7ms TimeCoverageRelationStatistics Valid=4586, Invalid=21820, Unknown=0, NotChecked=0, Total=26406 [2021-05-02 23:39:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 23:39:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-05-02 23:39:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-05-02 23:39:03,106 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2021-05-02 23:39:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:03,106 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-05-02 23:39:03,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.951219512195122) internal successors, (160), 81 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-05-02 23:39:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:39:03,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:03,107 INFO L523 BasicCegarLoop]: trace histogram [69, 41, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:03,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-05-02 23:39:03,107 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash -491725206, now seen corresponding path program 68 times [2021-05-02 23:39:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:03,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707010444] [2021-05-02 23:39:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:03,121 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3000 50) InVars {main_~main__x~0=v_main_~main__x~0_3000} OutVars{main_~main__x~0=v_main_~main__x~0_3000} AuxVars[] AssignedVars[] [2021-05-02 23:39:03,122 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:39:03,124 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:03,131 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:03,152 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:39:03,168 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3002 100) (<= 50 v_main_~main__x~0_3002)) InVars {main_~main__x~0=v_main_~main__x~0_3002} OutVars{main_~main__x~0=v_main_~main__x~0_3002} AuxVars[] AssignedVars[] [2021-05-02 23:39:03,170 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:03,194 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:03,197 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:03,212 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:03,215 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:03,233 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:03,261 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:03,264 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3004) (< v_main_~main__x~0_3004 99)) InVars {main_~main__x~0=v_main_~main__x~0_3004} OutVars{main_~main__x~0=v_main_~main__x~0_3004} AuxVars[] AssignedVars[] [2021-05-02 23:39:03,266 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:03,288 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:03,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:03,308 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:03,311 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:03,350 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:03,381 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3006 99) (< v_main_~main__x~0_3006 50)) InVars {main_~main__x~0=v_main_~main__x~0_3006} OutVars{main_~main__x~0=v_main_~main__x~0_3006} AuxVars[] AssignedVars[] [2021-05-02 23:39:03,383 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:39:03,385 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:03,392 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:03,415 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:39:03,430 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:03,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:03,767 INFO 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 23:39:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:03,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:08,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:08,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707010444] [2021-05-02 23:39:08,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707010444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:08,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:08,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:39:08,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387150073] [2021-05-02 23:39:08,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:39:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:39:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1547, Invalid=5763, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:39:08,161 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 83 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 82 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:21,478 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-05-02 23:39:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:39:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 82 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 23:39:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:21,480 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:39:21,480 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:39:21,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4770 ImplicationChecksByTransitivity, 13362.1ms TimeCoverageRelationStatistics Valid=4512, Invalid=22548, Unknown=0, NotChecked=0, Total=27060 [2021-05-02 23:39:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:39:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-05-02 23:39:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-05-02 23:39:21,503 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2021-05-02 23:39:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:21,503 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-05-02 23:39:21,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 82 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-05-02 23:39:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:39:21,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:21,504 INFO L523 BasicCegarLoop]: trace histogram [70, 41, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:21,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-05-02 23:39:21,504 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash -109058588, now seen corresponding path program 69 times [2021-05-02 23:39:21,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:21,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055382508] [2021-05-02 23:39:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:21,515 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3079 50) InVars {main_~main__x~0=v_main_~main__x~0_3079} OutVars{main_~main__x~0=v_main_~main__x~0_3079} AuxVars[] AssignedVars[] [2021-05-02 23:39:21,516 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:39:21,525 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:21,533 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:21,543 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:39:21,561 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3081 100) (<= 50 v_main_~main__x~0_3081)) InVars {main_~main__x~0=v_main_~main__x~0_3081} OutVars{main_~main__x~0=v_main_~main__x~0_3081} AuxVars[] AssignedVars[] [2021-05-02 23:39:21,563 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:21,582 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:21,585 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:21,600 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:21,603 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:21,627 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:21,656 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:21,659 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3083 99) (<= 50 v_main_~main__x~0_3083)) InVars {main_~main__x~0=v_main_~main__x~0_3083} OutVars{main_~main__x~0=v_main_~main__x~0_3083} AuxVars[] AssignedVars[] [2021-05-02 23:39:21,661 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:21,662 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:21,665 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:21,680 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:21,684 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:21,722 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:21,747 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3085 99) (< v_main_~main__x~0_3085 50)) InVars {main_~main__x~0=v_main_~main__x~0_3085} OutVars{main_~main__x~0=v_main_~main__x~0_3085} AuxVars[] AssignedVars[] [2021-05-02 23:39:21,748 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:39:21,757 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:21,763 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:21,772 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:39:21,786 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:22,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:22,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:26,046 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:26,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055382508] [2021-05-02 23:39:26,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055382508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:26,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:26,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:39:26,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780535449] [2021-05-02 23:39:26,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:39:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:39:26,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1591, Invalid=5891, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:39:26,048 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 84 states, 84 states have (on average 1.9523809523809523) internal successors, (164), 83 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:37,352 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2021-05-02 23:39:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:39:37,353 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9523809523809523) internal successors, (164), 83 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 23:39:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:37,354 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:39:37,354 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:39:37,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7241 ImplicationChecksByTransitivity, 12424.0ms TimeCoverageRelationStatistics Valid=4602, Invalid=23120, Unknown=0, NotChecked=0, Total=27722 [2021-05-02 23:39:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:39:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-05-02 23:39:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2021-05-02 23:39:37,385 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2021-05-02 23:39:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:37,386 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2021-05-02 23:39:37,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.9523809523809523) internal successors, (164), 83 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2021-05-02 23:39:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:39:37,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:37,387 INFO L523 BasicCegarLoop]: trace histogram [71, 41, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:37,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-05-02 23:39:37,387 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1733626146, now seen corresponding path program 70 times [2021-05-02 23:39:37,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:37,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161480373] [2021-05-02 23:39:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:37,397 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3159 50) InVars {main_~main__x~0=v_main_~main__x~0_3159} OutVars{main_~main__x~0=v_main_~main__x~0_3159} AuxVars[] AssignedVars[] [2021-05-02 23:39:37,399 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:39:37,401 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:37,408 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:37,430 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:39:37,449 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3161 100) (<= 50 v_main_~main__x~0_3161)) InVars {main_~main__x~0=v_main_~main__x~0_3161} OutVars{main_~main__x~0=v_main_~main__x~0_3161} AuxVars[] AssignedVars[] [2021-05-02 23:39:37,451 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:37,453 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:37,455 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:37,471 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:37,475 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:37,515 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:37,546 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:37,550 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3163) (< v_main_~main__x~0_3163 99)) InVars {main_~main__x~0=v_main_~main__x~0_3163} OutVars{main_~main__x~0=v_main_~main__x~0_3163} AuxVars[] AssignedVars[] [2021-05-02 23:39:37,553 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:37,573 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:37,576 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:37,592 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:37,596 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:37,619 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:37,649 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3165 50) (< v_main_~main__x~0_3165 99)) InVars {main_~main__x~0=v_main_~main__x~0_3165} OutVars{main_~main__x~0=v_main_~main__x~0_3165} AuxVars[] AssignedVars[] [2021-05-02 23:39:37,651 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:39:37,661 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:37,669 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:37,679 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:39:37,694 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:38,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:38,008 INFO 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 23:39:38,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:38,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:38,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:41,890 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:41,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161480373] [2021-05-02 23:39:41,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161480373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:41,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:41,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:39:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950746788] [2021-05-02 23:39:41,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:39:41,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:39:41,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=6062, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:39:41,892 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 85 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 84 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:55,428 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2021-05-02 23:39:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:39:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 84 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 23:39:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:55,431 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:39:55,431 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:39:55,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7458 ImplicationChecksByTransitivity, 12408.6ms TimeCoverageRelationStatistics Valid=4610, Invalid=23782, Unknown=0, NotChecked=0, Total=28392 [2021-05-02 23:39:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:39:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-05-02 23:39:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2021-05-02 23:39:55,483 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 169 [2021-05-02 23:39:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:55,483 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2021-05-02 23:39:55,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 84 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2021-05-02 23:39:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 23:39:55,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:55,484 INFO L523 BasicCegarLoop]: trace histogram [72, 41, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:55,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-05-02 23:39:55,484 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash 425046360, now seen corresponding path program 71 times [2021-05-02 23:39:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:55,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845613448] [2021-05-02 23:39:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:55,500 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3240 50) InVars {main_~main__x~0=v_main_~main__x~0_3240} OutVars{main_~main__x~0=v_main_~main__x~0_3240} AuxVars[] AssignedVars[] [2021-05-02 23:39:55,502 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:39:55,514 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,523 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:55,534 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:39:55,556 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3242 100) (<= 50 v_main_~main__x~0_3242)) InVars {main_~main__x~0=v_main_~main__x~0_3242} OutVars{main_~main__x~0=v_main_~main__x~0_3242} AuxVars[] AssignedVars[] [2021-05-02 23:39:55,559 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:55,579 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,582 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,596 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:55,600 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:55,625 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:55,652 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:55,656 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3244 99) (<= 50 v_main_~main__x~0_3244)) InVars {main_~main__x~0=v_main_~main__x~0_3244} OutVars{main_~main__x~0=v_main_~main__x~0_3244} AuxVars[] AssignedVars[] [2021-05-02 23:39:55,658 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:39:55,659 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,662 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,675 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:39:55,678 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:39:55,726 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:39:55,764 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3246 50) (< v_main_~main__x~0_3246 99)) InVars {main_~main__x~0=v_main_~main__x~0_3246} OutVars{main_~main__x~0=v_main_~main__x~0_3246} AuxVars[] AssignedVars[] [2021-05-02 23:39:55,766 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:39:55,767 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:39:55,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:39:55,794 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:39:55,811 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:39:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:56,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:56,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:56,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:39:56,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:00,646 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845613448] [2021-05-02 23:40:00,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845613448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:00,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:00,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:40:00,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783958248] [2021-05-02 23:40:00,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:40:00,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:40:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1597, Invalid=6235, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:40:00,648 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 86 states, 86 states have (on average 1.9534883720930232) internal successors, (168), 85 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:16,038 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2021-05-02 23:40:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:40:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9534883720930232) internal successors, (168), 85 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 23:40:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:16,040 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:40:16,040 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 23:40:16,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7676 ImplicationChecksByTransitivity, 14133.1ms TimeCoverageRelationStatistics Valid=4618, Invalid=24452, Unknown=0, NotChecked=0, Total=29070 [2021-05-02 23:40:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 23:40:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-05-02 23:40:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-05-02 23:40:16,066 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2021-05-02 23:40:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:16,066 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-05-02 23:40:16,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.9534883720930232) internal successors, (168), 85 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-05-02 23:40:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:40:16,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:16,067 INFO L523 BasicCegarLoop]: trace histogram [73, 41, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:16,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-05-02 23:40:16,067 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 440120658, now seen corresponding path program 72 times [2021-05-02 23:40:16,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:16,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457166263] [2021-05-02 23:40:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:16,077 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3322 50) InVars {main_~main__x~0=v_main_~main__x~0_3322} OutVars{main_~main__x~0=v_main_~main__x~0_3322} AuxVars[] AssignedVars[] [2021-05-02 23:40:16,079 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:40:16,080 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:16,107 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:40:16,129 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3324 100) (<= 50 v_main_~main__x~0_3324)) InVars {main_~main__x~0=v_main_~main__x~0_3324} OutVars{main_~main__x~0=v_main_~main__x~0_3324} AuxVars[] AssignedVars[] [2021-05-02 23:40:16,131 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:16,133 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,136 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,155 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:16,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:16,204 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:16,232 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:40:16,235 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3326 99) (<= 50 v_main_~main__x~0_3326)) InVars {main_~main__x~0=v_main_~main__x~0_3326} OutVars{main_~main__x~0=v_main_~main__x~0_3326} AuxVars[] AssignedVars[] [2021-05-02 23:40:16,237 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:16,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,276 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:16,280 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:16,306 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:16,337 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3328 99) (< v_main_~main__x~0_3328 50)) InVars {main_~main__x~0=v_main_~main__x~0_3328} OutVars{main_~main__x~0=v_main_~main__x~0_3328} AuxVars[] AssignedVars[] [2021-05-02 23:40:16,339 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:40:16,349 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,358 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:16,370 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:40:16,388 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:40:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:16,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:16,718 INFO 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 23:40:16,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:16,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:21,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457166263] [2021-05-02 23:40:21,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457166263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:21,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:21,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:40:21,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018346943] [2021-05-02 23:40:21,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:40:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:40:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=6410, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:40:21,046 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:35,855 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2021-05-02 23:40:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:40:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 23:40:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:35,857 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:40:35,857 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:40:35,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7895 ImplicationChecksByTransitivity, 13810.6ms TimeCoverageRelationStatistics Valid=4626, Invalid=25130, Unknown=0, NotChecked=0, Total=29756 [2021-05-02 23:40:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:40:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-05-02 23:40:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-05-02 23:40:35,883 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2021-05-02 23:40:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:35,883 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-05-02 23:40:35,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-05-02 23:40:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:40:35,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:35,884 INFO L523 BasicCegarLoop]: trace histogram [74, 41, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:35,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-05-02 23:40:35,885 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2041619148, now seen corresponding path program 73 times [2021-05-02 23:40:35,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:35,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120057604] [2021-05-02 23:40:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:35,911 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3405 50) InVars {main_~main__x~0=v_main_~main__x~0_3405} OutVars{main_~main__x~0=v_main_~main__x~0_3405} AuxVars[] AssignedVars[] [2021-05-02 23:40:35,912 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:40:35,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:35,920 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:35,940 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:40:35,959 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3407) (< v_main_~main__x~0_3407 100)) InVars {main_~main__x~0=v_main_~main__x~0_3407} OutVars{main_~main__x~0=v_main_~main__x~0_3407} AuxVars[] AssignedVars[] [2021-05-02 23:40:35,961 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:35,962 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:35,965 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:35,987 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:35,991 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:36,030 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:36,057 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:40:36,060 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3409 99) (<= 50 v_main_~main__x~0_3409)) InVars {main_~main__x~0=v_main_~main__x~0_3409} OutVars{main_~main__x~0=v_main_~main__x~0_3409} AuxVars[] AssignedVars[] [2021-05-02 23:40:36,062 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:36,080 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:36,083 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:36,098 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:36,101 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:36,122 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:36,154 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3411 99) (< v_main_~main__x~0_3411 50)) InVars {main_~main__x~0=v_main_~main__x~0_3411} OutVars{main_~main__x~0=v_main_~main__x~0_3411} AuxVars[] AssignedVars[] [2021-05-02 23:40:36,156 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:40:36,165 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:36,173 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:36,182 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:40:36,198 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:40:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:36,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:36,510 INFO 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 23:40:36,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:36,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:36,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:41,272 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:41,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120057604] [2021-05-02 23:40:41,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [120057604] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:41,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:41,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:40:41,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867819620] [2021-05-02 23:40:41,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:40:41,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:40:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=6587, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:40:41,274 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 88 states, 88 states have (on average 1.9545454545454546) internal successors, (172), 87 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:58,121 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2021-05-02 23:40:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:40:58,123 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9545454545454546) internal successors, (172), 87 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 23:40:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:58,124 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:40:58,124 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:40:58,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8115 ImplicationChecksByTransitivity, 14673.9ms TimeCoverageRelationStatistics Valid=4634, Invalid=25816, Unknown=0, NotChecked=0, Total=30450 [2021-05-02 23:40:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:40:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-05-02 23:40:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2021-05-02 23:40:58,151 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2021-05-02 23:40:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:58,151 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2021-05-02 23:40:58,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.9545454545454546) internal successors, (172), 87 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2021-05-02 23:40:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 23:40:58,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:58,152 INFO L523 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:58,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-05-02 23:40:58,152 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash -811591226, now seen corresponding path program 74 times [2021-05-02 23:40:58,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:58,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801359420] [2021-05-02 23:40:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:58,177 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3489 50) InVars {main_~main__x~0=v_main_~main__x~0_3489} OutVars{main_~main__x~0=v_main_~main__x~0_3489} AuxVars[] AssignedVars[] [2021-05-02 23:40:58,179 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:40:58,181 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:58,189 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:58,212 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:40:58,237 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3491 100) (<= 50 v_main_~main__x~0_3491)) InVars {main_~main__x~0=v_main_~main__x~0_3491} OutVars{main_~main__x~0=v_main_~main__x~0_3491} AuxVars[] AssignedVars[] [2021-05-02 23:40:58,239 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:58,262 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:58,278 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:58,299 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:58,304 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:58,334 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:58,370 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:40:58,373 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3493 99) (<= 50 v_main_~main__x~0_3493)) InVars {main_~main__x~0=v_main_~main__x~0_3493} OutVars{main_~main__x~0=v_main_~main__x~0_3493} AuxVars[] AssignedVars[] [2021-05-02 23:40:58,376 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:58,398 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:58,403 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:58,420 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:58,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:58,454 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:58,491 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3495 50) (< v_main_~main__x~0_3495 99)) InVars {main_~main__x~0=v_main_~main__x~0_3495} OutVars{main_~main__x~0=v_main_~main__x~0_3495} AuxVars[] AssignedVars[] [2021-05-02 23:40:58,496 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:40:58,497 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:58,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:40:58,530 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:40:58,550 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:40:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:58,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:58,980 INFO 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 23:40:58,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:58,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:59,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:04,026 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:04,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801359420] [2021-05-02 23:41:04,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801359420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:04,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:04,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:41:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154573856] [2021-05-02 23:41:04,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:41:04,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:41:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1606, Invalid=6766, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:41:04,028 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 89 states, 89 states have (on average 1.9550561797752808) internal successors, (174), 88 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:22,363 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2021-05-02 23:41:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:41:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9550561797752808) internal successors, (174), 88 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2021-05-02 23:41:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:22,366 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:41:22,366 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 23:41:22,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8336 ImplicationChecksByTransitivity, 15871.9ms TimeCoverageRelationStatistics Valid=4642, Invalid=26510, Unknown=0, NotChecked=0, Total=31152 [2021-05-02 23:41:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 23:41:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-05-02 23:41:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2021-05-02 23:41:22,394 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2021-05-02 23:41:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:22,394 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2021-05-02 23:41:22,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.9550561797752808) internal successors, (174), 88 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2021-05-02 23:41:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 23:41:22,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:22,395 INFO L523 BasicCegarLoop]: trace histogram [76, 41, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:22,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-05-02 23:41:22,395 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1737341504, now seen corresponding path program 75 times [2021-05-02 23:41:22,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:22,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960032138] [2021-05-02 23:41:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:22,444 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3574 50) InVars {main_~main__x~0=v_main_~main__x~0_3574} OutVars{main_~main__x~0=v_main_~main__x~0_3574} AuxVars[] AssignedVars[] [2021-05-02 23:41:22,447 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:22,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:22,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:22,516 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:22,558 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3576) (< v_main_~main__x~0_3576 100)) InVars {main_~main__x~0=v_main_~main__x~0_3576} OutVars{main_~main__x~0=v_main_~main__x~0_3576} AuxVars[] AssignedVars[] [2021-05-02 23:41:22,561 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:22,564 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:22,568 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:22,587 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:22,593 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:22,647 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:22,681 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:41:22,684 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3578) (< v_main_~main__x~0_3578 99)) InVars {main_~main__x~0=v_main_~main__x~0_3578} OutVars{main_~main__x~0=v_main_~main__x~0_3578} AuxVars[] AssignedVars[] [2021-05-02 23:41:22,687 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:22,688 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:22,693 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:22,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:22,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:22,765 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:22,800 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3580 50) (< v_main_~main__x~0_3580 99)) InVars {main_~main__x~0=v_main_~main__x~0_3580} OutVars{main_~main__x~0=v_main_~main__x~0_3580} AuxVars[] AssignedVars[] [2021-05-02 23:41:22,802 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:22,815 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:22,825 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:22,839 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:22,860 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:41:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:23,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:23,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:23,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:23,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:28,435 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:28,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960032138] [2021-05-02 23:41:28,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [960032138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:28,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:28,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:41:28,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840886509] [2021-05-02 23:41:28,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:41:28,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:28,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:41:28,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1574, Invalid=6982, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:41:28,437 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 90 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 89 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:44,956 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2021-05-02 23:41:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:41:44,957 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 89 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2021-05-02 23:41:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:44,958 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:41:44,958 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 23:41:44,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8558 ImplicationChecksByTransitivity, 15567.0ms TimeCoverageRelationStatistics Valid=4580, Invalid=27282, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 23:41:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 23:41:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-05-02 23:41:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2021-05-02 23:41:44,994 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2021-05-02 23:41:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:44,994 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2021-05-02 23:41:44,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 89 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2021-05-02 23:41:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 23:41:44,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:44,995 INFO L523 BasicCegarLoop]: trace histogram [77, 41, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:44,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-05-02 23:41:44,995 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1164630982, now seen corresponding path program 76 times [2021-05-02 23:41:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:44,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373573691] [2021-05-02 23:41:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:45,011 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3660 50) InVars {main_~main__x~0=v_main_~main__x~0_3660} OutVars{main_~main__x~0=v_main_~main__x~0_3660} AuxVars[] AssignedVars[] [2021-05-02 23:41:45,012 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:41:45,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,021 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:45,039 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:41:45,059 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3662 100) (<= 50 v_main_~main__x~0_3662)) InVars {main_~main__x~0=v_main_~main__x~0_3662} OutVars{main_~main__x~0=v_main_~main__x~0_3662} AuxVars[] AssignedVars[] [2021-05-02 23:41:45,061 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:45,081 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,083 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,101 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:45,105 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:45,128 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:45,158 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:41:45,161 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3664 99) (<= 50 v_main_~main__x~0_3664)) InVars {main_~main__x~0=v_main_~main__x~0_3664} OutVars{main_~main__x~0=v_main_~main__x~0_3664} AuxVars[] AssignedVars[] [2021-05-02 23:41:45,163 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:45,182 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,184 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:45,203 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:45,227 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:45,260 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3666 50) (< v_main_~main__x~0_3666 99)) InVars {main_~main__x~0=v_main_~main__x~0_3666} OutVars{main_~main__x~0=v_main_~main__x~0_3666} AuxVars[] AssignedVars[] [2021-05-02 23:41:45,261 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:41:45,271 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:45,278 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:41:45,288 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:41:45,305 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:41:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:45,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:45,587 INFO 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 23:41:45,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:45,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:50,038 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:50,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373573691] [2021-05-02 23:41:50,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373573691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:50,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:50,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:41:50,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569103625] [2021-05-02 23:41:50,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:41:50,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:41:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1576, Invalid=7166, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:41:50,040 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 91 states, 91 states have (on average 1.956043956043956) internal successors, (178), 90 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:02,718 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2021-05-02 23:42:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:42:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.956043956043956) internal successors, (178), 90 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2021-05-02 23:42:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:02,719 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:42:02,720 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:42:02,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8781 ImplicationChecksByTransitivity, 12900.1ms TimeCoverageRelationStatistics Valid=4586, Invalid=27994, Unknown=0, NotChecked=0, Total=32580 [2021-05-02 23:42:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:42:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-05-02 23:42:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2021-05-02 23:42:02,754 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2021-05-02 23:42:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:02,755 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2021-05-02 23:42:02,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.956043956043956) internal successors, (178), 90 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2021-05-02 23:42:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 23:42:02,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:02,755 INFO L523 BasicCegarLoop]: trace histogram [78, 41, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:02,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-05-02 23:42:02,756 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1768552372, now seen corresponding path program 77 times [2021-05-02 23:42:02,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:02,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765671728] [2021-05-02 23:42:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:02,764 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3747 50) InVars {main_~main__x~0=v_main_~main__x~0_3747} OutVars{main_~main__x~0=v_main_~main__x~0_3747} AuxVars[] AssignedVars[] [2021-05-02 23:42:02,766 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:02,767 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,773 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:02,791 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:02,811 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3749) (< v_main_~main__x~0_3749 100)) InVars {main_~main__x~0=v_main_~main__x~0_3749} OutVars{main_~main__x~0=v_main_~main__x~0_3749} AuxVars[] AssignedVars[] [2021-05-02 23:42:02,813 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:02,814 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:02,844 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:02,884 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:02,914 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:42:02,916 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3751) (< v_main_~main__x~0_3751 99)) InVars {main_~main__x~0=v_main_~main__x~0_3751} OutVars{main_~main__x~0=v_main_~main__x~0_3751} AuxVars[] AssignedVars[] [2021-05-02 23:42:02,918 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:02,919 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:02,932 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:02,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:02,963 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:02,988 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3753 99) (< v_main_~main__x~0_3753 50)) InVars {main_~main__x~0=v_main_~main__x~0_3753} OutVars{main_~main__x~0=v_main_~main__x~0_3753} AuxVars[] AssignedVars[] [2021-05-02 23:42:02,990 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:02,998 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:03,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:03,012 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:03,026 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:42:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:03,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:03,287 INFO 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 23:42:03,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:03,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:03,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:07,316 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:07,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765671728] [2021-05-02 23:42:07,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765671728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:07,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:07,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:42:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843421781] [2021-05-02 23:42:07,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:42:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:07,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:42:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:42:07,332 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 92 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 91 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:19,910 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2021-05-02 23:42:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:42:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 91 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-05-02 23:42:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:19,912 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:42:19,912 INFO L226 Difference]: Without dead ends: 187 [2021-05-02 23:42:19,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9005 ImplicationChecksByTransitivity, 12477.7ms TimeCoverageRelationStatistics Valid=4592, Invalid=28714, Unknown=0, NotChecked=0, Total=33306 [2021-05-02 23:42:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-02 23:42:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-05-02 23:42:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2021-05-02 23:42:19,942 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2021-05-02 23:42:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:19,942 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2021-05-02 23:42:19,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 91 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2021-05-02 23:42:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:42:19,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:19,943 INFO L523 BasicCegarLoop]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:19,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-05-02 23:42:19,943 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1235757906, now seen corresponding path program 78 times [2021-05-02 23:42:19,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:19,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903541705] [2021-05-02 23:42:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:19,952 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3835 50) InVars {main_~main__x~0=v_main_~main__x~0_3835} OutVars{main_~main__x~0=v_main_~main__x~0_3835} AuxVars[] AssignedVars[] [2021-05-02 23:42:19,954 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:19,954 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:19,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:19,977 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:20,004 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3837 100) (<= 50 v_main_~main__x~0_3837)) InVars {main_~main__x~0=v_main_~main__x~0_3837} OutVars{main_~main__x~0=v_main_~main__x~0_3837} AuxVars[] AssignedVars[] [2021-05-02 23:42:20,006 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:20,022 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,028 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,042 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:20,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:20,065 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:20,089 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:42:20,092 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3839) (< v_main_~main__x~0_3839 99)) InVars {main_~main__x~0=v_main_~main__x~0_3839} OutVars{main_~main__x~0=v_main_~main__x~0_3839} AuxVars[] AssignedVars[] [2021-05-02 23:42:20,094 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:20,112 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,114 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,125 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:20,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:20,146 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:20,173 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3841 50) (< v_main_~main__x~0_3841 99)) InVars {main_~main__x~0=v_main_~main__x~0_3841} OutVars{main_~main__x~0=v_main_~main__x~0_3841} AuxVars[] AssignedVars[] [2021-05-02 23:42:20,175 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:20,175 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:20,182 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:20,200 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:20,215 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:42:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:20,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:20,515 INFO 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 23:42:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:20,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:25,104 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:25,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903541705] [2021-05-02 23:42:25,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903541705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:25,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:25,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:42:25,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940484493] [2021-05-02 23:42:25,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:42:25,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:25,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:42:25,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1618, Invalid=7502, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:42:25,107 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:38,500 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2021-05-02 23:42:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:42:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-05-02 23:42:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:38,502 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:42:38,502 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:42:38,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9230 ImplicationChecksByTransitivity, 13566.7ms TimeCoverageRelationStatistics Valid=4674, Invalid=29366, Unknown=0, NotChecked=0, Total=34040 [2021-05-02 23:42:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:42:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-05-02 23:42:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2021-05-02 23:42:38,533 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2021-05-02 23:42:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:38,533 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2021-05-02 23:42:38,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2021-05-02 23:42:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 23:42:38,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:38,534 INFO L523 BasicCegarLoop]: trace histogram [80, 41, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:38,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-05-02 23:42:38,534 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2135055144, now seen corresponding path program 79 times [2021-05-02 23:42:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:38,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487924290] [2021-05-02 23:42:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:38,545 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_3924 50) InVars {main_~main__x~0=v_main_~main__x~0_3924} OutVars{main_~main__x~0=v_main_~main__x~0_3924} AuxVars[] AssignedVars[] [2021-05-02 23:42:38,547 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:42:38,548 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:38,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:38,578 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:42:38,601 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_3926) (< v_main_~main__x~0_3926 100)) InVars {main_~main__x~0=v_main_~main__x~0_3926} OutVars{main_~main__x~0=v_main_~main__x~0_3926} AuxVars[] AssignedVars[] [2021-05-02 23:42:38,603 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:38,622 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:38,625 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:38,641 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:38,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:38,670 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:38,705 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:42:38,708 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3928 99) (<= 50 v_main_~main__x~0_3928)) InVars {main_~main__x~0=v_main_~main__x~0_3928} OutVars{main_~main__x~0=v_main_~main__x~0_3928} AuxVars[] AssignedVars[] [2021-05-02 23:42:38,710 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:38,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:38,714 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:38,730 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:38,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:38,773 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:38,809 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_3930 99) (< v_main_~main__x~0_3930 50)) InVars {main_~main__x~0=v_main_~main__x~0_3930} OutVars{main_~main__x~0=v_main_~main__x~0_3930} AuxVars[] AssignedVars[] [2021-05-02 23:42:38,811 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:42:38,812 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:38,820 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:42:38,850 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:42:38,869 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:42:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:39,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:39,230 INFO 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 23:42:39,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:39,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:39,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:44,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:44,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487924290] [2021-05-02 23:42:44,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [487924290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:44,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:44,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:42:44,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004543421] [2021-05-02 23:42:44,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:42:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:44,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:42:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1621, Invalid=7691, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:42:44,020 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 94 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 93 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:01,710 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2021-05-02 23:43:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:43:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 93 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2021-05-02 23:43:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:01,713 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:43:01,713 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 23:43:01,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9456 ImplicationChecksByTransitivity, 15433.5ms TimeCoverageRelationStatistics Valid=4682, Invalid=30100, Unknown=0, NotChecked=0, Total=34782 [2021-05-02 23:43:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 23:43:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-05-02 23:43:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-05-02 23:43:01,745 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2021-05-02 23:43:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:01,745 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-05-02 23:43:01,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 93 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-05-02 23:43:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 23:43:01,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:01,746 INFO L523 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:01,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-05-02 23:43:01,746 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1213912286, now seen corresponding path program 80 times [2021-05-02 23:43:01,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:01,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083321594] [2021-05-02 23:43:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:01,764 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4014 50) InVars {main_~main__x~0=v_main_~main__x~0_4014} OutVars{main_~main__x~0=v_main_~main__x~0_4014} AuxVars[] AssignedVars[] [2021-05-02 23:43:01,766 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:01,782 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:01,794 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:01,809 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:01,841 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4016 100) (<= 50 v_main_~main__x~0_4016)) InVars {main_~main__x~0=v_main_~main__x~0_4016} OutVars{main_~main__x~0=v_main_~main__x~0_4016} AuxVars[] AssignedVars[] [2021-05-02 23:43:01,843 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:01,845 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:01,847 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:01,859 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:01,863 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:01,912 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:01,953 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:01,957 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4018 99) (<= 50 v_main_~main__x~0_4018)) InVars {main_~main__x~0=v_main_~main__x~0_4018} OutVars{main_~main__x~0=v_main_~main__x~0_4018} AuxVars[] AssignedVars[] [2021-05-02 23:43:01,959 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:01,982 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:01,985 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:02,000 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:02,005 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:02,028 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:02,067 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4020 50) (< v_main_~main__x~0_4020 99)) InVars {main_~main__x~0=v_main_~main__x~0_4020} OutVars{main_~main__x~0=v_main_~main__x~0_4020} AuxVars[] AssignedVars[] [2021-05-02 23:43:02,069 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:02,079 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:02,088 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:02,101 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:02,121 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:02,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:02,485 INFO 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 23:43:02,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:02,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:02,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:07,646 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:07,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083321594] [2021-05-02 23:43:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083321594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:07,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:07,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:43:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52678993] [2021-05-02 23:43:07,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:43:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:43:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1584, Invalid=7922, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:43:07,648 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 95 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 94 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:26,915 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2021-05-02 23:43:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:43:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 94 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 23:43:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:26,918 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:43:26,918 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 23:43:26,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9683 ImplicationChecksByTransitivity, 16558.2ms TimeCoverageRelationStatistics Valid=4610, Invalid=30922, Unknown=0, NotChecked=0, Total=35532 [2021-05-02 23:43:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 23:43:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 23:43:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-05-02 23:43:26,950 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2021-05-02 23:43:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:26,951 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-05-02 23:43:26,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 94 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-05-02 23:43:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 23:43:26,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:26,952 INFO L523 BasicCegarLoop]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:26,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-05-02 23:43:26,952 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1653859484, now seen corresponding path program 81 times [2021-05-02 23:43:26,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:26,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530504780] [2021-05-02 23:43:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:26,963 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4105 50) InVars {main_~main__x~0=v_main_~main__x~0_4105} OutVars{main_~main__x~0=v_main_~main__x~0_4105} AuxVars[] AssignedVars[] [2021-05-02 23:43:26,965 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:26,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:26,976 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:27,002 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:27,027 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4107 100) (<= 50 v_main_~main__x~0_4107)) InVars {main_~main__x~0=v_main_~main__x~0_4107} OutVars{main_~main__x~0=v_main_~main__x~0_4107} AuxVars[] AssignedVars[] [2021-05-02 23:43:27,029 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:27,060 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:27,063 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:27,084 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:27,089 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:27,125 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:27,173 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:27,177 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_4109) (< v_main_~main__x~0_4109 99)) InVars {main_~main__x~0=v_main_~main__x~0_4109} OutVars{main_~main__x~0=v_main_~main__x~0_4109} AuxVars[] AssignedVars[] [2021-05-02 23:43:27,180 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:27,182 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:27,185 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:27,208 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:27,213 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:27,265 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:27,307 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4111 99) (< v_main_~main__x~0_4111 50)) InVars {main_~main__x~0=v_main_~main__x~0_4111} OutVars{main_~main__x~0=v_main_~main__x~0_4111} AuxVars[] AssignedVars[] [2021-05-02 23:43:27,309 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:27,322 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:27,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:27,344 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:27,373 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:27,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:27,715 INFO 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 23:43:27,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:27,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:32,637 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530504780] [2021-05-02 23:43:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530504780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:32,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:32,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:43:32,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194705469] [2021-05-02 23:43:32,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:43:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:43:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1586, Invalid=8116, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:43:32,639 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 96 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 95 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:53,733 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2021-05-02 23:43:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:43:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 95 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 23:43:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:53,738 INFO L225 Difference]: With dead ends: 198 [2021-05-02 23:43:53,738 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 23:43:53,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9911 ImplicationChecksByTransitivity, 15561.5ms TimeCoverageRelationStatistics Valid=4616, Invalid=31674, Unknown=0, NotChecked=0, Total=36290 [2021-05-02 23:43:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 23:43:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-05-02 23:43:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-05-02 23:43:53,771 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2021-05-02 23:43:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:53,771 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-05-02 23:43:53,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 95 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-05-02 23:43:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 23:43:53,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:53,772 INFO L523 BasicCegarLoop]: trace histogram [83, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:53,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-05-02 23:43:53,773 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 213526422, now seen corresponding path program 82 times [2021-05-02 23:43:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580245780] [2021-05-02 23:43:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:53,784 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4197 50) InVars {main_~main__x~0=v_main_~main__x~0_4197} OutVars{main_~main__x~0=v_main_~main__x~0_4197} AuxVars[] AssignedVars[] [2021-05-02 23:43:53,786 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:43:53,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:53,799 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:53,832 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:43:53,869 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4199 100) (<= 50 v_main_~main__x~0_4199)) InVars {main_~main__x~0=v_main_~main__x~0_4199} OutVars{main_~main__x~0=v_main_~main__x~0_4199} AuxVars[] AssignedVars[] [2021-05-02 23:43:53,871 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:53,898 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:53,901 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:53,920 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:53,925 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:53,961 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:54,019 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:54,023 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4201 99) (<= 50 v_main_~main__x~0_4201)) InVars {main_~main__x~0=v_main_~main__x~0_4201} OutVars{main_~main__x~0=v_main_~main__x~0_4201} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,026 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:54,051 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,054 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,075 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:54,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:54,115 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:54,179 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4203 99) (< v_main_~main__x~0_4203 50)) InVars {main_~main__x~0=v_main_~main__x~0_4203} OutVars{main_~main__x~0=v_main_~main__x~0_4203} AuxVars[] AssignedVars[] [2021-05-02 23:43:54,181 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:43:54,195 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:54,206 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:43:54,222 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:43:54,248 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:43:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:54,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:54,731 INFO 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 23:43:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:01,268 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580245780] [2021-05-02 23:44:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580245780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:01,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:01,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:44:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824236319] [2021-05-02 23:44:01,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:44:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:44:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1630, Invalid=8270, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:44:01,270 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 97 states, 97 states have (on average 1.958762886597938) internal successors, (190), 96 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:20,374 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2021-05-02 23:44:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:44:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.958762886597938) internal successors, (190), 96 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 23:44:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:20,377 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:44:20,377 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 23:44:20,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10140 ImplicationChecksByTransitivity, 18930.2ms TimeCoverageRelationStatistics Valid=4706, Invalid=32350, Unknown=0, NotChecked=0, Total=37056 [2021-05-02 23:44:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 23:44:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-02 23:44:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2021-05-02 23:44:20,413 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2021-05-02 23:44:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:20,413 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2021-05-02 23:44:20,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 1.958762886597938) internal successors, (190), 96 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2021-05-02 23:44:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 23:44:20,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:20,414 INFO L523 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:20,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-05-02 23:44:20,414 INFO L428 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -967076848, now seen corresponding path program 83 times [2021-05-02 23:44:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:20,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669559589] [2021-05-02 23:44:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:20,427 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4290 50) InVars {main_~main__x~0=v_main_~main__x~0_4290} OutVars{main_~main__x~0=v_main_~main__x~0_4290} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,429 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:20,431 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:20,479 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:20,511 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4292 100) (<= 50 v_main_~main__x~0_4292)) InVars {main_~main__x~0=v_main_~main__x~0_4292} OutVars{main_~main__x~0=v_main_~main__x~0_4292} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,514 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:20,536 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,558 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:20,564 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:20,595 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:20,637 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:20,643 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4294 99) (<= 50 v_main_~main__x~0_4294)) InVars {main_~main__x~0=v_main_~main__x~0_4294} OutVars{main_~main__x~0=v_main_~main__x~0_4294} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,645 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:20,647 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,650 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,666 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:20,671 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:20,720 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:20,763 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4296 99) (< v_main_~main__x~0_4296 50)) InVars {main_~main__x~0=v_main_~main__x~0_4296} OutVars{main_~main__x~0=v_main_~main__x~0_4296} AuxVars[] AssignedVars[] [2021-05-02 23:44:20,765 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:20,776 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:20,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:20,799 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:20,822 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:21,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:21,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:28,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669559589] [2021-05-02 23:44:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [669559589] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:28,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:28,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:44:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522542387] [2021-05-02 23:44:28,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:44:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:44:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1590, Invalid=8510, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:44:28,124 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 98 states, 98 states have (on average 1.9591836734693877) internal successors, (192), 97 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:54,661 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2021-05-02 23:44:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:44:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.9591836734693877) internal successors, (192), 97 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 23:44:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:54,665 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:44:54,665 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 23:44:54,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10370 ImplicationChecksByTransitivity, 20271.6ms TimeCoverageRelationStatistics Valid=4628, Invalid=33202, Unknown=0, NotChecked=0, Total=37830 [2021-05-02 23:44:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 23:44:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-05-02 23:44:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2021-05-02 23:44:54,700 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2021-05-02 23:44:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:54,700 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2021-05-02 23:44:54,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 1.9591836734693877) internal successors, (192), 97 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2021-05-02 23:44:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 23:44:54,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:54,701 INFO L523 BasicCegarLoop]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:54,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-05-02 23:44:54,701 INFO L428 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1655453174, now seen corresponding path program 84 times [2021-05-02 23:44:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:54,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104205173] [2021-05-02 23:44:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:54,711 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4384 50) InVars {main_~main__x~0=v_main_~main__x~0_4384} OutVars{main_~main__x~0=v_main_~main__x~0_4384} AuxVars[] AssignedVars[] [2021-05-02 23:44:54,713 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:44:54,714 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,725 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:54,752 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:44:54,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4386 100) (<= 50 v_main_~main__x~0_4386)) InVars {main_~main__x~0=v_main_~main__x~0_4386} OutVars{main_~main__x~0=v_main_~main__x~0_4386} AuxVars[] AssignedVars[] [2021-05-02 23:44:54,788 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:54,814 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,835 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:54,840 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:54,872 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:54,922 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:54,926 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4388 99) (<= 50 v_main_~main__x~0_4388)) InVars {main_~main__x~0=v_main_~main__x~0_4388} OutVars{main_~main__x~0=v_main_~main__x~0_4388} AuxVars[] AssignedVars[] [2021-05-02 23:44:54,928 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:54,930 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,933 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:54,951 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:54,958 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:55,007 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:55,064 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4390 99) (< v_main_~main__x~0_4390 50)) InVars {main_~main__x~0=v_main_~main__x~0_4390} OutVars{main_~main__x~0=v_main_~main__x~0_4390} AuxVars[] AssignedVars[] [2021-05-02 23:44:55,066 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:44:55,067 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:55,077 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:44:55,104 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:44:55,134 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:44:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:55,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:55,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:55,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:03,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:03,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104205173] [2021-05-02 23:45:03,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [104205173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:03,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:03,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:45:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932197683] [2021-05-02 23:45:03,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:45:03,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:45:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1592, Invalid=8710, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:45:03,152 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:35,354 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2021-05-02 23:45:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:45:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 23:45:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:35,357 INFO L225 Difference]: With dead ends: 204 [2021-05-02 23:45:35,357 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 23:45:35,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10601 ImplicationChecksByTransitivity, 23434.8ms TimeCoverageRelationStatistics Valid=4634, Invalid=33978, Unknown=0, NotChecked=0, Total=38612 [2021-05-02 23:45:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 23:45:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-05-02 23:45:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-05-02 23:45:35,393 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2021-05-02 23:45:35,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:35,393 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-05-02 23:45:35,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-05-02 23:45:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 23:45:35,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:35,394 INFO L523 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:35,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-05-02 23:45:35,395 INFO L428 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1760138876, now seen corresponding path program 85 times [2021-05-02 23:45:35,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:35,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544207954] [2021-05-02 23:45:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:35,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4479 50) InVars {main_~main__x~0=v_main_~main__x~0_4479} OutVars{main_~main__x~0=v_main_~main__x~0_4479} AuxVars[] AssignedVars[] [2021-05-02 23:45:35,421 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:45:35,422 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,437 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:35,477 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:45:35,518 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4481 100) (<= 50 v_main_~main__x~0_4481)) InVars {main_~main__x~0=v_main_~main__x~0_4481} OutVars{main_~main__x~0=v_main_~main__x~0_4481} AuxVars[] AssignedVars[] [2021-05-02 23:45:35,521 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:35,562 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,565 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,589 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:35,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:35,628 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:35,697 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:35,702 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_4483) (< v_main_~main__x~0_4483 99)) InVars {main_~main__x~0=v_main_~main__x~0_4483} OutVars{main_~main__x~0=v_main_~main__x~0_4483} AuxVars[] AssignedVars[] [2021-05-02 23:45:35,704 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:35,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,734 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,754 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:35,759 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:35,792 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:35,845 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4485 99) (< v_main_~main__x~0_4485 50)) InVars {main_~main__x~0=v_main_~main__x~0_4485} OutVars{main_~main__x~0=v_main_~main__x~0_4485} AuxVars[] AssignedVars[] [2021-05-02 23:45:35,846 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:45:35,864 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:35,874 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:45:35,888 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:45:35,914 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:36,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:36,412 INFO 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 23:45:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:36,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:36,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:45,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:45,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544207954] [2021-05-02 23:45:45,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [544207954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:45,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:45,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:45:45,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676426733] [2021-05-02 23:45:45,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:45:45,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:45:45,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=8912, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:45:45,726 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 100 states, 100 states have (on average 1.96) internal successors, (196), 99 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:59,720 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 23:46:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:21,930 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2021-05-02 23:46:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:46:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.96) internal successors, (196), 99 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2021-05-02 23:46:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:21,934 INFO L225 Difference]: With dead ends: 206 [2021-05-02 23:46:21,934 INFO L226 Difference]: Without dead ends: 203 [2021-05-02 23:46:21,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10833 ImplicationChecksByTransitivity, 26990.8ms TimeCoverageRelationStatistics Valid=4640, Invalid=34762, Unknown=0, NotChecked=0, Total=39402 [2021-05-02 23:46:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-02 23:46:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-05-02 23:46:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-05-02 23:46:21,974 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2021-05-02 23:46:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:21,975 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-05-02 23:46:21,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 1.96) internal successors, (196), 99 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-05-02 23:46:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-05-02 23:46:21,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:21,976 INFO L523 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:21,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-05-02 23:46:21,976 INFO L428 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 716116606, now seen corresponding path program 86 times [2021-05-02 23:46:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:21,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054558852] [2021-05-02 23:46:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:21,998 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~main__x~0_4575 50) InVars {main_~main__x~0=v_main_~main__x~0_4575} OutVars{main_~main__x~0=v_main_~main__x~0_4575} AuxVars[] AssignedVars[] [2021-05-02 23:46:22,000 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size [2021-05-02 23:46:22,002 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,015 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:22,043 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 91.7 percent of original size 44 [2021-05-02 23:46:22,083 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4577 100) (<= 50 v_main_~main__x~0_4577)) InVars {main_~main__x~0=v_main_~main__x~0_4577} OutVars{main_~main__x~0=v_main_~main__x~0_4577} AuxVars[] AssignedVars[] [2021-05-02 23:46:22,085 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:22,112 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,117 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,151 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:22,157 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:22,196 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:22,255 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:22,260 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4579 99) (<= 50 v_main_~main__x~0_4579)) InVars {main_~main__x~0=v_main_~main__x~0_4579} OutVars{main_~main__x~0=v_main_~main__x~0_4579} AuxVars[] AssignedVars[] [2021-05-02 23:46:22,262 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:22,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,317 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:22,322 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:22,364 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:22,426 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_4581 50) (< v_main_~main__x~0_4581 99)) InVars {main_~main__x~0=v_main_~main__x~0_4581} OutVars{main_~main__x~0=v_main_~main__x~0_4581} AuxVars[] AssignedVars[] [2021-05-02 23:46:22,428 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size [2021-05-02 23:46:22,430 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,447 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-02 23:46:22,480 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 63.8 percent of original size 44 [2021-05-02 23:46:22,513 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:23,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:23,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:23,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:23,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:34,126 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054558852] [2021-05-02 23:46:34,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054558852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:34,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:34,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:46:34,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643160000] [2021-05-02 23:46:34,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:46:34,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:46:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=9111, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:46:34,128 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 101 states, 101 states have (on average 1.9603960396039604) internal successors, (198), 100 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)